I wanted to display logs on stdout and log file along with the timestamp. None of the above answers worked for me. I made use of process substitution and exec command and came up with the following code. Sample logs:

2017-06-21 11:16:41+05:30 Fetching information about files in the directory...

Add following lines at the top of your script:

LOG_FILE=script.log
exec > >(while read -r line; do printf '%s %s\n' "$(date --rfc-3339=seconds)" "$line" | tee -a $LOG_FILE; done)
exec 2> >(while read -r line; do printf '%s %s\n' "$(date --rfc-3339=seconds)" "$line" | tee -a $LOG_FILE; done >&2)

Hope this helps somebody!

From grep --help, but also see man grep:

Exit status is 0 if any line was selected, 1 otherwise; if any error occurs and -q was not given, the exit status is 2.

if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
  echo exists
else
  echo not found
fi

You may want to use a more specific regex, such as ^MYSQL_ROLE=master$, to avoid that string in comments, names that merely start with "master", etc.

This works because the if takes a command and runs it, and uses the return value of that command to decide how to proceed, with zero meaning true and non-zero meaning false—the same as how other return codes are interpreted by the shell, and the opposite of a language like C.

You just need to do:

#!/bin/bash
count=$(cat last_queries.txt | wc -l)
$(perl test.pl test2 $count)

However, if you want to call your Perl command later, and that's why you want to assign it to a variable, then:

#!/bin/bash
count=$(cat last_queries.txt | wc -l)
var="perl test.pl test2 $count" # You need double quotes to get your $count value substituted.

...stuff...

eval $var

As per Bash's help:

~$ help eval
eval: eval [arg ...]
    Execute arguments as a shell command.

    Combine ARGs into a single string, use the result as input to the shell,
    and execute the resulting commands.

    Exit Status:
    Returns exit status of command or success if command is null.

Try to complete cmake process with following libs:

sudo apt-get install cmake libblkid-dev e2fslibs-dev libboost-all-dev libaudit-dev

Here is the one through AWK:

$ foo="Hello"
$ foo=$(awk -v var=$foo 'BEGIN{print var" World"}')
$ echo $foo
Hello World

comm -23 <(ls dir1 |sort) <(ls dir2|sort)

This command will give you files those are in dir1 and not in dir2.

About <( ) sign, you can google it as 'process substitution'.

This is due to IFS (Internal Field Separator) variable which contains newline.

$ cat xx1
1
2

$ A=`cat xx1`
$ echo $A
1 2

$ echo "|$IFS|"
|       
|

A workaround is to reset IFS to not contain the newline, temporarily:

$ IFSBAK=$IFS
$ IFS=" "
$ A=`cat xx1` # Can use $() as well
$ echo $A
1
2
$ IFS=$IFSBAK

To REVERT this horrible change for IFS:

IFS=$IFSBAK

You can also do it using reredirect (https://github.com/jerome-pouiller/reredirect/).

The command bellow redirects the outputs (standard and error) of the process PID to FILE:

reredirect -m FILE PID

The README of reredirect also explains other interesting features: how to restore the original state of the process, how to redirect to another command or to redirect only stdout or stderr.

The tool also provides relink, a script allowing to redirect the outputs to the current terminal:

relink PID
relink PID | grep usefull_content

(reredirect seems to have same features than Dupx described in another answer but, it does not depend on Gdb).

I don't know why this old issue popped up today in the Bash tagged listings, but just in case for future researchers, keep in mind that you can avoid escaping by using ASCII codes of the chars you need to echo.

Example:

 echo -e "This is \x22\x27\x22\x27\x22text\x22\x27\x22\x27\x22"
 This is "'"'"text"'"'"

\x22 is the ASCII code (in hex) for double quotes and \x27 for single quotes. Similarly you can echo any character.

I suppose if we try to echo the above string with backslashes, we will need a messy two rows backslashed echo... :)

For variable assignment this is the equivalent:

 $ a=$'This is \x22text\x22'
 $ echo "$a"
 This is "text"

If the variable is already set by another program, you can still apply double/single quotes with sed or similar tools.

Example:

 $ b="Just another text here"
 $ echo "$b"
 Just another text here
 $ sed 's/text/"'\0'"/' <<<"$b" #\0 is a special sed operator
 Just another "0" here #this is not what i wanted to be
 $ sed 's/text/\x22\x27\0\x27\x22/' <<<"$b"
 Just another "'text'" here #now we are talking. You would normally need a dozen of backslashes to achieve the same result in the normal way.

Doing this with POSIX is tricky:

• POSIX Sed does not support \r or \15. Even if it did, the in place option -i is not POSIX

• POSIX Awk does support \r and \15, however the -i inplace option is not POSIX

• d2u and dos2unix are not POSIX utilities, but ex is

• POSIX ex does not support \r, \15, \n or \12

To remove carriage returns:

awk 'BEGIN{RS="^$";ORS="";getline;gsub("\r","");print>ARGV[1]}' file

To add carriage returns:

awk 'BEGIN{RS="^$";ORS="";getline;gsub("\n","\r&");print>ARGV[1]}' file

The following will work for KornShell(ksh) where the process substitution is not available,

# create a combined(stdin and stdout) collector
exec 3 <> combined.log

# stream stderr instead of stdout to tee, while draining all stdout to the collector
./aaa.sh 2>&1 1>&3 | tee -a stderr.log 1>&3

# cleanup collector
exec 3>&-

The real trick here, is the sequence of the 2>&1 1>&3 which in our case redirects the stderr to stdout and redirects the stdout to descriptor 3. At this point the stderr and stdout are not combined yet.

In effect, the stderr(as stdin) is passed to tee where it logs to stderr.log and also redirects to descriptor 3.

And descriptor 3 is logging it to combined.log all the time. So the combined.log contains both stdout and stderr.

I often include a function called run() to handle errors. Every call I want to make is passed to this function so the entire script exits when a failure is hit. The advantage of this over the set -e solution is that the script doesn't exit silently when a line fails, and can tell you what the problem is. In the following example, the 3rd line is not executed because the script exits at the call to false.

function run() {
  cmd_output=$(eval $1)
  return_value=$?
  if [ $return_value != 0 ]; then
    echo "Command $1 failed"
    exit -1
  else
    echo "output: $cmd_output"
    echo "Command succeeded."
  fi
  return $return_value
}
run "date"
run "false"
run "date"

for the whole question:

cmd >> o.txt && [[ $(wc -l <o.txt) -eq 720 ]] && mv o.txt $(date +%F).o.txt

this will append 720 lines (30*24) into o.txt and after will rename the file based on the current date.

Run the above with the cron every hour, or

while :
do
    cmd >> o.txt && [[ $(wc -l <o.txt) -eq 720 ]] && mv o.txt $(date +%F).o.txt
    sleep 3600
done

Another option...

To make this works

docker run -d --rm $IMG_NAME "bash:command1&&command2&&command3"

in dockerfile

ENTRYPOINT ["/entrypoint.sh"]

in entrypoint.sh

#!/bin/sh

entrypoint_params=$1
printf "==>[entrypoint.sh] %s\n" "entry_point_param is $entrypoint_params"

PARAM1=$(echo $entrypoint_params | cut -d':' -f1) # output is 1 must be 'bash' it     will be tested    
PARAM2=$(echo $entrypoint_params | cut -d':' -f2) # the real command separated by     &&

printf "==>[entrypoint.sh] %s\n" "PARAM1=$PARAM1"
printf "==>[entrypoint.sh] %s\n" "PARAM2=$PARAM2"

if [ "$PARAM1" = "bash" ];
then
    printf "==>[entrypoint.sh] %s\n" "about to running $PARAM2 command"
    echo $PARAM2 | tr '&&' '\n' | while read cmd; do
        $cmd
    done    
fi

In the question:

who | grep $(tty | sed s:/dev/::)

outputs errors claiming that files a and tty do not exist. I understood this to mean that tty is not being interpreted before execution of grep, but instead that bash passed tty as a parameter to grep, which interpreted it as a file name.

There is also a situation of nested redirection, which should be handled by matched parentheses which should specify a child process, but bash is primitively a word separator, creating parameters to be sent to a program, therefore parentheses are not matched first, but interpreted as seen.

I got specific with grep, and specified the file as a parameter instead of using a pipe. I also simplified the base command, passing output from a command as a file, so that i/o piping would not be nested:

grep $(tty | sed s:/dev/::) <(who)

works well.

who | grep $(echo pts/3)

is not really desired, but eliminates the nested pipe and also works well.

In conclusion, bash does not seem to like nested pipping. It is important to understand that bash is not a new-wave program written in a recursive manner. Instead, bash is an old 1,2,3 program, which has been appended with features. For purposes of assuring backward compatibility, the initial manner of interpretation has never been modified. If bash was rewritten to first match parentheses, how many bugs would be introduced into how many bash programs? Many programmers love to be cryptic.

My suggestion does not come from Terminal; however, this is a much easier way.

For .bat files, you can run them through Wine. Use this video to help you install it: https://www.youtube.com/watch?v=DkS8i_blVCA. This video will explain how to install, setup and use Wine. It is as simple as opening the .bat file in Wine itself, and it will run just as it would on Windows.

Through this, you can also run .exe files, as well .sh files.

This is much simpler than trying to work out all kinds of terminal code.

cp -R t1/ t2

The trailing slash on the source directory changes the semantics slightly, so it copies the contents but not the directory itself. It also avoids the problems with globbing and invisible files that Bertrand's answer has (copying t1/* misses invisible files, copying `t1/* t1/.*' copies t1/. and t1/.., which you don't want).

cut -c1

This is POSIX, and unlike case actually extracts the first char if you need it for later:

myvar=abc
first_char="$(printf '%s' "$myvar" | cut -c1)"
if [ "$first_char" = a ]; then
  echo 'starts with a'
else
  echo 'does not start with a'
fi

awk substr is another POSIX but less efficient alternative:

printf '%s' "$myvar" | awk '{print substr ($0, 0, 1)}'

printf '%s' is to avoid problems with escape characters: https://stackoverflow.com/a/40423558/895245 e.g.:

myvar='\n'
printf '%s' "$myvar" | cut -c1

outputs \ as expected.

${::} does not seem to be POSIX.

See also: How to extract the first two characters of a string in shell scripting?

Give -f to pkill

pkill -f /usr/local/bin/fritzcap.py

exact path of .py file is

# ps ax | grep fritzcap.py
 3076 pts/1    Sl     0:00 python -u /usr/local/bin/fritzcap.py -c -d -m

if [ -n "$PID" -a -e /proc/$PID ]; then
    echo "process exists"
fi

or

if [ -n "$(ps -p $PID -o pid=)" ]

In the latter form, -o pid= is an output format to display only the process ID column with no header. The quotes are necessary for non-empty string operator -n to give valid result.

Bash 3.0+ can use this syntax:

for i in {1..10} ; do ... ; done

..which avoids spawning an external program to expand the sequence (such as seq 1 10).

Of course, this has the same problem as the for(()) solution, being tied to bash and even a particular version (if this matters to you).

I think you can try this Bash debugger: http://bashdb.sourceforge.net/.

You can use this if you want similar syntax

a=$(( $((b==5)) ? c : d ))

It is correct that rm –rf . will remove everything in the current directly including any subdirectories and their content. The single dot (.) means the current directory. be carefull not to do rm -rf .. since the double dot (..) means the previous directory.

This being said, if you are like me and have multiple terminal windows open at the same time, you'd better be safe and use rm -ir . Lets look at the command arguments to understand why.

First, if you look at the rm command man page (man rm under most Unix) you notice that –r means "remove the contents of directories recursively". So, doing rm -r . alone would delete everything in the current directory and everything bellow it.

In rm –rf . the added -f means "ignore nonexistent files, never prompt". That command deletes all the files and directories in the current directory and never prompts you to confirm you really want to do that. -f is particularly dangerous if you run the command under a privilege user since you could delete the content of any directory without getting a chance to make sure that's really what you want.

On the otherhand, in rm -ri . the -i that replaces the -f means "prompt before any removal". This means you'll get a chance to say "oups! that's not what I want" before rm goes happily delete all your files.

In my early sysadmin days I did an rm -rf / on a system while logged with full privileges (root). The result was two days passed a restoring the system from backups. That's why I now employ rm -ri now.

The syntax is token-level, so the meaning of the dollar sign depends on the token it's in. The expression $(command) is a modern synonym for `command` which stands for command substitution; it means run command and put its output here. So

echo "Today is $(date). A fine day."

will run the date command and include its output in the argument to echo. The parentheses are unrelated to the syntax for running a command in a subshell, although they have something in common (the command substitution also runs in a separate subshell).

By contrast, ${variable} is just a disambiguation mechanism, so you can say ${var}text when you mean the contents of the variable var, followed by text (as opposed to $vartext which means the contents of the variable vartext).

The while loop expects a single argument which should evaluate to true or false (or actually multiple, where the last one's truth value is examined -- thanks Jonathan Leffler for pointing this out); when it's false, the loop is no longer executed. The for loop iterates over a list of items and binds each to a loop variable in turn; the syntax you refer to is one (rather generalized) way to express a loop over a range of arithmetic values.

A for loop like that can be rephrased as a while loop. The expression

for ((init; check; step)); do
    body
done

is equivalent to

init
while check; do
    body
    step
done

It makes sense to keep all the loop control in one place for legibility; but as you can see when it's expressed like this, the for loop does quite a bit more than the while loop.

Of course, this syntax is Bash-specific; classic Bourne shell only has

for variable in token1 token2 ...; do

(Somewhat more elegantly, you could avoid the echo in the first example as long as you are sure that your argument string doesn't contain any % format codes:

date +'Today is %c. A fine day.'

Avoiding a process where you can is an important consideration, even though it doesn't make a lot of difference in this isolated example.)

In my .bash_profile I have :

# No Proxy
function noproxy
{
    /usr/local/sbin/noproxy  #turn off proxy server
    unset http_proxy HTTP_PROXY https_proxy HTTPs_PROXY
}


# Proxy
function setproxy
{
    sh /usr/local/sbin/proxyon  #turn on proxy server 
    http_proxy=http://127.0.0.1:8118/
    HTTP_PROXY=$http_proxy
    https_proxy=$http_proxy
    HTTPS_PROXY=$https_proxy
    export http_proxy https_proxy HTTP_PROXY HTTPS_PROXY
}

So when I want to disable the proxy, the function(s) run in the login shell and sets the variables as expected and wanted.

If you want to print output of anything in Bash without end of line, you echo it with the -n switch.

If you have it in a variable already, then echo it with the trailing newline cropped:

$ testvar=$(wc -l < log.txt)
$ echo -n $testvar

Or you can do it in one line, instead:

$ echo -n $(wc -l < log.txt)

You can check the existence of a symlink and that it is not broken with:

[ -L ${my_link} ] && [ -e ${my_link} ]

So, the complete solution is:

if [ -L ${my_link} ] ; then
   if [ -e ${my_link} ] ; then
      echo "Good link"
   else
      echo "Broken link"
   fi
elif [ -e ${my_link} ] ; then
   echo "Not a link"
else
   echo "Missing"
fi

-L tests whether there is a symlink, broken or not. By combining with -e you can test whether the link is valid (links to a directory or file), not just whether it exists.

sed -i '/pattern/d' file

Use 'd' to delete a line. This works at least with GNU-Sed.

If your Sed doesn't have the option, to change a file in place, maybe you can use an intermediate file, to store the modification:

sed '/pattern/d' file > tmpfile && mv tmpfile file

Writing directly to the source usually doesn't work: sed '/pattern/d' file > file so make a copy before trying out, if you doubt it.

On GNU-compatible systems (i.e. Linux):

find . -mtime 0 -printf '%T+\t%s\t%p\n' 2>/dev/null | sort -r | more

This will list files and directories that have been modified in the last 24 hours (-mtime 0). It will list them with the last modified time in a format that is both sortable and human-readable (%T+), followed by the file size (%s), followed by the full filename (%p), each separated by tabs (\t).

2>/dev/null throws away any stderr output, so that error messages don't muddy the waters; sort -r sorts the results by most recently modified first; and | more lists one page of results at a time.

read filename ;
sed -i 's/letter/newletter/g' "$filename" #letter

^use as many of these as you need, and you can make your own BASIC encryption

Also with indented source code you can use <<- (with a trailing dash) to ignore leading tabs (but not leading spaces).

For example this:

if [ some test ]; then
    cat <<- xx
        line1
        line2
xx
fi

Outputs indented text without the leading whitespace:

line1
line2

Advanced Bash-scripting Guide

date +%Y:%m:%d -d "yesterday"

For details about the date format see the man page for date

date --date='-1 day'

In bash script, what does #!/bin/bash at the 1st line mean ?

In Linux system, we have shell which interprets our UNIX commands. Now there are a number of shell in Unix system. Among them, there is a shell called bash which is very very common Linux and it has a long history. This is a by default shell in Linux.

When you write a script (collection of unix commands and so on) you have a option to specify which shell it can be used. Generally you can specify which shell it wold be by using Shebang(Yes that's what it's name).

So if you #!/bin/bash in the top of your scripts then you are telling your system to use bash as a default shell.

Now coming to your second question :Is there a difference between #!/bin/bash and #!/bin/sh ?

The answer is Yes. When you tell #!/bin/bash then you are telling your environment/ os to use bash as a command interpreter. This is hard coded thing.

Every system has its own shell which the system will use to execute its own system scripts. This system shell can be vary from OS to OS(most of the time it will be bash. Ubuntu recently using dash as default system shell). When you specify #!/bin/sh then system will use it's internal system shell to interpreting your shell scripts.

Visit this link for further information where I have explained this topic.

Hope this will eliminate your confusions...good luck.

I'm using the following to execute commands on the remote from my local computer:

ssh -i ~/.ssh/$GIT_PRIVKEY user@$IP "bash -s" < localpath/script.sh $arg1 $arg2

You say you're using:

time.asctime(time.localtime(date_in_seconds_from_bash))

where date_in_seconds_from_bash is presumably the output of date +%s.

The time.localtime function, as the name implies, gives you local time.

If you want UTC, use time.gmtime() rather than time.localtime().

As JamesNoonan33's answer says, the output of date +%s is timezone invariant, so date +%s is exactly equivalent to date -u %s. It prints the number of seconds since the "epoch", which is 1970-01-01 00:00:00 UTC. The output you show in your question is entirely consistent with that:

date -u
Thu Jul 3 07:28:20 UTC 2014

date +%s
1404372514   # 14 seconds after "date -u" command

date -u +%s
1404372515   # 15 seconds after "date -u" command

It can very much be an ssh-agent issue. Check whether there is an ssh-agent PID currently running with eval "$(ssh-agent -s)"

Check whether your identity is added with ssh-add -l and if not, add it with ssh-add <pathToYourRSAKey>.

Then try again your ssh command (or any other command that spawns ssh daemons, like autossh for example) that returned 255.

I encountered this error message while trying to install varnish cache on ubuntu. The google search landed me here for the error (23) Failed writing body, hence posting a solution that worked for me.

The bug is encountered while running the command as root curl -L https://packagecloud.io/varnishcache/varnish5/gpgkey | apt-key add -

the solution is to run apt-key add as non root

curl -L https://packagecloud.io/varnishcache/varnish5/gpgkey | apt-key add -

I had a similar issue and wrote a shell script for that reason. I've decided to post it regardless that many good answers were already posted because I think it can be helpful for someone. Feel free to improve it!

numerate

@Gnutt The behavior you want can be achieved by typing the following:

./numerate.sh -d <path to directory> -o modtime -L 4 -b <startnumber> -r

If the option -r is left out the reaming will be only simulated (Should be helpful for testing).

The otion L describes the length of the target number (which will be filled with leading zeros) it is also possible to add a prefix/suffix with the options -p <prefix> -s <suffix>.

In case somebody wants the files to be sorted numerically before they get numbered, just remove the -o modtime option.

The -m option is probably what you're looking for:

grep -m 10 PATTERN [FILE]

From man grep:

-m NUM, --max-count=NUM
        Stop reading a file after NUM matching lines.  If the  input  is
        standard  input  from a regular file, and NUM matching lines are
        output, grep ensures that the standard input  is  positioned  to
        just  after the last matching line before exiting, regardless of
        the presence of trailing context lines.  This enables a  calling
        process  to resume a search.

Note: grep stops reading the file once the specified number of matches have been found!

If array elements don't contain spaces, another (perhaps more readable) solution would be:

if echo ${arr[@]} | grep -q -w "d"; then 
    echo "is in array"
else 
    echo "is not in array"
fi

Make a script like this:

#!/bin/bash

echo $((0x$1)).$((0x$2)).$((0x$3)).$((0x$4))

Example:

sh converthextoip.sh c0 a8 00 0b

Result:

192.168.0.11

The main use of -f is to force the removal of files that would not be removed using rm by itself (as a special case, it "removes" non-existent files, thus suppressing the error message).

You can also just redirect the error message using

$ rm file.txt 2> /dev/null

(or your operating system's equivalent). You can check the value of $? immediately after calling rm to see if a file was actually removed or not.

for a solution that works without bash or certain features from read you can use stty to disable echo

stty_orig=$(stty -g)
stty -echo
read password
stty $stty_orig

return will cause the current function to go out of scope, while exit will cause the script to end at the point where it is called. Here is a sample program to help explain this:

#!/bin/bash

retfunc()
{
    echo "this is retfunc()"
    return 1
}

exitfunc()
{
    echo "this is exitfunc()"
    exit 1
}

retfunc
echo "We are still here"
exitfunc
echo "We will never see this"

Output

$ ./test.sh
this is retfunc()
We are still here
this is exitfunc()

You can do something like this in awk:

awk '{ print $NF }'

Edit: To avoid empty line :

awk 'NF{ print $NF }'

Pure Bash, no external utilities

This demonstration does full justification, but you can just omit subtracting the length of the second string if you want ragged-right lines.

pad=$(printf '%0.1s' "-"{1..60})
padlength=40
string2='bbbbbbb'
for string1 in a aa aaaa aaaaaaaa
do
     printf '%s' "$string1"
     printf '%*.*s' 0 $((padlength - ${#string1} - ${#string2} )) "$pad"
     printf '%s\n' "$string2"
     string2=${string2:1}
done

Unfortunately, in that technique, the length of the pad string has to be hardcoded to be longer than the longest one you think you'll need, but the padlength can be a variable as shown. However, you can replace the first line with these three to be able to use a variable for the length of the pad:

padlimit=60
pad=$(printf '%*s' "$padlimit")
pad=${pad// /-}

So the pad (padlimit and padlength) could be based on terminal width ($COLUMNS) or computed from the length of the longest data string.

Output:

a--------------------------------bbbbbbb
aa--------------------------------bbbbbb
aaaa-------------------------------bbbbb
aaaaaaaa----------------------------bbbb

Without subtracting the length of the second string:

a---------------------------------------bbbbbbb
aa--------------------------------------bbbbbb
aaaa------------------------------------bbbbb
aaaaaaaa--------------------------------bbbb

The first line could instead be the equivalent (similar to sprintf):

printf -v pad '%0.1s' "-"{1..60}

or similarly for the more dynamic technique:

printf -v pad '%*s' "$padlimit"

You can do the printing all on one line if you prefer:

printf '%s%*.*s%s\n' "$string1" 0 $((padlength - ${#string1} - ${#string2} )) "$pad" "$string2"

Above answers are correct, but if run script in other folder, there will be some problem.

For example, the a.sh and b.sh are in same folder, a include b with . ./b.sh to include.

When run script out of the folder, for example with xx/xx/xx/a.sh, file b.sh will not found: ./b.sh: No such file or directory.

I use

. $(dirname "$0")/b.sh

Use:

return [n]

From help return

return: return [n]

Return from a shell function.

Causes a function or sourced script to exit with the return value
specified by N.  If N is omitted, the return status is that of the
last command executed within the function or script.

Exit Status:
Returns N, or failure if the shell is not executing a function or script.

Given a unix timestamp (seconds since epoch) of 1494500000, do:

find . -type f -newermt "$(date '+%Y-%m-%d %H:%M:%S' -d @1494500000)"

To grep those files for "foo":

find . -type f -newermt "$(date '+%Y-%m-%d %H:%M:%S' -d @1494500000)" -exec grep -H 'foo' '{}' \;

You can also use awk:

awk 'END {print NR,"lines"}' filename

Or

awk 'END {print NR}' filename

Dimba's dd if=/dev/zero of=/dev/null is definitely correct, but also worth mentioning is verifying maxing the cpu to 100% usage. You can do this with

ps -axro pcpu | awk '{sum+=$1} END {print sum}'

This asks for ps output of a 1-minute average of the cpu usage by each process, then sums them with awk. While it's a 1 minute average, ps is smart enough to know if a process has only been around a few seconds and adjusts the time-window accordingly. Thus you can use this command to immediately see the result.

Like @zane-hooper, I've had a similar problem on NFS. On parallel / distributed filesystems the lag between you creating a file on one machine and the other machine "seeing" it can be very large, so I could wait up to a full minute after the creation of the file before the while loop exits (and there also is an aftereffect of it "seeing" an already deleted file).

This creates the illusion that the script "doesn't work", while in fact it is the filesystem that is dropping the ball.

This took me a while to figure out, hope it saves somebody some time.

PS This also causes an annoying number of "Stale file handler" errors.

You can define such a command easily, using a shell function. This method does not require any external program and does not spawn any child process. It does not attempt hazardous ls parsing and handles “special” characters (whitespaces, newlines, backslashes and so on) just fine. It only relies on the file name expansion mechanism provided by the shell. It is compatible with at least sh, bash and zsh.

The line below defines a function called count which prints the number of arguments with which it has been called.

count() { echo $#; }

Simply call it with the desired pattern:

count log*

For the result to be correct when the globbing pattern has no match, the shell option nullglob (or failglob — which is the default behavior on zsh) must be set at the time expansion happens. It can be set like this:

shopt -s nullglob    # for sh / bash
setopt nullglob      # for zsh

Depending on what you want to count, you might also be interested in the shell option dotglob.

Unfortunately, with bash at least, it is not easy to set these options locally. If you don’t want to set them globally, the most straightforward solution is to use the function in this more convoluted manner:

( shopt -s nullglob ; shopt -u failglob ; count log* )

If you want to recover the lightweight syntax count log*, or if you really want to avoid spawning a subshell, you may hack something along the lines of:

# sh / bash:
# the alias is expanded before the globbing pattern, so we
# can set required options before the globbing gets expanded,
# and restore them afterwards.
count() {
    eval "$_count_saved_shopts"
    unset _count_saved_shopts
    echo $#
}
alias count='
    _count_saved_shopts="$(shopt -p nullglob failglob)"
    shopt -s nullglob
    shopt -u failglob
    count'

As a bonus, this function is of a more general use. For instance:

count a* b*          # count files which match either a* or b*
count $(jobs -ps)    # count stopped jobs (sh / bash)

By turning the function into a script file (or an equivalent C program), callable from the PATH, it can also be composed with programs such as find and xargs:

find "$FIND_OPTIONS" -exec count {} \+    # count results of a search

Use eval:

x="ls | wc"
eval "$x"
y=$(eval "$x")
echo "$y"

$$ is defined to return the process ID of the parent in a subshell; from the man page under "Special Parameters":

$ Expands to the process ID of the shell. In a () subshell, it expands to the process ID of the current shell, not the subshell.

In bash 4, you can get the process ID of the child with BASHPID.

~ $ echo $$
17601
~ $ ( echo $$; echo $BASHPID )
17601
17634

Use sudo pico /etc/paths inside the terminal window and change the entries to the one you want to remove, then open a new terminal session.

As (Bourne) shell variables cannot contain dots you can replace them by underscores. Read every line, translate . in the key to _ and evaluate.

#/bin/sh

file="./app.properties"

if [ -f "$file" ]
then
  echo "$file found."

  while IFS='=' read -r key value
  do
    key=$(echo $key | tr '.' '_')
    eval ${key}=\${value}
  done < "$file"

  echo "User Id       = " ${db_uat_user}
  echo "user password = " ${db_uat_passwd}
else
  echo "$file not found."
fi

Note that the above only translates . to _, if you have a more complex format you may want to use additional translations. I recently had to parse a full Ant properties file with lots of nasty characters, and there I had to use:

key=$(echo $key | tr .-/ _ | tr -cd 'A-Za-z0-9_')

Use the vim-way:

$ ex +'bufdo retab' -cxa **/*.*

• ^{Make the backup! before executing the above command, as it can corrupt your binary files.}
• ^{To use globstar (**) for recursion, activate by shopt -s globstar.}
• ^{To specify specific file type, use for example: **/*.c.}

To modify tabstop, add +'set ts=2'.

However the down-side is that it can replace tabs inside the strings.

So for slightly better solution (by using substitution), try:

$ ex -s +'bufdo %s/^\t\+/  /ge' -cxa **/*.*

Or by using ex editor + expand utility:

$ ex -s +'bufdo!%!expand -t2' -cxa **/*.*

For trailing spaces, see: How to remove trailing whitespaces for multiple files?

You may add the following function into your .bash_profile:

# Convert tabs to spaces.
# Usage: retab *.*
# See: https://stackoverflow.com/q/11094383/55075
retab() {
  ex +'set ts=2' +'bufdo retab' -cxa $*
}

try this:

head -1 /etc/*release | awk '{print $1}'

In Bash I prefer doing this as it addresses itself more as a conditional operation unlike using (( )) which is more of arithmetic.

[[ N -gt M ]]

Unless I do complex stuffs like

(( (N + 1) > M ))

But everyone just has their own preferences. Sad thing is that some people impose their unofficial standards.

Update:

You actually can also do this:

[[ 'N + 1' -gt M ]]

Which allows you to add something else which you could do with [[ ]] besides arithmetic stuff.

It is possible you use the bash program, with the parameter -c for execute the commands:

bashCommand = "cwm --rdf test.rdf --ntriples > test.nt"
output = subprocess.check_output(['bash','-c', bashCommand])

the safest way is to put the ! for the regex negation within the [[ ]] like this:

if [[ ! ${STR} =~ YOUR_REGEX ]]; then

otherwise it might fail on certain systems.

Consider also passing in the shell variable (EMAILID) as a jq variable (here also EMAILID, for the sake of illustration):

   projectID=$(jq -r --arg EMAILID "$EMAILID" '
        .resource[]
        | select(.username==$EMAILID) 
        | .id' file.json)

Postscript

For the record, another possibility would be to use jq's env function for accessing environment variables. For example, consider this sequence of bash commands:

[email protected]  # not exported
EMAILID="$EMAILID" jq -n 'env.EMAILID'

The output is a JSON string:

"[email protected]"

timestamp=$(awk 'BEGIN {srand(); print srand()}')

srand without a value uses the current timestamp with most Awk implementations.

Also, in addition to torek's answer: one thing that stands out is that you're using a lazily-evaluated macro assignment.

If you're on GNU Make, use the := assignment instead of =. This assignment causes the right hand side to be expanded immediately, and stored in the left hand variable.

FILES := $(shell ...)  # expand now; FILES is now the result of $(shell ...)

FILES = $(shell ...)   # expand later: FILES holds the syntax $(shell ...)

If you use the = assignment, it means that every single occurrence of $(FILES) will be expanding the $(shell ...) syntax and thus invoking the shell command. This will make your make job run slower, or even have some surprising consequences.

I faced same issue & it resolved by

ENTRYPOINT ["sh", "/docker-entrypoint.sh"]

For the Dockerfile in the original question it should be like:

ENTRYPOINT ["sh", "/usr/src/app/docker-entrypoint.sh"]

I used to do this using xxd

echo -n 5a | xxd -r -p

But then I realised that in Debian/Ubuntu, xxd is part of vim-common and hence might not be present in a minimal system. To also avoid perl (imho also not part of a minimal system) I ended up using sed, xargs and printf like this:

echo -n 5a | sed 's/\([0-9A-F]\{2\}\)/\\\\\\x\1/gI' | xargs printf

Mostly I only want to convert a few bytes and it's okay for such tasks. The advantage of this solution over the one of ghostdog74 is, that this can convert hex strings of arbitrary lengths automatically. xargs is used because printf doesnt read from standard input.

Bash can be pretty obtuse sometimes.

The following commands all return different error messages for basically the same error:

$ echo hello >
bash: syntax error near unexpected token `newline`

$ echo hello > ${NONEXISTENT}
bash: ${NONEXISTENT}: ambiguous redirect

$ echo hello > "${NONEXISTENT}"
bash: : No such file or directory

Adding quotes around the variable seems to be a good way to deal with the "ambiguous redirect" message: You tend to get a better message when you've made a typing mistake -- and when the error is due to spaces in the filename, using quotes is the fix.

Modify your PATH in .bashrc, not in .bash_profile:

http://www.gnu.org/software/bash/manual/bashref.html#Bash-Startup-Files

the main problem occur when you don't have date --date option available and you don't have permission to install it, then try below -

Previous month
#cal -3|awk 'NR==1{print toupper(substr($1,1,3))"-"$2}'
DEC-2016 
Current month
#cal -3|awk 'NR==1{print toupper(substr($3,1,3))"-"$4}'
JAN-2017
Next month
#cal -3|awk 'NR==1{print toupper(substr($5,1,3))"-"$6}'
FEB-2017

NB: In case the idea isn't obvious, it is a bad idea to use aliases for anything but aliases, the first one being the 'function in an alias' and the second one being the 'hard to read redirect/source'. Also, there are flaws (which i thought would be obvious, but just in case you are confused: I do not mean them to actually be used... anywhere!)

................................................................................................................................................

I've answered this before, and it has always been like this in the past:

alias foo='__foo() { unset -f $0; echo "arg1 for foo=$1"; }; __foo()'

which is fine and good, unless you are avoiding the use of functions all together. in which case you can take advantage of bash's vast ability to redirect text:

alias bar='cat <<< '\''echo arg1 for bar=$1'\'' | source /dev/stdin'

They are both about the same length give or take a few characters.

The real kicker is the time difference, the top being the 'function method' and the bottom being the 'redirect-source' method. To prove this theory, the timing speaks for itself:

arg1 for foo=FOOVALUE
 real 0m0.011s user 0m0.004s sys 0m0.008s  # <--time spent in foo
 real 0m0.000s user 0m0.000s sys 0m0.000s  # <--time spent in bar
arg1 for bar=BARVALUE
ubuntu@localhost /usr/bin# time foo FOOVALUE; time bar BARVALUE
arg1 for foo=FOOVALUE
 real 0m0.010s user 0m0.004s sys 0m0.004s
 real 0m0.000s user 0m0.000s sys 0m0.000s
arg1 for bar=BARVALUE
ubuntu@localhost /usr/bin# time foo FOOVALUE; time bar BARVALUE
arg1 for foo=FOOVALUE
 real 0m0.011s user 0m0.000s sys 0m0.012s
 real 0m0.000s user 0m0.000s sys 0m0.000s
arg1 for bar=BARVALUE
ubuntu@localhost /usr/bin# time foo FOOVALUE; time bar BARVALUE
arg1 for foo=FOOVALUE
 real 0m0.012s user 0m0.004s sys 0m0.004s
 real 0m0.000s user 0m0.000s sys 0m0.000s
arg1 for bar=BARVALUE
ubuntu@localhost /usr/bin# time foo FOOVALUE; time bar BARVALUE
arg1 for foo=FOOVALUE
 real 0m0.010s user 0m0.008s sys 0m0.004s
 real 0m0.000s user 0m0.000s sys 0m0.000s
arg1 for bar=BARVALUE

This is the bottom part of about 200 results, done at random intervals. It seems that function creation/destruction takes more time than redirection. Hopefully this will help future visitors to this question (didn't want to keep it to myself).

I have built semi-long shell scripts (300-500 lines) and Python code which does similar functionality. When many external commands are being executed, I find the shell is easier to use. Perl is also a good option when there is lots of text manipulation.

Mixing positional and flag-based arguments

--param=arg (equals delimited)

Freely mixing flags between positional arguments:

./script.sh dumbo 127.0.0.1 --environment=production -q -d
./script.sh dumbo --environment=production 127.0.0.1 --quiet -d

can be accomplished with a fairly concise approach:

# process flags
pointer=1
while [[ $pointer -le $# ]]; do
   param=${!pointer}
   if [[ $param != "-"* ]]; then ((pointer++)) # not a parameter flag so advance pointer
   else
      case $param in
         # paramter-flags with arguments
         -e=*|--environment=*) environment="${param#*=}";;
                  --another=*) another="${param#*=}";;

         # binary flags
         -q|--quiet) quiet=true;;
                 -d) debug=true;;
      esac

      # splice out pointer frame from positional list
      [[ $pointer -gt 1 ]] \
         && set -- ${@:1:((pointer - 1))} ${@:((pointer + 1)):$#} \
         || set -- ${@:((pointer + 1)):$#};
   fi
done

# positional remain
node_name=$1
ip_address=$2

--param arg (space delimited)

It's usualy clearer to not mix --flag=value and --flag value styles.

./script.sh dumbo 127.0.0.1 --environment production -q -d

This is a little dicey to read, but is still valid

./script.sh dumbo --environment production 127.0.0.1 --quiet -d

Source

# process flags
pointer=1
while [[ $pointer -le $# ]]; do
   if [[ ${!pointer} != "-"* ]]; then ((pointer++)) # not a parameter flag so advance pointer
   else
      param=${!pointer}
      ((pointer_plus = pointer + 1))
      slice_len=1

      case $param in
         # paramter-flags with arguments
         -e|--environment) environment=${!pointer_plus}; ((slice_len++));;
                --another) another=${!pointer_plus}; ((slice_len++));;

         # binary flags
         -q|--quiet) quiet=true;;
                 -d) debug=true;;
      esac

      # splice out pointer frame from positional list
      [[ $pointer -gt 1 ]] \
         && set -- ${@:1:((pointer - 1))} ${@:((pointer + $slice_len)):$#} \
         || set -- ${@:((pointer + $slice_len)):$#};
   fi
done

# positional remain
node_name=$1
ip_address=$2

classic solution:

for f in $(find . -name "*dbg*"); do mv $f $(echo $f | sed 's/_dbg//'); done

Try this

#/bin/bash

read -p "Enter a word: " word
echo "You entered $word"

Actually, RESULT contains what you want — to demonstrate:

echo "$RESULT"

What you show is what you get from:

echo $RESULT

As noted in the comments, the difference is that (1) the double-quoted version of the variable (echo "$RESULT") preserves internal spacing of the value exactly as it is represented in the variable — newlines, tabs, multiple blanks and all — whereas (2) the unquoted version (echo $RESULT) replaces each sequence of one or more blanks, tabs and newlines with a single space. Thus (1) preserves the shape of the input variable, whereas (2) creates a potentially very long single line of output with 'words' separated by single spaces (where a 'word' is a sequence of non-whitespace characters; there needn't be any alphanumerics in any of the words).

I think that you need to step back and think about what a map, or associative array, really is. All it is is a way to store a value for a given key, and get that value back quickly and efficiently. You may also want to be able to iterate over the keys to retrieve every key value pair, or delete keys and their associated values.

Now, think about a data structure you use all the time in shell scripting, and even just in the shell without writing a script, that has these properties. Stumped? It's the filesystem.

Really, all you need to have an associative array in shell programming is a temp directory. mktemp -d is your associative array constructor:

prefix=$(basename -- "$0")
map=$(mktemp -dt ${prefix})
echo >${map}/key somevalue
value=$(cat ${map}/key)

If you don't feel like using echo and cat, you can always write some little wrappers; these ones are modelled off of Irfan's, though they just output the value rather than setting arbitrary variables like $value:

#!/bin/sh

prefix=$(basename -- "$0")
mapdir=$(mktemp -dt ${prefix})
trap 'rm -r ${mapdir}' EXIT

put() {
  [ "$#" != 3 ] && exit 1
  mapname=$1; key=$2; value=$3
  [ -d "${mapdir}/${mapname}" ] || mkdir "${mapdir}/${mapname}"
  echo $value >"${mapdir}/${mapname}/${key}"
}

get() {
  [ "$#" != 2 ] && exit 1
  mapname=$1; key=$2
  cat "${mapdir}/${mapname}/${key}"
}

put "newMap" "name" "Irfan Zulfiqar"
put "newMap" "designation" "SSE"
put "newMap" "company" "My Own Company"

value=$(get "newMap" "company")
echo $value

value=$(get "newMap" "name")
echo $value

edit: This approach is actually quite a bit faster than the linear search using sed suggested by the questioner, as well as more robust (it allows keys and values to contain -, =, space, qnd ":SP:"). The fact that it uses the filesystem does not make it slow; these files are actually never guaranteed to be written to the disk unless you call sync; for temporary files like this with a short lifetime, it's not unlikely that many of them will never be written to disk.

I did a few benchmarks of Irfan's code, Jerry's modification of Irfan's code, and my code, using the following driver program:

#!/bin/sh

mapimpl=$1
numkeys=$2
numvals=$3

. ./${mapimpl}.sh    #/ <- fix broken stack overflow syntax highlighting

for (( i = 0 ; $i < $numkeys ; i += 1 ))
do
    for (( j = 0 ; $j < $numvals ; j += 1 ))
    do
        put "newMap" "key$i" "value$j"
        get "newMap" "key$i"
    done
done

The results:

    $ time ./driver.sh irfan 10 5

    real    0m0.975s
    user    0m0.280s
    sys     0m0.691s

    $ time ./driver.sh brian 10 5

    real    0m0.226s
    user    0m0.057s
    sys     0m0.123s

    $ time ./driver.sh jerry 10 5

    real    0m0.706s
    user    0m0.228s
    sys     0m0.530s

    $ time ./driver.sh irfan 100 5

    real    0m10.633s
    user    0m4.366s
    sys     0m7.127s

    $ time ./driver.sh brian 100 5

    real    0m1.682s
    user    0m0.546s
    sys     0m1.082s

    $ time ./driver.sh jerry 100 5

    real    0m9.315s
    user    0m4.565s
    sys     0m5.446s

    $ time ./driver.sh irfan 10 500

    real    1m46.197s
    user    0m44.869s
    sys     1m12.282s

    $ time ./driver.sh brian 10 500

    real    0m16.003s
    user    0m5.135s
    sys     0m10.396s

    $ time ./driver.sh jerry 10 500

    real    1m24.414s
    user    0m39.696s
    sys     0m54.834s

    $ time ./driver.sh irfan 1000 5

    real    4m25.145s
    user    3m17.286s
    sys     1m21.490s

    $ time ./driver.sh brian 1000 5

    real    0m19.442s
    user    0m5.287s
    sys     0m10.751s

    $ time ./driver.sh jerry 1000 5

    real    5m29.136s
    user    4m48.926s
    sys     0m59.336s

I normally use the killall command.

Check this link for details of this command.

You can use bash. Note for very large files in terms of GB, use awk/wc. However it should still be manageable in performance for files with a few MB.

declare -i count=0
while read
do
    ((count++))
done < file    
echo "line count: $count"

test -z returns true if the parameter is empty (see man sh or man test).

run() {
  $*
  if [ $? -ne 0 ]
  then
    echo "$* failed with exit code $?"
    return 1
  else
    return 0
  fi
}

run command1 && run command2 && run command3

I was adding a dollar sign twice in an expression with curly braces in bash:

cp -r $PROJECT_NAME ${$PROJECT_NAME}2

instead of

cp -r $PROJECT_NAME ${PROJECT_NAME}2

for executing that you must provide full path of that for example

/home/Manuel/mywrittenscript

Try this

You_command 1>output.log  2>&1

Your usage of &>x.file does work in bash4. sorry for that : (

Here comes some additional tips.

0, 1, 2...9 are file descriptors in bash.

0 stands for stdin, 1 stands for stdout, 2 stands for stderror. 3~9 is spare for any other temporary usage.

Any file descriptor can be redirected to other file descriptor or file by using operator > or >>(append).

Usage: <file_descriptor> > <filename | &file_descriptor>

Please reference to http://www.tldp.org/LDP/abs/html/io-redirection.html

curl --write-out "%{http_code}\n" --silent --output /dev/null "$URL"

works. If not, you have to hit return to view the code itself.

EDITED: I noticed that in another user's reply %idle was field 12 instead of field 11. The awk has been updated to account for the %idle field being variable.

This should get you the desired output:

mpstat | awk '$3 ~ /CPU/ { for(i=1;i<=NF;i++) { if ($i ~ /%idle/) field=i } } $3 ~ /all/ { print 100 - $field }'

If you want a simple integer rounding, you can use printf:

mpstat | awk '$3 ~ /CPU/ { for(i=1;i<=NF;i++) { if ($i ~ /%idle/) field=i } } $3 ~ /all/ { printf("%d%%",100 - $field) }'

Here's the important part from the man page:

As the list of files/directories to transfer is built, rsync checks each name to be transferred against the list of include/exclude patterns in turn, and the first matching pattern is acted on: if it is an exclude pattern, then that file is skipped; if it is an include pattern then that filename is not skipped; if no matching pattern is found, then the filename is not skipped.

To summarize:

• Not matching any pattern means a file will be copied!
• The algorithm quits once any pattern matches

Also, something ending with a slash is matching directories (like find -type d would).

Let's pull apart this answer from above.

rsync -zarv  --prune-empty-dirs --include "*/"  --include="*.sh" --exclude="*" "$from" "$to"

1. Don't skip any directories
2. Don't skip any .sh files
3. Skip everything
4. (Implicitly, don't skip anything, but the rule above prevents the default rule from ever happening.)

Finally, the --prune-empty-directories keeps the first rule from making empty directories all over the place.

if you want to read in lots of data and work on each line separately you could use something like this:

cat myFile | while read x ; do echo $x ; done

if you want to split the lines up into multiple words you can use multiple variables in place of x like this:

cat myFile | while read x y ; do echo $y $x ; done

alternatively:

while read x y ; do echo $y $x ; done < myFile

But as soon as you start to want to do anything really clever with this sort of thing you're better going for some scripting language like perl where you could try something like this:

perl -ane 'print "$F[0]\n"' < myFile

There's a fairly steep learning curve with perl (or I guess any of these languages) but you'll find it a lot easier in the long run if you want to do anything but the simplest of scripts. I'd recommend the Perl Cookbook and, of course, The Perl Programming Language by Larry Wall et al.

You actually can use sed to do it, provided it is GNU sed.

... | sed 's/match/command \0/e'

How it works:

1. Substitute match with command match
2. On substitution execute command
3. Replace substituted line with command output.

Create a bash function

split_on_commas() {
  local IFS=,
  local WORD_LIST=($1)
  for word in "${WORD_LIST[@]}"; do
    echo "$word"
  done
}

split_on_commas "this,is a,list" | while read item; do
  # Custom logic goes here
  echo Item: ${item}
done

... this generates the following output:

Item: this
Item: is a
Item: list

(Note, this answer has been updated according to some feedback)

You can use vimdiff.

Example:

vimdiff file1 file2

Remove the extension altogether and then double-click it. Most system shell scripts are like this. As long as it has a shebang it will work.

Came across this looking for something else. While the post looks fairly old, the easiest solution in bash is illustrated below (at least bash 4) using set -- "${@:#}" where # is the starting number of the array element we want to preserve forward:

    #!/bin/bash

    someVar="${1}"
    someOtherVar="${2}"
    set -- "${@:3}"
    input=${@}

    [[ "${input[*],,}" == *"someword"* ]] && someNewVar="trigger"

    echo -e "${someVar}\n${someOtherVar}\n${someNewVar}\n\n${@}"

Basically, the set -- "${@:3}" just pops off the first two elements in the array like perl's shift and preserves all remaining elements including the third. I suspect there's a way to pop off the last elements as well.

First of all, note you are not using the variable correctly:

if [ "pass_tc11" != "" ]; then
#     ^
#     missing $

Anyway, to check if a variable is empty or not you can use -z --> the string is empty:

if [ ! -z "$pass_tc11" ]; then
   echo "hi, I am not empty"
fi

or -n --> the length is non-zero:

if [ -n "$pass_tc11" ]; then
   echo "hi, I am not empty"
fi

From man test:

-z STRING

the length of STRING is zero

-n STRING

the length of STRING is nonzero

Samples:

$ [ ! -z "$var" ] && echo "yes"
$

$ var=""
$ [ ! -z "$var" ] && echo "yes"
$

$ var="a"
$ [ ! -z "$var" ] && echo "yes"
yes

$ var="a"
$ [ -n "$var" ] && echo "yes"
yes

The command I use is:

diff -qr dir1/ dir2/

It is exactly the same as Mark's :) But his answer bothered me as it uses different types of flags, and it made me look twice. Using Mark's more verbose flags it would be:

diff  --brief --recursive dir1/ dir2/

_{I apologise for posting when the other answer is perfectly acceptable. Could not stop myself... working on being less pedantic.}

Another way:

x=$'Some\nstring'
readarray -t y <<<"$x"

Or, if you don't have bash 4, the bash 3.2 equivalent:

IFS=$'\n' read -rd '' -a y <<<"$x"

You can also do it the way you were initially trying to use:

y=(${x//$'\n'/ })

This, however, will not function correctly if your string already contains spaces, such as 'line 1\nline 2'. To make it work, you need to restrict the word separator before parsing it:

IFS=$'\n' y=(${x//$'\n'/ })

...and then, since you are changing the separator, you don't need to convert the \n to space anymore, so you can simplify it to:

IFS=$'\n' y=($x)

This approach will function unless $x contains a matching globbing pattern (such as "*") - in which case it will be replaced by the matched file name(s). The read/readarray methods require newer bash versions, but work in all cases.

pip install -U pip
pip install -U cython

Where the usage of a regex can be helpful to determine if the character sequence of a date is correct, it cannot be used easily to determine if the date is valid. The following examples will pass the regular expression, but are all invalid dates: 20180231, 20190229, 20190431

So if you want to validate if your date string (let's call it datestr) is in the correct format, it is best to parse it with date and ask date to convert the string to the correct format. If both strings are identical, you have a valid format and valid date.

if [[ "$datestr" == $(date -d "$datestr" "+%Y%m%d" 2>/dev/null) ]]; then
     echo "Valid date"
else
     echo "Invalid date"
fi

Got a gotcha for those with their headspace in Pandas and moving to pyspark

 from pyspark import SparkConf, SparkContext
 from pyspark.sql import SQLContext

 spark_conf = SparkConf().setMaster("local").setAppName("MyAppName")
 sc = SparkContext(conf = spark_conf)
 sqlContext = SQLContext(sc)

 records = [
     {"colour": "red"},
     {"colour": "blue"},
     {"colour": None},
 ]

 pandas_df = pd.DataFrame.from_dict(records)
 pyspark_df = sqlContext.createDataFrame(records)

So if we wanted the rows that are not red:

pandas_df[~pandas_df["colour"].isin(["red"])]

Looking good, and in our pyspark DataFrame

pyspark_df.filter(~pyspark_df["colour"].isin(["red"])).collect()

So after some digging, I found this: https://issues.apache.org/jira/browse/SPARK-20617 So to include nothingness in our results:

pyspark_df.filter(~pyspark_df["colour"].isin(["red"]) | pyspark_df["colour"].isNull()).show()

You can use a Web Method and Ajax:

<script type="text/javascript">             //Default.aspx
   function DeleteKartItems() {     
         $.ajax({
         type: "POST",
         url: 'Default.aspx/DeleteItem',
         data: "",
         contentType: "application/json; charset=utf-8",
         dataType: "json",
         success: function (msg) {
             $("#divResult").html("success");
         },
         error: function (e) {
             $("#divResult").html("Something Wrong.");
         }
     });
   }
</script>

[WebMethod]                                 //Default.aspx.cs
public static void DeleteItem()
{
    //Your Logic
}

Here is a link that has a performance test you can run. find() is actually about 2 times faster than children().

A keystore needs a keystore file. The KeyStore class needs a FileInputStream. But if you supply null (instead of FileInputStream instance) an empty keystore will be loaded. Once you create a keystore, you can verify its integrity using keytool.

Following code creates an empty keystore with empty password

  KeyStore ks2 = KeyStore.getInstance("jks");
  ks2.load(null,"".toCharArray());
  FileOutputStream out = new FileOutputStream("C:\\mykeytore.keystore");
  ks2.store(out, "".toCharArray());

Once you have the keystore, importing certificate is very easy. Checkout this link for the sample code.

Every Set has an iterator(). A normal HashSet's iterator is quite random, a TreeSet does it by sort order, a LinkedHashSet iterator iterates by insert order.

You can't replace an element in a LinkedHashSet, however. You can remove one and add another, but the new element will not be in the place of the original. In a LinkedHashMap, you can replace a value for an existing key, and then the values will still be in the original order.

Also, you can't insert at a certain position.

Maybe you'd better use an ArrayList with an explicit check to avoid inserting duplicates.

Simple solution:

array_unique($array, SORT_REGULAR)

You could just pass a static value (or a variable from *ngFor or whatever)

<button (click)="toggle(1)" class="someclass">
<button (click)="toggle(2)" class="someclass">

Clean Build folder + Build

will clear any error you may have even after fixing your code.

I don't think your question is very clear, this code assumes that if you're going to include the -domain parameter, it's always 'named' (i.e. dostuff computername arg2 -domain domain); this also makes the computername parameter mandatory.

Function DoStuff(){
    param(
        [Parameter(Mandatory=$true)][string]$computername,
        [Parameter(Mandatory=$false)][string]$arg2,
        [Parameter(Mandatory=$false)][string]$domain
    )
    if(!($domain)){
        $domain = 'domain1'
    }
    write-host $domain
    if($arg2){
        write-host "arg2 present... executing script block"
    }
    else{
        write-host "arg2 missing... exiting or whatever"
    }
}

You can use

text.replace('old', 'new')

And to change multiple values in one string at once, for example to change # to string v and _ to string w:

text.replace(/#|_/g,function(match) {return (match=="#")? v: w;});

What about x *= -1; ? Do you really want a library function for this?

make a parent div, in css make it float:right then make the child div's position fixed this will make the div stay in its position at all times and on the right

Take a look at http://dev.mysql.com/doc/refman/5.0/en/declare-handler.html

Basically you declare error handler which will call rollback

START TRANSACTION;

DECLARE EXIT HANDLER FOR SQLEXCEPTION 
    BEGIN
        ROLLBACK;
        EXIT PROCEDURE;
    END;
COMMIT;

With recent Bash (version = 4.2), you can use the builtin printf with the format modifier %(strftime_format)T:

$ printf '%(%Y-%m-%d)T\n' -1  # Get YYYY-MM-DD (-1 stands for "current time")
2017-11-10
$ printf '%(%F)T\n' -1  # Synonym of the above
2017-11-10
$ printf -v date '%(%F)T' -1  # Capture as var $date

printf is much faster than date since it's a Bash builtin while date is an external command.

As well, printf -v date ... is faster than date=$(printf ...) since it doesn't require forking a subshell.

In recent Git (I'm using v2.15.1), the following will merge upstream submodule changes into the submodules recursively:

git submodule update --recursive --remote --merge

You may add --init to initialize any uninitialized submodules and use --rebase if you want to rebase instead of merge.

You need to commit the changes afterwards:

git add . && git commit -m 'Update submodules to latest revisions'

It's to execute a second statement if the first statement ends succesfully. Like an if statement:

 if (1 == 1 && 2 == 2)
  echo "test;"

Its first tries if 1==1, if that is true it checks if 2==2

For anyone learning this stuff, comments are more important, so drawing on Xak Tacit's idea
(from User500099's link) for Single Property comments, add this to the top of the XAML code block:

<!--Comments Allowed With Markup Compatibility (mc) In XAML!
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:ØignoreØ="http://www.galasoft.ch/ignore"
    mc:Ignorable="ØignoreØ"
    Usage in property:
ØignoreØ:AttributeToIgnore="Text Of AttributeToIgnore"-->

Then in the code block

<Application FooApp:Class="Foo.App"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ØignoreØ="http://www.galasoft.ch/ignore"
mc:Ignorable="ØignoreØ"
...

AttributeNotToIgnore="TextNotToIgnore"
...

...
ØignoreØ:IgnoreThisAttribute="IgnoreThatText"
...   
>
</Application>

Right click on package or Res folder click on new on popup then click on android resource directory

a new window will be appear change the resource type to raw and hit OK copy and past song to raw folder remember don't drag and drop song file to raw folder and song spell should be in lower case! This method is for Android Studio Also Check MY Link

here :

http://jsbin.com/ucuqot/3/edit

function findXX(word)
{  
  $.each(someArray, function(i,n)
  {
    $('body').append('-> '+i+'<br />');
    if(n == word)
    {
      return false;
    }   
  });  
}

A pivot is used to convert one of the columns in your data set from rows into columns (this is typically referred to as the spreading column). In the example you have given, this means converting the PhaseID rows into a set of columns, where there is one column for each distinct value that PhaseID can contain - 1, 5 and 6 in this case.

These pivoted values are grouped via the ElementID column in the example that you have given.

Typically you also then need to provide some form of aggregation that gives you the values referenced by the intersection of the spreading value (PhaseID) and the grouping value (ElementID). Although in the example given the aggregation that will be used is unclear, but involves the Effort column.

Once this pivoting is done, the grouping and spreading columns are used to find an aggregation value. Or in your case, ElementID and PhaseIDX lookup Effort.

Using the grouping, spreading, aggregation terminology you will typically see example syntax for a pivot as:

WITH PivotData AS
(
    SELECT <grouping column>
        , <spreading column>
        , <aggregation column>
    FROM <source table>
)
SELECT <grouping column>, <distinct spreading values>
FROM PivotData
    PIVOT (<aggregation function>(<aggregation column>)
        FOR <spreading column> IN <distinct spreading values>));

This gives a graphical explanation of how the grouping, spreading and aggregation columns convert from the source to pivoted tables if that helps further.

You can do this perfectly in pure Javascript, simple and no library required. Here it is my detailed answer for a similar topic: Disabling enter key for form

In short, here is the code:

<script type="text/javascript">
window.addEventListener('keydown',function(e){if(e.keyIdentifier=='U+000A'||e.keyIdentifier=='Enter'||e.keyCode==13){if(e.target.nodeName=='INPUT'&&e.target.type=='text'){e.preventDefault();return false;}}},true);
</script>

This code is to prevent "Enter" key for input type='text' only. (Because the visitor might need to hit enter across the page) If you want to disable "Enter" for other actions as well, you can add console.log(e); for your your test purposes, and hit F12 in chrome, go to "console" tab and hit "backspace" on the page and look inside it to see what values are returned, then you can target all of those parameters to further enhance the code above to suit your needs for "e.target.nodeName", "e.target.type" and many more...

setup.py is designed to be run from the command line. You'll need to open your command prompt (In Windows 7, hold down shift while right-clicking in the directory with the setup.py file. You should be able to select "Open Command Window Here").

From the command line, you can type

python setup.py --help

...to get a list of commands. What you are looking to do is...

python setup.py install

Try using the WHERE clause:

SELECT column1 FROM table WHERE Isnumeric(column1);

You're getting final 0 because your while loop is being executed in a sub (shell) process and any changes made there are not reflected in the current (parent) shell.

Correct script:

while read -r country _; do
  if [ "US" = "$country" ]; then
        ((USCOUNTER++))
        echo "US counter $USCOUNTER"
  fi
done < "$FILE"

server.error.whitelabel.enabled=false

Include the above line to the Resources folders application.properties

More Error Issue resolve please refer http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#howto-customize-the-whitelabel-error-page

well, why don't you (get rid of sidebar and) squeeze the table so it is without show/hide effect? It looks odd to me now. The table is too robust.
Otherwise I think scunliffe's suggestion should do it. Or if you wish, you can just set the exact width of table and set either percentage or pixel width for table cells.

A popular desktop architecture divides a process's virtual memory in several segments:

• Text segment: contains the executable code. The instruction pointer takes values in this range.

• Data segment: contains global variables (i.e. objects with static linkage). Subdivided in read-only data (such as string constants) and uninitialized data ("BSS").

• Stack segment: contains the dynamic memory for the program, i.e. the free store ("heap") and the local stack frames for all the threads. Traditionally the C stack and C heap used to grow into the stack segment from opposite ends, but I believe that practice has been abandoned because it is too unsafe.

A C program typically puts objects with static storage duration into the data segment, dynamically allocated objects on the free store, and automatic objects on the call stack of the thread in which it lives.

On other platforms, such as old x86 real mode or on embedded devices, things can obviously be radically different.

I got to your case using Bootstrap. This is the simplest solution that works:

select.form-control {_x000D_
    -moz-appearance: none;_x000D_
    -webkit-appearance: none;_x000D_
    appearance: none;_x000D_
    background-position: right center;_x000D_
    background-repeat: no-repeat;_x000D_
    background-size: 1ex;_x000D_
    background-origin: content-box;_x000D_
    background-image: url("data:image/svg+xml;base64,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");_x000D_
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />_x000D_
<section class="container">_x000D_
  <form class="form-horizontal">_x000D_
    <select class="form-control">_x000D_
      <option>One</option>_x000D_
      <option>Two</option>_x000D_
    </select>_x000D_
  </form>_x000D_
</section>

Note: the base64 stuff is fa-chevron-down in SVG.

Fall-through is really a handy thing, depending on what you're doing. Consider this neat and understandable way to arrange options:

switch ($someoption) {
  case 'a':
  case 'b':
  case 'c':
    // Do something
    break;

  case 'd':
  case 'e':
    // Do something else
    break;
}

Imagine doing this with if/else. It would be a mess.

The website was running fine then suddenly it started to display this same error 404 message (The origin server did not find a current representation for the target resource or is not willing to disclose that one exists), Perhaps because of switching servers back and forward from Tomcat 9 to 8 and 7

In my case, i only had to update the project which was causing this error then restart the specific tomcat version. You may also need to Maven Clean and Maven Install after the "Maven Update Project"

FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
WindowState = FormWindowState.Maximized;

It is purely a string:

startInfo.Arguments = "-sk server -sky exchange -pe -n CN=localhost -ir LocalMachine -is Root -ic MyCA.cer -sr LocalMachine -ss My MyAdHocTestCert.cer"

Of course, when arguments contain whitespaces you'll have to escape them using \" \", like:

"... -ss \"My MyAdHocTestCert.cer\""

See MSDN for this.

Another option if you don't have Python 2.6:

import commands
n = commands.getoutput("grep -c processor /proc/cpuinfo")

It can be as follows:

UPDATE A 
SET A.`id` = (SELECT id from B WHERE A.title = B.title)

You can find === and !== operators in several other dynamically-typed languages as well. It always means that the two values are not only compared by their "implied" value (i.e. either or both values might get converted to make them comparable), but also by their original type.

That basically means that if 0 == "0" returns true, 0 === "0" will return false because you are comparing a number and a string. Similarly, while 0 != "0" returns false, 0 !== "0" returns true.

1. Build project in Release Mode.
2. Copy all Release folder files to source path.
3. Execute Window service using command prompt window in administrative access.
4. Never delete files from source path.

At lease this works for me.

import java.util.Scanner;
import java.util.Timer;
import java.util.TimerTask;

public class Stopwatch {
static int interval;
static Timer timer;

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.print("Input seconds => : ");
    String secs = sc.nextLine();
    int delay = 1000;
    int period = 1000;
    timer = new Timer();
    interval = Integer.parseInt(secs);
    System.out.println(secs);
    timer.scheduleAtFixedRate(new TimerTask() {

        public void run() {
            System.out.println(setInterval());

        }
    }, delay, period);
}

private static final int setInterval() {
    if (interval == 1)
        timer.cancel();
    return --interval;
}
}

Try this.

It looks like you want to define Truck as a Class with properties NumberOfAxles, AxleWeights & AxleSpacings.

This can be defined in a CLASS MODULE (here named clsTrucks)

Option Explicit

Private tID As String
Private tNumberOfAxles As Double
Private tAxleSpacings As Double


Public Property Get truckID() As String
    truckID = tID
End Property

Public Property Let truckID(value As String)
    tID = value
End Property

Public Property Get truckNumberOfAxles() As Double
    truckNumberOfAxles = tNumberOfAxles
End Property

Public Property Let truckNumberOfAxles(value As Double)
    tNumberOfAxles = value
End Property

Public Property Get truckAxleSpacings() As Double
    truckAxleSpacings = tAxleSpacings
End Property

Public Property Let truckAxleSpacings(value As Double)
    tAxleSpacings = value
End Property

then in a MODULE the following defines a new truck and it's properties and adds it to a collection of trucks and then retrieves the collection.

Option Explicit

Public TruckCollection As New Collection

Sub DefineNewTruck()
Dim tempTruck As clsTrucks
Dim i As Long

    'Add 5 trucks
    For i = 1 To 5
        Set tempTruck = New clsTrucks
        'Random data
        tempTruck.truckID = "Truck" & i
        tempTruck.truckAxleSpacings = 13.5 + i
        tempTruck.truckNumberOfAxles = 20.5 + i

        'tempTruck.truckID is the collection key
        TruckCollection.Add tempTruck, tempTruck.truckID
    Next i

    'retrieve 5 trucks
    For i = 1 To 5
        'retrieve by collection index
        Debug.Print TruckCollection(i).truckAxleSpacings
        'retrieve by key
        Debug.Print TruckCollection("Truck" & i).truckAxleSpacings

    Next i

End Sub

There are several ways of doing this so it really depends on how you intend to use the data as to whether an a class/collection is the best setup or arrays/dictionaries etc.

The core problem is the js errors:

$('#purpose').on('change', function () {
    // if (this.value == '1'); { No semicolon and I used === instead of ==
    if (this.value === '1'){
        $("#business").show();
    } else {
        $("#business").hide();
    }
});
// }); remove

http://jsfiddle.net/Bushwazi/2kGzZ/3/

I had to clean up the html & js...I couldn't help myself.

HTML:

<select id='purpose'>
    <option value="0">Personal use</option>
    <option value="1">Business use</option>
    <option value="2">Passing on to a client</option>
</select>
<form id="business">
    <label for="business">Business Name</label>
    <input type='text' class='text' name='business' value size='20' />
</form>

CSS:

#business {
  display:none;
}

JS:

$('#purpose').on('change', function () {
    if(this.value === "1"){
        $("#business").show();
    } else {
        $("#business").hide();
    }
});

Just in case. Make sure you load the IE specific js files after you load your css files.

This worked best for me:

<div class="card bg-light p-3">
 <p class="mb-0">Some text here</p>
</div>

What is your Compatibility Level set to? If it's 90, it's working as designed. See this article.

In any case, why not just insert directly into the table?

<form method="get" id="form1" action="something.php">

</form>

<!-- External button-->
<button type="submit" form="form1">Click me!</button>

This worked for me, to have a remote submit button for a form.

The problem seems to happen when you have an alias the same name as the objects property. Hibernate seems to pick up the alias and use it in the sql. I found this documented here and here, and I believe it to be a bug in Hibernate, although I am not sure that the Hibernate team agrees.

Either way, I have found a simple work around that works in my case. Your mileage may vary. The details are below, I tried to simplify the code for this sample so I apologize for any errors or typo's:

Criteria criteria = session.createCriteria(MyClass.class)
    .setProjection(Projections.projectionList()
        .add(Projections.property("sectionHeader"), "sectionHeader")
        .add(Projections.property("subSectionHeader"), "subSectionHeader")
        .add(Projections.property("sectionNumber"), "sectionNumber"))
    .add(Restrictions.ilike("sectionHeader", sectionHeaderVar)) // <- Problem!
    .setResultTransformer(Transformers.aliasToBean(MyDTO.class));

Would produce this sql:

select
    this_.SECTION_HEADER as y1_,
    this_.SUB_SECTION_HEADER as y2_,
    this_.SECTION_NUMBER as y3_,
from
    MY_TABLE this_ 
where
    ( lower(y1_) like ? ) 

Which was causing an error: java.sql.SQLException: ORA-00904: "Y1_": invalid identifier

But, when I changed my restriction to use "this", like so:

Criteria criteria = session.createCriteria(MyClass.class)
    .setProjection(Projections.projectionList()
        .add(Projections.property("sectionHeader"), "sectionHeader")
        .add(Projections.property("subSectionHeader"), "subSectionHeader")
        .add(Projections.property("sectionNumber"), "sectionNumber"))
    .add(Restrictions.ilike("this.sectionHeader", sectionHeaderVar)) // <- Problem Solved!
    .setResultTransformer(Transformers.aliasToBean(MyDTO.class));

It produced the following sql and my problem was solved.

select
    this_.SECTION_HEADER as y1_,
    this_.SUB_SECTION_HEADER as y2_,
    this_.SECTION_NUMBER as y3_,
from
    MY_TABLE this_ 
where
    ( lower(this_.SECTION_HEADER) like ? ) 

Thats, it! A pretty simple fix to a painful problem. I don't know how this fix would translate to the query by example problem, but it may get you closer.

Server side

@RequestMapping("/download")
public byte[] download() throws Exception {
    File f = new File("C:\\WorkSpace\\Text\\myDoc.txt");
     byte[] byteArray = new byte[(int) f.length()];
        byteArray = FileUtils.readFileToByteArray(f);
        return byteArray;
}

Client side

private ResponseEntity<byte[]> getDownload(){
    URI end = URI.create(your url which server has exposed i.e. bla 
              bla/download);
    return rest.getForEntity(end,byte[].class);

}

public static void main(String[] args) throws Exception {


    byte[] byteArray = new TestClient().getDownload().getBody();
    FileOutputStream fos = new 
    FileOutputStream("C:\\WorkSpace\\testClient\\abc.txt");

     fos.write(byteArray);
     fos.close(); 
     System.out.println("file written successfully..");


}

Also internationalization.

I fooled around with this some a while back. Did this in my model:

[Display(Name = "XXX", ResourceType = typeof(Labels))]

I had a separate class library for all the resources, so I had Labels.resx, Labels.culture.resx, etc.

In there I had key = XXX, value = "meaningful string in that culture."

You can try this:

var driveName = "C:\\";
var freeSpace = DriveInfo.GetDrives().Where(x => x.Name == driveName && x.IsReady).FirstOrDefault().TotalFreeSpace;

Good luck

The first option's text will always display as default title.

   <select>
        <option value ="">What is the name of your city?</option>
        <option value ="sydney">Sydney</option>
        <option value ="melbourne">Melbourne</option>
        <option value ="cromwell">Cromwell</option>
        <option value ="queenstown">Queenstown</option>
   </select>

If you saw 404 even everything looks right, try switching https/http.

The original question has the url wrong, usually you can check repo settings and found the correct url for generated site.

However I have everything set up correctly, and the setting page said it's published, then I still saw 404.

Thanks for the comment of @Rohit Suthar (though that comment was to use https), I changed the url to http and it worked, then https worked too.

You're missing *s in the last two terms of your expression, so R is interpreting (e.g.) 0.207 (log(DIAM93))^2 as an attempt to call a function named 0.207 ...

For example:

> 1 + 2*(3)
[1] 7
> 1 + 2 (3)

Error: attempt to apply non-function

Your (unreproducible) expression should read:

censusdata_20$AGB93 = WD * exp(-1.239 + 1.980 * log (DIAM93) + 
                              0.207* (log(DIAM93))^2  -
                              0.0281*(log(DIAM93))^3)

Mathematica is the only computer system I know of that allows juxtaposition to be used for multiplication ...

SELECT * FROM items WHERE `items.xml` LIKE '%123456%'

The % operator in LIKE means "anything can be here".

Gradle is in offline mode, which means that it won't go to the network to resolve dependencies.

Go to Preferences > Gradle and uncheck "Offline work".

This is very simple and straight forward. Look at the code. Try to grasp the basic concept behind javascript extension.

First let us extend javascript function.

function Base(props) {
    const _props = props
    this.getProps = () => _props

    // We can make method private by not binding it to this object. 
    // Hence it is not exposed when we return this.
    const privateMethod = () => "do internal stuff" 

    return this
}

You can extend this function by creating child function in following way

function Child(props) {
    const parent = Base(props)
    this.getMessage = () => `Message is ${parent.getProps()}`;

    // You can remove the line below to extend as in private inheritance, 
    // not exposing parent function properties and method.
    this.prototype = parent
    return this
}

Now you can use Child function as follows,

let childObject = Child("Secret Message")
console.log(childObject.getMessage())     // logs "Message is Secret Message"
console.log(childObject.getProps())       // logs "Secret Message"

We can also create Javascript Function by extending Javascript classes, like this.

class BaseClass {
    constructor(props) {
        this.props = props
        // You can remove the line below to make getProps method private. 
        // As it will not be binded to this, but let it be
        this.getProps = this.getProps.bind(this)
    }

    getProps() {
        return this.props
    }
}

Let us extend this class with Child function like this,

function Child(props) {
    let parent = new BaseClass(props)
    const getMessage = () => `Message is ${parent.getProps()}`;
    return { ...parent, getMessage} // I have used spread operator. 
}

Again you can use Child function as follows to get similar result,

let childObject = Child("Secret Message")
console.log(childObject.getMessage())     // logs "Message is Secret Message"
console.log(childObject.getProps())       // logs "Secret Message"

Javascript is very easy language. We can do almost anything. Happy JavaScripting... Hope I was able to give you an idea to use in your case.

Guzzle implements PSR-7. That means that it will by default store the body of a message in a Stream that uses PHP temp streams. To retrieve all the data, you can use casting operator:

$contents = (string) $response->getBody();

You can also do it with

$contents = $response->getBody()->getContents();

The difference between the two approaches is that getContents returns the remaining contents, so that a second call returns nothing unless you seek the position of the stream with rewind or seek .

$stream = $response->getBody();
$contents = $stream->getContents(); // returns all the contents
$contents = $stream->getContents(); // empty string
$stream->rewind(); // Seek to the beginning
$contents = $stream->getContents(); // returns all the contents

Instead, usings PHP's string casting operations, it will reads all the data from the stream from the beginning until the end is reached.

$contents = (string) $response->getBody(); // returns all the contents
$contents = (string) $response->getBody(); // returns all the contents

Documentation: http://docs.guzzlephp.org/en/latest/psr7.html#responses

You can remove all constraints in a view by doing this:

self.removeConstraints(self.constraints)

EDIT: To remove the constraints of all subviews, use the following extension in Swift:

extension UIView {
    func clearConstraints() {
        for subview in self.subviews {
            subview.clearConstraints()
        }
        self.removeConstraints(self.constraints)
    }
}

The compiler may add padding for alignment requirements. Note that this applies not only to padding between the fields of a struct, but also may apply to the end of the struct (so that arrays of the structure type will have each element properly aligned).

For example:

struct foo_t {
    int x;
    char c;
};

Even though the c field doesn't need padding, the struct will generally have a sizeof(struct foo_t) == 8 (on a 32-bit system - rather a system with a 32-bit int type) because there will need to be 3 bytes of padding after the c field.

Note that the padding might not be required by the system (like x86 or Cortex M3) but compilers might still add it for performance reasons.

To create a new branch (locally):

• With the commit hash (or part of it)

  git checkout -b new_branch 6e559cb
  

• or to go back 4 commits from HEAD

  git checkout -b new_branch HEAD~4
  

Once your new branch is created (locally), you might want to replicate this change on a remote of the same name: How can I push my changes to a remote branch

For discarding the last three commits, see Lunaryorn's answer below.

For moving your current branch HEAD to the specified commit without creating a new branch, see Arpiagar's answer below.

f.write(plaintext)
f.write("\n".encode("utf-8"))

Unless there is a reason that you want to keep that private/public key pair (id_rsa/id_rsa.pub), or enjoy banging your head on the wall, I'd recommend just recreating them and updating your public key on github.

Start by making a backup copy of your ~/.ssh directory.

Enter the following and respond "y" to whether you want to over write the existing files.

ssh-keygen -t rsa

Copy the contents of the public key to your clipboard. (Below is how you should do it on a Mac).

cat ~/.ssh/id_rsa.pub | pbcopy

Go to your account on github and add this key.

Name: My new public key
Key: <PASTE>

Exit from your terminal and restart a new one.

If you get senseless error messages like "Enter your password" for your public key when you never entered one, consider this start over technique. As you see above, it's not complicated.

On Mac/unix and Windows:

ssh-keygen then follow the prompts. It will ask you for a name to the file (say you call it pubkey, for example). Right away, you should have your key fingerprint and your key's randomart image visible to you.

Then just use your favourite text editor and enter command vim pubkey.pub and it (your ssh-rsa key) should be there.

Replace vim with emacs or whatever other editor you have/prefer.

Here is another method using MVC tools which you can handle requests to bad controller names, bad route names, and any other criteria you see fit inside of an Action method. Personally, I prefer to avoid as many web.config settings as possible, because they do the 302 / 200 redirect and do not support ResponseRewrite (Server.Transfer) using Razor views. I'd prefer to return a 404 with a custom error page for SEO reasons.

Some of this is new take on cottsak's technique above.

This solution also uses minimal web.config settings favoring the MVC 3 Error Filters instead.

Usage

Just throw a HttpException from an action or custom ActionFilterAttribute.

Throw New HttpException(HttpStatusCode.NotFound, "[Custom Exception Message Here]")

Step 1

Add the following setting to your web.config. This is required to use MVC's HandleErrorAttribute.

<customErrors mode="On" redirectMode="ResponseRedirect" />

Step 2

Add a custom HandleHttpErrorAttribute similar to the MVC framework's HandleErrorAttribute, except for HTTP errors:

<AttributeUsage(AttributeTargets.All, AllowMultiple:=True)>
Public Class HandleHttpErrorAttribute
    Inherits FilterAttribute
    Implements IExceptionFilter

    Private Const m_DefaultViewFormat As String = "ErrorHttp{0}"

    Private m_HttpCode As HttpStatusCode
    Private m_Master As String
    Private m_View As String

    Public Property HttpCode As HttpStatusCode
        Get
            If m_HttpCode = 0 Then
                Return HttpStatusCode.NotFound
            End If
            Return m_HttpCode
        End Get
        Set(value As HttpStatusCode)
            m_HttpCode = value
        End Set
    End Property

    Public Property Master As String
        Get
            Return If(m_Master, String.Empty)
        End Get
        Set(value As String)
            m_Master = value
        End Set
    End Property

    Public Property View As String
        Get
            If String.IsNullOrEmpty(m_View) Then
                Return String.Format(m_DefaultViewFormat, Me.HttpCode)
            End If
            Return m_View
        End Get
        Set(value As String)
            m_View = value
        End Set
    End Property

    Public Sub OnException(filterContext As System.Web.Mvc.ExceptionContext) Implements System.Web.Mvc.IExceptionFilter.OnException
        If filterContext Is Nothing Then Throw New ArgumentException("filterContext")

        If filterContext.IsChildAction Then
            Return
        End If

        If filterContext.ExceptionHandled OrElse Not filterContext.HttpContext.IsCustomErrorEnabled Then
            Return
        End If

        Dim ex As HttpException = TryCast(filterContext.Exception, HttpException)
        If ex Is Nothing OrElse ex.GetHttpCode = HttpStatusCode.InternalServerError Then
            Return
        End If

        If ex.GetHttpCode <> Me.HttpCode Then
            Return
        End If

        Dim controllerName As String = filterContext.RouteData.Values("controller")
        Dim actionName As String = filterContext.RouteData.Values("action")
        Dim model As New HandleErrorInfo(filterContext.Exception, controllerName, actionName)

        filterContext.Result = New ViewResult With {
            .ViewName = Me.View,
            .MasterName = Me.Master,
            .ViewData = New ViewDataDictionary(Of HandleErrorInfo)(model),
            .TempData = filterContext.Controller.TempData
        }
        filterContext.ExceptionHandled = True
        filterContext.HttpContext.Response.Clear()
        filterContext.HttpContext.Response.StatusCode = Me.HttpCode
        filterContext.HttpContext.Response.TrySkipIisCustomErrors = True
    End Sub
End Class

Step 3

Add Filters to the GlobalFilterCollection (GlobalFilters.Filters) in Global.asax. This example will route all InternalServerError (500) errors to the Error shared view (Views/Shared/Error.vbhtml). NotFound (404) errors will be sent to ErrorHttp404.vbhtml in the shared views as well. I've added a 401 error here to show you how this can be extended for additional HTTP error codes. Note that these must be shared views, and they all use the System.Web.Mvc.HandleErrorInfo object as a the model.

filters.Add(New HandleHttpErrorAttribute With {.View = "ErrorHttp401", .HttpCode = HttpStatusCode.Unauthorized})
filters.Add(New HandleHttpErrorAttribute With {.View = "ErrorHttp404", .HttpCode = HttpStatusCode.NotFound})
filters.Add(New HandleErrorAttribute With {.View = "Error"})

Step 4

Create a base controller class and inherit from it in your controllers. This step allows us to handle unknown action names and raise the HTTP 404 error to our HandleHttpErrorAttribute.

Public Class BaseController
    Inherits System.Web.Mvc.Controller

    Protected Overrides Sub HandleUnknownAction(actionName As String)
        Me.ActionInvoker.InvokeAction(Me.ControllerContext, "Unknown")
    End Sub

    Public Function Unknown() As ActionResult
        Throw New HttpException(HttpStatusCode.NotFound, "The specified controller or action does not exist.")
        Return New EmptyResult
    End Function
End Class

Step 5

Create a ControllerFactory override, and override it in your Global.asax file in Application_Start. This step allows us to raise the HTTP 404 exception when an invalid controller name has been specified.

Public Class MyControllerFactory
    Inherits DefaultControllerFactory

    Protected Overrides Function GetControllerInstance(requestContext As System.Web.Routing.RequestContext, controllerType As System.Type) As System.Web.Mvc.IController
        Try
            Return MyBase.GetControllerInstance(requestContext, controllerType)
        Catch ex As HttpException
            Return DependencyResolver.Current.GetService(Of BaseController)()
        End Try
    End Function
End Class

'In Global.asax.vb Application_Start:

controllerBuilder.Current.SetControllerFactory(New MyControllerFactory)

Step 6

Include a special route in your RoutTable.Routes for the BaseController Unknown action. This will help us raise a 404 in the case where a user accesses an unknown controller, or unknown action.

'BaseController
routes.MapRoute( _
    "Unknown", "BaseController/{action}/{id}", _
    New With {.controller = "BaseController", .action = "Unknown", .id = UrlParameter.Optional} _
)

Summary

This example demonstrated how one can use the MVC framework to return 404 Http Error Codes to the browser without a redirect using filter attributes and shared error views. It also demonstrates showing the same custom error page when invalid controller names and action names are specified.

I'll add a screenshot of an invalid controller name, action name, and a custom 404 raised from the Home/TriggerNotFound action if I get enough votes to post one =). Fiddler returns a 404 message when I access the following URLs using this solution:

/InvalidController
/Home/InvalidRoute
/InvalidController/InvalidRoute
/Home/TriggerNotFound

cottsak's post above and these articles were good references.

• Problems using CustomErrors redirectMode=ResponseRewrite
• Elmah + MVC HandleErrorAttribute

My favorite way:

Imports System.Runtime.CompilerServices

<Extension()> _
Public Sub RemoveAll(Of T)(ByRef arr As T(), matching As Predicate(Of T))
    If Not IsNothing(arr) Then
        If arr.Count > 0 Then
            Dim ls As List(Of T) = arr.ToList
            ls.RemoveAll(matching)
            arr = ls.ToArray
        End If
    End If
End Sub

Then in the code, whenever I need to remove something from an array I can do it by some property in some object in that array having a certain value, like:

arr.RemoveAll(Function(c) c.MasterContactID.Equals(customer.MasterContactID))

Or if I already know the exact object I want to remove, I can just do:

arr.RemoveAll(function(c) c.equals(customer))

Swift 4

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
    // your function here
}

Swift 3

DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(0.1)) {
    // your function here
}

Swift 2

let dispatchTime: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(0.1 * Double(NSEC_PER_SEC))) 
dispatch_after(dispatchTime, dispatch_get_main_queue(), { 
    // your function here 
})

Have you tried:

$("#iFrameId").on("load", function () {
    // do something once the iframe is loaded
});

Update July 1st 2019

docker-compose logs <name-of-service>

From the documentation:

Usage: logs [options] [SERVICE...]

Options:

--no-color Produce monochrome output.

-f, --follow Follow log output.

-t, --timestamps Show timestamps.

--tail="all" Number of lines to show from the end of the logs for each container.

See docker logs

You can start Docker compose in detached mode and attach yourself to the logs of all container later. If you're done watching logs you can detach yourself from the logs output without shutting down your services.

1. Use docker-compose up -d to start all services in detached mode (-d) (you won't see any logs in detached mode)
2. Use docker-compose logs -f -t to attach yourself to the logs of all running services, whereas -f means you follow the log output and the -t option gives you timestamps (See Docker reference)
3. Use Ctrl + z or Ctrl + c to detach yourself from the log output without shutting down your running containers

If you're interested in logs of a single container you can use the docker keyword instead:

1. Use docker logs -t -f <name-of-service>

Save the output

To save the output to a file you add the following to your logs command:

1. docker-compose logs -f -t >> myDockerCompose.log

Minimal attack example that would be prevented: CSRF

On my website evil.com I convince you to submit the following form:

<form action="http://bank.com/transfer" method="post">
  <p><input type="hidden" name="to"      value="ciro"></p>
  <p><input type="hidden" name="ammount" value="100"></p>
  <p><button type="submit">CLICK TO GET PRIZE!!!</button></p>
</form>

If you are logged into your bank through session cookies, then the cookies would be sent and the transfer would be made without you even knowing it.

That is were the CSRF token comes into play:

• with the GET response that that returned the form, Rails sends a very long random hidden parameter
• when the browser makes the POST request, it will send the parameter along, and the server will only accept it if it matches

So the form on an authentic browser would look like:

<form action="http://bank.com/transfer" method="post">
  <p><input type="hidden" name="authenticity_token" value="j/DcoJ2VZvr7vdf8CHKsvjdlDbmiizaOb5B8DMALg6s=" ></p>
  <p><input type="hidden" name="to"                 value="ciro"></p>
  <p><input type="hidden" name="ammount"            value="100"></p>
  <p><button type="submit">Send 100$ to Ciro.</button></p>
</form>

Thus, my attack would fail, since it was not sending the authenticity_token parameter, and there is no way I could have guessed it since it is a huge random number.

This prevention technique is called Synchronizer Token Pattern.

Same Origin Policy

But what if the attacker made two requests with JavaScript, one to read the token, and the second one to make the transfer?

The synchronizer token pattern alone is not enough to prevent that!

This is where the Same Origin Policy comes to the rescue, as I have explained at: https://security.stackexchange.com/questions/8264/why-is-the-same-origin-policy-so-important/72569#72569

How Rails sends the tokens

Covered at: Rails: How Does csrf_meta_tag Work?

Basically:

• HTML helpers like form_tag add a hidden field to the form for you if it's not a GET form

• AJAX is dealt with automatically by jquery-ujs, which reads the token from the meta elements added to your header by csrf_meta_tags (present in the default template), and adds it to any request made.

  uJS also tries to update the token in forms in outdated cached fragments.

Other prevention approaches

• check if certain headers is present e.g. X-Requested-With:
  • What's the point of the X-Requested-With header?
  • https://security.stackexchange.com/questions/23371/csrf-protection-with-custom-headers-and-without-validating-token
  • Is an X-Requested-With header server check sufficient to protect against a CSRF for an ajax-driven application?
• check the value of the Origin header: https://security.stackexchange.com/questions/91165/why-is-the-synchronizer-token-pattern-preferred-over-the-origin-header-check-to
• re-authentication: ask user for password again. This should be done for every critical operation (bank login and money transfers, password changes in most websites), in case your site ever gets XSSed. The downside is that the user has to type the password multiple times, which is tiresome, and increases the chances of keylogging / shoulder surfing.

Variables can contain single quotes.

myvar=\'....$variable\'

repo forall -c $myvar

You have to use HorizontalContentAlignment="Center" and! Width="Auto".

Similar issue:

I gave passphrase when Git-cloned using SSH URL for git.
So this error now shows up, each time I opened VS Code on Windows 10

Below fixed the issue:

1 . Run the below command in CMD

setx SSH_ASKPASS "C:\Program Files\Git\mingw64\libexec\git-core\git-gui--askpass"
setx DISPLAY needs-to-be-defined

2 . Exit CMD & VS Code

3 . Reopen VS Code

4 . VS Code now shows a popup dialog where we can enter passpharse

Above commands are for Windows OS, similar instructions will work for Linux/MAC.

I got the same error message (Eclipse Enterprise 2020-06, Tomcat 8.5, dynamic web project), even after I downloaded version 1.2.5 of the jst library (here), dropped it into the "WEB-INF/lib" folder and added <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> to the very top of the jsp file.

Using version 1.2 (here) instead fixed it.

These examples are from php.net. Thanks to you, I also just learned about the new php hashing functions.

Read the php documentation to find out about the possibilities and best practices: http://www.php.net/manual/en/function.password-hash.php

Save a password hash:

$options = [
    'cost' => 11,
];
// Get the password from post
$passwordFromPost = $_POST['password'];

$hash = password_hash($passwordFromPost, PASSWORD_BCRYPT, $options);

// Now insert it (with login or whatever) into your database, use mysqli or pdo!

Get the password hash:

// Get the password from the database and compare it to a variable (for example post)
$passwordFromPost = $_POST['password'];
$hashedPasswordFromDB = ...;

if (password_verify($passwordFromPost, $hashedPasswordFromDB)) {
    echo 'Password is valid!';
} else {
    echo 'Invalid password.';
}

My work uses Winnovative's PDF generator (We've used it mainly to convert HTML to PDF, but you can generate it other ways as well)

             if (reader.HasRows)
            {
                while (reader.Read())
                {
                    comboBox1.Items.Add(reader.GetString(0));
                }
            }
            reader.Close();

            MySqlDataReader reader1 = cmd1.ExecuteReader();
            if (reader1.HasRows)
            {
                while (reader1.Read())
                {
                    listBox1.Items.Add(reader1.GetString(0));
                }
            }
            reader1.Close();

ManyToManyField isn`t a good choice.You can use some snippets to implement MultipleChoiceField.You can be inspired by MultiSelectField with comma separated values (Field + FormField) But it has some bug in it.And you can install django-multiselectfield.This is more prefect.

For slice(start, stop), if stop is negative, stop will be set to:

string.length – Math.abs(stop)

rather than:

string.length – 1 – Math.abs(stop)

You may try this

alist[0] = 2014

but if you are not sure about the position of 123 then you may try like this:

for idx, item in enumerate(alist):
   if 123 in item:
       alist[idx] = 2014

If you have control over the input file, and it's an array of objects, you can solve this more easily. Arrange to output the file with each record on one line, like this:

[
   {"key": value},
   {"key": value},
   ...

This is still valid JSON.

Then, use the node.js readline module to process them one line at a time.

var fs = require("fs");

var lineReader = require('readline').createInterface({
    input: fs.createReadStream("input.txt")
});

lineReader.on('line', function (line) {
    line = line.trim();

    if (line.charAt(line.length-1) === ',') {
        line = line.substr(0, line.length-1);
    }

    if (line.charAt(0) === '{') {
        processRecord(JSON.parse(line));
    }
});

function processRecord(record) {
    // Process the records one at a time here! 
}

This is an informational message only. It means nothing if your test scripts and chromedriver are on the same machine then it is possible to add the "whitelisted-ips" option .your test will run fine.However if you use chromedriver in a grid setup, this message will not appear

None of the answers I read worked in PuTTY, so I found a comment on this article:

In the settings for your connection, under "Window->Behavior" you'll find a setting "System Menu Appears on ALT alone". Then CTRL + L, ALT, l (that's a lower case L) will scroll the screen and then clear the scrollback buffer.

(relevant to the OP because I am connecting to an Ubuntu server, but also apparently relevant no matter what your server is running.)

@Dhiraj's answer is correct, and for convenience you can use the autoFocus prop to have an input automatically focus when mounted:

<input autoFocus name=...

Note that in jsx it's autoFocus (capital F) unlike plain old html which is case-insensitive.

you can add values to specific columns as well, just specify the column names in which you like to add corresponding values:

Insert into Table (Col1, Col2, Col4,col5,Col7) Values ('Va11','Va2','Val4','Val5','Val7');

Make sure the columns you skip dont have not null value type.

It works fine for me...

This is default database :

$db['default'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'mydatabase',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => TRUE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

Add another database at the bottom of database.php file

$db['second'] = array(
    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'mysecond',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => TRUE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

In autoload.php config file

$autoload['libraries'] = array('database', 'email', 'session');

The default database is worked fine by autoload the database library but second database load and connect by using constructor in model and controller...

<?php
    class Seconddb_model extends CI_Model {
        function __construct(){
            parent::__construct();
            //load our second db and put in $db2
            $this->db2 = $this->load->database('second', TRUE);
        }

        public function getsecondUsers(){
            $query = $this->db2->get('members');
            return $query->result(); 
        }

    }
?>

As you mentioned, the simple way inside functions.php without using enqueue is this one:

add_action('wp_footer', 'customJsScript');
function customJsScript() {
  echo '
  <script>
  jQuery(function(){
    console.log("test");
  });
  </script>
  ';
}

As you see, you use the wp_footer action to inject the code.

But you may prefer to put directly the code inside header.php or footer.php if is a code that will be inserted all-over WordPress

VM Ubuntu on a Mac...fn + shift + up/down arrows

The folder is part of the URL you set when you create request: "ftp://www.contoso.com/test.htm". If you use "ftp://www.contoso.com/wibble/test.htm" then the file will be uploaded to a folder named wibble.

You may need to first use a request with Method = WebRequestMethods.Ftp.MakeDirectory to make the wibble folder if it doesn't already exist.

Try:

start  "" "C:\Program Files (x86)\Microsoft Office\Office12\WINWORD.EXE" --new-window/min

I had the same problem, but I was trying to open chrome.exe maximized. If I put the /min anywhere else in the command line, like before or after the empty title, it was ignored.

I don't know what the "preferred" method is (ask 100 people and get 100 different opinions) but do what's simplest and what works. GetName works but requires a lot more keystrokes. ToString() seems to do the job very well.

I was the same problem and as Pengyy suggest, that is the fix. Thanks a lot.

My problem on the Browser Console:

PortafolioComponent.html:3 ERROR Error: Error trying to diff '[object Object]'. Only arrays and iterables are allowed(…)

In my case my code fix was:

//productos.service.ts
import { Injectable } from '@angular/core';
import { Http } from '@angular/http';

@Injectable()
export class ProductosService {

  productos:any[] = [];
  cargando:boolean = true;

  constructor( private http:Http) {
    this.cargar_productos();
  }

  public cargar_productos(){

    this.cargando = true;

    this.http.get('https://webpage-88888a1.firebaseio.com/productos.json')
      .subscribe( res => {
        console.log(res.json());
        this.cargando = false;
        this.productos = res.json().productos; // Before this.productos = res.json(); 
      });
  }

}

I had docker up to date, docker said it was running, and the diagnosis was good. I needed to unset some legacy environment variable (thanks https://docs.docker.com/docker-for-mac/troubleshoot/#workarounds-for-common-problems )

unset DOCKER_HOST
unset DOCKER_CERT_PATH
unset DOCKER_TLS_VERIFY

$this->db->where_in('id', ['20','15','22','42','86']);

Reference: where_in

Swift 4 - 5.1 Protocol Extensions

public protocol NibInstantiatable {
    
    static func nibName() -> String
    
}

extension NibInstantiatable {
    
    static func nibName() -> String {
        return String(describing: self)
    }
    
}

extension NibInstantiatable where Self: UIView {
    
    static func fromNib() -> Self {
        
        let bundle = Bundle(for: self)
        let nib = bundle.loadNibNamed(nibName(), owner: self, options: nil)
        
        return nib!.first as! Self
        
    }
    
}

Adoption

class MyView: UIView, NibInstantiatable {

}

This implementation assumes that the Nib has the same name as the UIView class. Ex. MyView.xib. You can modify this behavior by implementing nibName() in MyView to return a different name than the default protocol extension implementation.

In the xib the files owner is MyView and the root view class is MyView.

Usage

let view = MyView.fromNib()

Not sure if this does all expected things, but you can do just like that:

>>> del mymodule
>>> import mymodule

just posting in case anyone else has the same error...

I was using 'await' outside of an 'async' function and for whatever reason that results in a 'missing ) after argument list' error.

The solution was to make the function asynchronous

function functionName(args) {}

becomes

async function functionName(args) {}

Try calling it like: obj.some_function( '1', 2, '3', g="foo", h="bar" ). After the required positional arguments, you can specify specific optional arguments by name.

You can try this lib, easy to change color for the switch button.
https://github.com/kyleduo/SwitchButton

based on this link , the correct answer (which i've tested myself) is:

put this code in the constructor or the onCreate() method of the dialog:

getWindow().setLayout(WindowManager.LayoutParams.MATCH_PARENT,
                WindowManager.LayoutParams.MATCH_PARENT);

in addition , set the style of the dialog to :

<style name="full_screen_dialog">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
    <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
</style>

this could be achieved via the constructor , for example :

public FullScreenDialog(Context context)
{
  super(context, R.style.full_screen_dialog);
  ...

EDIT: an alternative to all of the above would be to set the style to android.R.style.ThemeOverlay and that's it.

I've been trying to do something very similar but not using the nodes. However, my xml structure is a little different.

You have it like this:

<Metrics>
    <Metric id="TransactionCleanupThread.RefundOldTrans" type="timer" ...>

If it were like this instead:

<Metrics>
    <Metric>
        <id>TransactionCleanupThread.RefundOldTrans</id>
        <type>timer</type>
        .
        .
        .

Then you could simply use this SQL statement.

SELECT
    Sqm.SqmId,
    Data.value('(/Sqm/Metrics/Metric/id)[1]', 'varchar(max)') as id,
    Data.value('(/Sqm/Metrics/Metric/type)[1]', 'varchar(max)') AS type,
    Data.value('(/Sqm/Metrics/Metric/unit)[1]', 'varchar(max)') AS unit,
    Data.value('(/Sqm/Metrics/Metric/sum)[1]', 'varchar(max)') AS sum,
    Data.value('(/Sqm/Metrics/Metric/count)[1]', 'varchar(max)') AS count,
    Data.value('(/Sqm/Metrics/Metric/minValue)[1]', 'varchar(max)') AS minValue,
    Data.value('(/Sqm/Metrics/Metric/maxValue)[1]', 'varchar(max)') AS maxValue,
    Data.value('(/Sqm/Metrics/Metric/stdDeviation)[1]', 'varchar(max)') AS stdDeviation,
FROM Sqm

To me this is much less confusing than using the outer apply or cross apply.

I hope this helps someone else looking for a simpler solution!

You can take class made by Microsoft:

internal class Set<TElement>
{
    private int[] _buckets;
    private Slot[] _slots;
    private int _count;
    private int _freeList;
    private readonly IEqualityComparer<TElement> _comparer;

    public Set()
        : this(null)
    {
    }

    public Set(IEqualityComparer<TElement> comparer)
    {
        if (comparer == null)
            comparer = EqualityComparer<TElement>.Default;
        _comparer = comparer;
        _buckets = new int[7];
        _slots = new Slot[7];
        _freeList = -1;
    }

    public bool Add(TElement value)
    {
        return !Find(value, true);
    }

    public bool Contains(TElement value)
    {
        return Find(value, false);
    }

    public bool Remove(TElement value)
    {
        var hashCode = InternalGetHashCode(value);
        var index1 = hashCode % _buckets.Length;
        var index2 = -1;
        for (var index3 = _buckets[index1] - 1; index3 >= 0; index3 = _slots[index3].Next)
        {
            if (_slots[index3].HashCode == hashCode && _comparer.Equals(_slots[index3].Value, value))
            {
                if (index2 < 0)
                    _buckets[index1] = _slots[index3].Next + 1;
                else
                    _slots[index2].Next = _slots[index3].Next;
                _slots[index3].HashCode = -1;
                _slots[index3].Value = default(TElement);
                _slots[index3].Next = _freeList;
                _freeList = index3;
                return true;
            }
            index2 = index3;
        }
        return false;
    }

    private bool Find(TElement value, bool add)
    {
        var hashCode = InternalGetHashCode(value);
        for (var index = _buckets[hashCode % _buckets.Length] - 1; index >= 0; index = _slots[index].Next)
        {
            if (_slots[index].HashCode == hashCode && _comparer.Equals(_slots[index].Value, value))
                return true;
        }
        if (add)
        {
            int index1;
            if (_freeList >= 0)
            {
                index1 = _freeList;
                _freeList = _slots[index1].Next;
            }
            else
            {
                if (_count == _slots.Length)
                    Resize();
                index1 = _count;
                ++_count;
            }
            int index2 = hashCode % _buckets.Length;
            _slots[index1].HashCode = hashCode;
            _slots[index1].Value = value;
            _slots[index1].Next = _buckets[index2] - 1;
            _buckets[index2] = index1 + 1;
        }
        return false;
    }

    private void Resize()
    {
        var length = checked(_count * 2 + 1);
        var numArray = new int[length];
        var slotArray = new Slot[length];
        Array.Copy(_slots, 0, slotArray, 0, _count);
        for (var index1 = 0; index1 < _count; ++index1)
        {
            int index2 = slotArray[index1].HashCode % length;
            slotArray[index1].Next = numArray[index2] - 1;
            numArray[index2] = index1 + 1;
        }
        _buckets = numArray;
        _slots = slotArray;
    }

    internal int InternalGetHashCode(TElement value)
    {
        if (value != null)
            return _comparer.GetHashCode(value) & int.MaxValue;
        return 0;
    }

    internal struct Slot
    {
        internal int HashCode;
        internal TElement Value;
        internal int Next;
    }
}

and then

public static T[] GetSub<T>(this T[] first, T[] second)
    {
        var items = IntersectIteratorWithIndex(first, second);
        if (!items.Any()) return new T[] { };


        var index = items.First().Item2;
        var length = first.Count() - index;
        var subArray = new T[length];
        Array.Copy(first, index, subArray, 0, length);
        return subArray;
    }

    private static IEnumerable<Tuple<T, Int32>> IntersectIteratorWithIndex<T>(IEnumerable<T> first, IEnumerable<T> second)
    {
        var firstList = first.ToList();
        var set = new Set<T>();
        foreach (var i in second)
            set.Add(i);
        foreach (var i in firstList)
        {
            if (set.Remove(i))
                yield return new Tuple<T, Int32>(i, firstList.IndexOf(i));
        }
    }

I had a very difficult time getting this working one under VS2015 one day. After the initial install everything was working, but I come in this morning and my keyboard shortcuts don't work. Going through Resharper's Environment > Keyboard & Menus didn't work; reinstalling Resharper didn't work. Even deleting every configuration from Resharper's AppData folder didn't work.

So what did work? Going to Visual Studio's Tools > Options > Environment > Keyboard and clicking Reset. After I did that, then Resharper's schemes would take.

As JavaScript is a client-side language and PHP is a server-side language you would need to physically push the variable to the PHP script, by either including the variable on the page load of the PHP script (script.php?var=test), which really has nothing to do with JavaScript, or by passing the variable to the PHP via an AJAX/AHAH call each time the variable is changed.

If you did want to go down the second path, you'd be looking at XMLHttpRequest, or my preference, jQuerys Ajax calls: http://docs.jquery.com/Ajax

1) I'd add a /n after init. i.e. write( USB, "init\n", 5);

2) Double check the serial port configuration. Odds are something is incorrect in there. Just because you don't use ^Q/^S or hardware flow control doesn't mean the other side isn't expecting it.

3) Most likely: Add a "usleep(100000); after the write(). The file-descriptor is set not to block or wait, right? How long does it take to get a response back before you can call read? (It has to be received and buffered by the kernel, through system hardware interrupts, before you can read() it.) Have you considered using select() to wait for something to read()? Perhaps with a timeout?

Edited to Add:

Do you need the DTR/RTS lines? Hardware flow control that tells the other side to send the computer data? e.g.

int tmp, serialLines;

cout << "Dropping Reading DTR and RTS\n";
ioctl ( readFd, TIOCMGET, & serialLines );
serialLines &= ~TIOCM_DTR;
serialLines &= ~TIOCM_RTS;
ioctl ( readFd, TIOCMSET, & serialLines );
usleep(100000);
ioctl ( readFd, TIOCMGET, & tmp );
cout << "Reading DTR status: " << (tmp & TIOCM_DTR) << endl;
sleep (2);

cout << "Setting Reading DTR and RTS\n";
serialLines |= TIOCM_DTR;
serialLines |= TIOCM_RTS;
ioctl ( readFd, TIOCMSET, & serialLines );
ioctl ( readFd, TIOCMGET, & tmp );
cout << "Reading DTR status: " << (tmp & TIOCM_DTR) << endl;

You want this - enter N and then take N number of elements.I am considering your input case is just like this

5
2 3 6 6 5

have this in this way in python 3.x (for python 2.x use raw_input() instead if input())

Python 3

n = int(input())
arr = input()   # takes the whole line of n numbers
l = list(map(int,arr.split(' '))) # split those numbers with space( becomes ['2','3','6','6','5']) and then map every element into int (becomes [2,3,6,6,5])

Python 2

n = int(raw_input())
arr = raw_input()   # takes the whole line of n numbers
l = list(map(int,arr.split(' '))) # split those numbers with space( becomes ['2','3','6','6','5']) and then map every element into int (becomes [2,3,6,6,5])

You may want to use time proved xPDF and derived tools to extract text instead as pyPDF2 seems to have various issues with the text extraction still.

The long answer is that there are lot of variations how a text is encoded inside PDF and that it may require to decoded PDF string itself, then may need to map with CMAP, then may need to analyze distance between words and letters etc.

In case the PDF is damaged (i.e. displaying the correct text but when copying it gives garbage) and you really need to extract text, then you may want to consider converting PDF into image (using ImageMagik) and then use Tesseract to get text from image using OCR.

Here is what i have done to find the version: just write SELECT @@version and it will give you the version.

This is the documentation that you want: http://msdn.microsoft.com/en-us/library/aa292114(VS.71).aspx

I guess the answer is, yes, there is an equivalent that will accomplish the same thing, integrated with Windows security.

Invoking of validation on form element could be handled by triggering change event on this element:

a) exemple: trigger change on separated element in form

$scope.formName.elementName.$$element.change();

b) exemple: trigger change event for each of form elements for example on ng-submit, ng-click, ng-blur ...

vm.triggerChangeForFormElements = function() {
    // trigger change event for each of form elements
    angular.forEach($scope.formName, function (element, name) {
        if (!name.startsWith('$')) {
            element.$$element.change();
        }
    });
};

c) and one more way for that

    var handdleChange = function(form){
        var formFields = angular.element(form)[0].$$controls;
        angular.forEach(formFields, function(field){
            field.$$element.change();
        });
    };

A common misunderstanding among starters is that they think that the call of a forward(), sendRedirect(), or sendError() would magically exit and "jump" out of the method block, hereby ignoring the remnant of the code. For example:

protected void doXxx() {
    if (someCondition) {
        sendRedirect();
    }
    forward(); // This is STILL invoked when someCondition is true!
}

This is thus actually not true. They do certainly not behave differently than any other Java methods (expect of System#exit() of course). When the someCondition in above example is true and you're thus calling forward() after sendRedirect() or sendError() on the same request/response, then the chance is big that you will get the exception:

java.lang.IllegalStateException: Cannot forward after response has been committed

If the if statement calls a forward() and you're afterwards calling sendRedirect() or sendError(), then below exception will be thrown:

java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed

To fix this, you need either to add a return; statement afterwards

protected void doXxx() {
    if (someCondition) {
        sendRedirect();
        return;
    }
    forward();
}

... or to introduce an else block.

protected void doXxx() {
    if (someCondition) {
        sendRedirect();
    } else {
        forward();
    }
}

To naildown the root cause in your code, just search for any line which calls a forward(), sendRedirect() or sendError() without exiting the method block or skipping the remnant of the code. This can be inside the same servlet before the particular code line, but also in any servlet or filter which was been called before the particular servlet.

In case of sendError(), if your sole purpose is to set the response status, use setStatus() instead.

Another probable cause is that the servlet writes to the response while a forward() will be called, or has been called in the very same method.

protected void doXxx() {
    out.write("some string");
    // ... 
    forward(); // Fail!
}

The response buffer size defaults in most server to 2KB, so if you write more than 2KB to it, then it will be committed and forward() will fail the same way:

java.lang.IllegalStateException: Cannot forward after response has been committed

Solution is obvious, just don't write to the response in the servlet. That's the responsibility of the JSP. You just set a request attribute like so request.setAttribute("data", "some string") and then print it in JSP like so ${data}. See also our Servlets wiki page to learn how to use Servlets the right way.

Another probable cause is that the servlet writes a file download to the response after which e.g. a forward() is called.

protected void doXxx() {
    out.write(bytes);
    // ... 
    forward(); // Fail!
}

This is technically not possible. You need to remove the forward() call. The enduser will stay on the currently opened page. If you actually intend to change the page after a file download, then you need to move the file download logic to page load of the target page.

Yet another probable cause is that the forward(), sendRedirect() or sendError() methods are invoked via Java code embedded in a JSP file in form of old fashioned way <% scriptlets %>, a practice which was officially discouraged since 2001. For example:

<!DOCTYPE html>
<html lang="en">
    <head>
        ... 
    </head>
    <body>
        ...

        <% sendRedirect(); %>
        
        ...
    </body>
</html>

The problem here is that JSP internally immediately writes template text (i.e. HTML code) via out.write("<!DOCTYPE html> ... etc ...") as soon as it's encountered. This is thus essentially the same problem as explained in previous section.

Solution is obvious, just don't write Java code in a JSP file. That's the responsibility of a normal Java class such as a Servlet or a Filter. See also our Servlets wiki page to learn how to use Servlets the right way.

See also:

• What exactly does "Response already committed" mean? How to handle exceptions then?

Unrelated to your concrete problem, your JDBC code is leaking resources. Fix that as well. For hints, see also How often should Connection, Statement and ResultSet be closed in JDBC?

Use the TimeSpan object to capture your initial time element and use the methods such as AddHours or AddMinutes. To substract 3 hours, you will do AddHours(-3). To substract 45 mins, you will do AddMinutes(-45)

method = POST will work if you 'post' a form to the url /test.

if you type a url in address bar of a browser and hit enter, it's always a GET request, so you had to specify POST request.

Google for HTTP GET and HTTP POST (there are several others like PUT DELETE). They all have their own meaning.

df=pd.read_csv("filename.csv" , parse_dates=["<column name>"])

type(df.<column name>)

example: if you want to convert day which is initially a string to a Timestamp in Pandas

df=pd.read_csv("weather_data2.csv" , parse_dates=["day"])

type(df.day)

The output will be pandas.tslib.Timestamp

What about cases where you want to reuse the name of a property, for example when throwing exception based on a property name, or handling a PropertyChanged event. There are numerous cases where you would want to have the name of the property.

Take this example:

switch (e.PropertyName)
{
    case nameof(SomeProperty):
    { break; }

    // opposed to
    case "SomeOtherProperty":
    { break; }
}

In the first case, renaming SomeProperty will change the name of the property too, or it will break compilation. The last case doesn't.

This is a very useful way to keep your code compiling and bug free (sort-of).

(A very nice article from Eric Lippert why infoof didn't make it, while nameof did)

In Swift 2 you can do it in this way:

var dictionary: NSDictionary = ...

/* NSDictionary to NSData */
let data = NSKeyedArchiver.archivedDataWithRootObject(dictionary)

/* NSData to NSDictionary */
let unarchivedDictionary = NSKeyedUnarchiver.unarchiveObjectWithData(data!) as! NSDictionary

In Swift 3:

/* NSDictionary to NSData */
let data = NSKeyedArchiver.archivedData(withRootObject: dictionary)

/* NSData to NSDictionary */
let unarchivedDictionary = NSKeyedUnarchiver.unarchiveObject(with: data)

To select the right location provider for your app, you can use Criteria objects:

Criteria myCriteria = new Criteria();
myCriteria.setAccuracy(Criteria.ACCURACY_HIGH);
myCriteria.setPowerRequirement(Criteria.POWER_LOW);
// let Android select the right location provider for you
String myProvider = locationManager.getBestProvider(myCriteria, true); 

// finally require updates at -at least- the desired rate
long minTimeMillis = 600000; // 600,000 milliseconds make 10 minutes
locationManager.requestLocationUpdates(myProvider,minTimeMillis,0,locationListener); 

Read the documentation for requestLocationUpdates for more details on how the arguments are taken into account:

The frequency of notification may be controlled using the minTime and minDistance parameters. If minTime is greater than 0, the LocationManager could potentially rest for minTime milliseconds between location updates to conserve power. If minDistance is greater than 0, a location will only be broadcasted if the device moves by minDistance meters. To obtain notifications as frequently as possible, set both parameters to 0.

More thoughts

• You can monitor the accuracy of the Location objects with Location.getAccuracy(), which returns the estimated accuracy of the position in meters.
• the Criteria.ACCURACY_HIGH criterion should give you errors below 100m, which is not as good as GPS can be, but matches your needs.
• You also need to monitor the status of your location provider, and switch to another provider if it gets unavailable or disabled by the user.
• The passive provider may also be a good match for this kind of application: the idea is to use location updates whenever they are requested by another app and broadcast systemwide.

Look at the r.status_code attribute:

if r.status_code == 404:
    # A 404 was issued.

Demo:

>>> import requests
>>> r = requests.get('http://httpbin.org/status/404')
>>> r.status_code
404

If you want requests to raise an exception for error codes (4xx or 5xx), call r.raise_for_status():

>>> r = requests.get('http://httpbin.org/status/404')
>>> r.raise_for_status()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "requests/models.py", line 664, in raise_for_status
    raise http_error
requests.exceptions.HTTPError: 404 Client Error: NOT FOUND
>>> r = requests.get('http://httpbin.org/status/200')
>>> r.raise_for_status()
>>> # no exception raised.

You can also test the response object in a boolean context; if the status code is not an error code (4xx or 5xx), it is considered ‘true’:

if r:
    # successful response

If you want to be more explicit, use if r.ok:.

You can't. CSS does not support "events". Dare I ask what you need it for? Check out this post here on SO. I can't think of a reason why you would want to hook up an event to a style change. I'm assuming here that the style change is triggered somwhere else by a piece of javascript. Why not add extra logic there?

Unfortunately, most of these tools only return the NS record as provided by the actual name server itself. To be more accurate in determining which name servers are actually responsible for a domain, you'd have to either use "whois" and check the domains listed there OR use "dig [domain] NS @[root name server]" and run that recursively until you get the name server listings...

I wish there were a simple command line that you could run to get THAT result dependably and in a consistent format, not just the result that is given from the name server itself. The purpose of this for me is to be able to query about 330 domain names that I manage so I can determine exactly which name server each domain is pointing to (as per their registrar settings).

Anyone know of a command using "dig" or "host" or something else on *nix?

Have a look at insertAdjacentHTML

var element = document.getElementById("one");
var newElement = '<div id="two">two</div>'
element.insertAdjacentHTML( 'afterend', newElement )
// new DOM structure: <div id="one">one</div><div id="two">two</div>

position is the position relative to the element you are inserting adjacent to:

'beforebegin' Before the element itself

'afterbegin' Just inside the element, before its first child

'beforeend' Just inside the element, after its last child

'afterend' After the element itself

For PHP >= 5.4 you can use a simpler function like this : http_response_code(404);
PHP Documentation

you could build a function that takes a list as a parameter and returns a shuffled version of the list:

from random import *

def listshuffler(inputlist):
    for i in range(len(inputlist)):
        swap = randint(0,len(inputlist)-1)
        temp = inputlist[swap]
        inputlist[swap] = inputlist[i]
        inputlist[i] = temp
    return inputlist

You can also use hash-based navigation by including the following in app.module.ts

import { LocationStrategy, HashLocationStrategy } from '@angular/common';

and by adding the following to the @NgModule({ ... })

@NgModule({
  ...
  providers:    [
      ProductService, {
          provide: LocationStrategy, useClass: HashLocationStrategy
      }
  ],
  ...
})

“HashLocationStrategy—A hash sign (#) is added to the URL, and the URL segment after the hash uniquely identifies the route to be used as a web page fragment. This strategy works with all browsers, including the old ones.”

Excerpt From: Yakov Fain Anton Moiseev. “Angular 2 Development with TypeScript.”

Try this, I have got success response ..it's working

$("#divId").css("background-image", "url('data:image/png;base64," + base64String + "')");

Using dplyr (a bit like sapply..)

df2 <- mutate_all(df1, function(x) as.numeric(as.character(x)))

which gives:

glimpse(df2)
Observations: 4
Variables: 2
$ a <dbl> 0.01, 0.02, 0.03, 0.04
$ b <dbl> 2, 4, 5, 7

from your df1 which was:

glimpse(df1)
Observations: 4
Variables: 2
$ a <fctr> 0.01, 0.02, 0.03, 0.04
$ b <dbl> 2, 4, 5, 7

If you use Dreamweaver you could easily note to unclosed div. In the left pane of the code view you can see there <> highlight invalid code button, click this button and you will notice the unclosed div highlighted and then close your unclosed div. Press F5 to refresh the page to see that any other unclosed div are there.

You can also validate your page in Dreamweaver too. File>Check Page>Browser Compatibility, then task-pane will appear Click on Validation, on the left side there you'll see ? button click this to validate.

Enjoy!

It's probably best to use the Python Image Library to do this which I'm afraid is a separate download.

The easiest way to do what you want is via the load() method on the Image object which returns a pixel access object which you can manipulate like an array:

from PIL import Image

im = Image.open('dead_parrot.jpg') # Can be many different formats.
pix = im.load()
print im.size  # Get the width and hight of the image for iterating over
print pix[x,y]  # Get the RGBA Value of the a pixel of an image
pix[x,y] = value  # Set the RGBA Value of the image (tuple)
im.save('alive_parrot.png')  # Save the modified pixels as .png

Alternatively, look at ImageDraw which gives a much richer API for creating images.

This is an example for a RelativeLayout:

RelativeLayout relativeLayout=(RelativeLayout)vi.findViewById(R.id.RelativeLayoutLeft);
                RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayout.getLayoutParams();
                params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                relativeLayout.setLayoutParams(params);

With another kind of layout (example LinearLayout) you just simply has to change RelativeLayout for LinearLayout.

Boost Informational Macros. You need: BOOST_VERSION

I am using Flask Bootstrap. My solution is a little bit simpler because my template already receives the option or choice as a parameter from Flask.

var choice = document.getElementById("{{ item_kind }}");_x000D_
choice.className += "active";

First line, js code gets the element. So, you should identify each of the elements with a id. I'll show an example below. Second line, you add the class active. You can see html ids below.

<div class="navbar-collapse collapse">_x000D_
    <ul class="nav navbar-nav"> _x000D_
        <li>_x000D_
            <a id="speed" href="{{ url_for('list_gold_per_item',item_kind='speed',level='2') }}">_x000D_
                <h2>Speed</h2>_x000D_
            </a>_x000D_
        </li>_x000D_
        <li>_x000D_
            <a id="life" href="{{ url_for('list_gold_per_item',item_kind='life',level='3') }}">_x000D_
                <h2>Life</h2>_x000D_
            </a>_x000D_
        </li>_x000D_
    </ul>_x000D_
</div>

I had the exact same problem. Running mvn clean install instead of mvn clean compile resolved it. The difference only occurs when using multi-maven-project since the project dependencies are uploaded to the local repository by using install.

You can do this with the following:

int counter = 0;
String sql = "SELECT projectName,Owner " + "FROM Project WHERE Owner= ?";
PreparedStatement prep = conn.prepareStatement(sql);
prep.setString(1, "");
ResultSet rs = prep.executeQuery();
while (rs.next()) {
    counter++;
}
System.out.println(counter);

This will give you the no of rows where the column value is null or blank.

Hopefully it will be still helpful, the application.properties (or application.yml) file must be in both the paths:

• src/main/resource/config
• src/test/resource/config

containing the same property you are referring

Below is the example of searching for a keyword in the whole list and remove that item:

public class Book
{
  public int BookId { get; set; }
  public DateTime CreatedDate { get; set; }
  public string Text { get; set; }
  public string Autor { get; set; }
  public string Source { get; set; }
}

If you want to remove a book that contains some keyword in the Text property, you can create a list of keywords and remove it from list of books:

List<Book> listToSearch = new List<Book>()
   {
        new Book(){
            BookId = 1,
            CreatedDate = new DateTime(2014, 5, 27),
            Text = " test voprivreda...",
            Autor = "abc",
            Source = "SSSS"

        },
        new Book(){
            BookId = 2,
            CreatedDate = new DateTime(2014, 5, 27),
            Text = "here you go...",
            Autor = "bcd",
            Source = "SSSS"


        }
    };

var blackList = new List<string>()
            {
                "test", "b"
            }; 

foreach (var itemtoremove in blackList)
    {
        listToSearch.RemoveAll(p => p.Source.ToLower().Contains(itemtoremove.ToLower()) || p.Source.ToLower().Contains(itemtoremove.ToLower()));
    }


return listToSearch.ToList();

You can use references in a change migration. This is valid Rails 3.2.13 code:

class AddUserToTester < ActiveRecord::Migration
  def change
    change_table :testers do |t|
      t.references :user, index: true 
    end
  end
  def down
    change_table :testers do |t|
      t.remove :user_id
    end
  end
end

c.f.: http://apidock.com/rails/ActiveRecord/ConnectionAdapters/SchemaStatements/change_table

I was getting the same error. I was using Intellij IDEA and I wanted to run Spring boot application. So, solution from my side is as follow.

Go to Run menu -> Run configuration -> Click on Add button from the left panel and select maven -> In parameters add this text -> spring-boot:run

Now press Ok and Run.

Explanation of Serialize and Deserialize using Python

In python, pickle module is used for serialization. So, the serialization process is called pickling in Python. This module is available in Python standard library.

Serialization using pickle

import pickle

#the object to serialize
example_dic={1:"6",2:"2",3:"f"}

#where the bytes after serializing end up at, wb stands for write byte
pickle_out=open("dict.pickle","wb")
#Time to dump
pickle.dump(example_dic,pickle_out)
#whatever you open, you must close
pickle_out.close()

The PICKLE file (can be opened by a text editor like notepad) contains this (serialized data):

€}q (KX 6qKX 2qKX fqu.

Deserialization using pickle

import pickle

pickle_in=open("dict.pickle","rb")
get_deserialized_data_back=pickle.load(pickle_in)

print(get_deserialized_data_back)

Output:

{1: '6', 2: '2', 3: 'f'}

2018 now. You don't need any extensions for auto-imports in Javascript (as long as you have checkjs: true in your jsconfig.json file) and TypeScript.

There are two types of auto imports: the add missing import quick fix which shows up as a lightbulb on errors:

And the auto import suggestions. These show up a suggestion items as you type. Accepting an auto import suggestion automatically adds the import at the top of the file

Both should work out of the box with JavaScript and TypeScript. If auto imports still do not work for you, please open an issue

You're very close:

while IFS=$'\t' read -r -a myArray
do
 echo "${myArray[0]}"
 echo "${myArray[1]}"
 echo "${myArray[2]}"
done < myfile

(The -r tells read that \ isn't special in the input data; the -a myArray tells it to split the input-line into words and store the results in myArray; and the IFS=$'\t' tells it to use only tabs to split words, instead of the regular Bash default of also allowing spaces to split words as well. Note that this approach will treat one or more tabs as the delimiter, so if any field is blank, later fields will be "shifted" into earlier positions in the array. Is that O.K.?)

Balance is a truly subtle property; you think you know what it is, but it's so easy to get wrong. In particular, even Eric Lippert's (good) answer is off. That's because the notion of height is not enough. You need to have the concept of minimum and maximum heights of a tree (where the minimum height is the least number of steps from the root to a leaf, and the maximum is... well, you get the picture). Given that, we can define balance to be:

A tree where the maximum height of any branch is no more than one more than the minimum height of any branch.

(This actually implies that the branches are themselves balanced; you can pick the same branch for both maximum and minimum.)

All you need to do to verify this property is a simple tree traversal keeping track of the current depth. The first time you backtrack, that gives you a baseline depth. Each time after that when you backtrack, you compare the new depth against the baseline

• if it's equal to the baseline, then you just continue
• if it is more than one different, the tree isn't balanced
• if it is one off, then you now know the range for balance, and all subsequent depths (when you're about to backtrack) must be either the first or the second value.

In code:

class Tree {
    Tree left, right;
    static interface Observer {
        public void before();
        public void after();
        public boolean end();
    }
    static boolean traverse(Tree t, Observer o) {
        if (t == null) {
            return o.end();
        } else {
            o.before();
            try {
                if (traverse(left, o))
                    return traverse(right, o);
                return false;
            } finally {
                o.after();
            }
        }
    }
    boolean balanced() {
        final Integer[] heights = new Integer[2];
        return traverse(this, new Observer() {
            int h;
            public void before() { h++; }
            public void after() { h--; }
            public boolean end() {
                if (heights[0] == null) {
                    heights[0] = h;
                } else if (Math.abs(heights[0] - h) > 1) {
                    return false;
                } else if (heights[0] != h) {
                    if (heights[1] == null) {
                        heights[1] = h;
                    } else if (heights[1] != h) {
                        return false;
                    }
                }
                return true;
            }
        });
    }
}

I suppose you could do this without using the Observer pattern, but I find it easier to reason this way.

[EDIT]: Why you can't just take the height of each side. Consider this tree:

        /\
       /  \
      /    \
     /      \_____
    /\      /     \_
   /  \    /      / \
  /\   C  /\     /   \
 /  \    /  \   /\   /\
A    B  D    E F  G H  J

OK, a bit messy, but each side of the root is balanced: C is depth 2, A, B, D, E are depth 3, and F, G, H, J are depth 4. The height of the left branch is 2 (remember the height decreases as you traverse the branch), the height of the right branch is 3. Yet the overall tree is not balanced as there is a difference in height of 2 between C and F. You need a minimax specification (though the actual algorithm can be less complex as there should be only two permitted heights).

I followed the answers here but when I tried to connect with my new user, I got an error message stating "The server principal 'newuser' is not able to access the database 'master' under the current security context".

I had to also create a new user in the master table to successfully log in with SSMS.

USE [master]
GO
CREATE LOGIN [newuser] WITH PASSWORD=N'blahpw'
GO
CREATE USER [newuser] FOR LOGIN [newuser] WITH DEFAULT_SCHEMA=[dbo]
GO

USE [MyDatabase]
CREATE USER newuser FOR LOGIN newuser WITH DEFAULT_SCHEMA = dbo
GO
EXEC sp_addrolemember N'db_owner', N'newuser'
GO

You can do it without setlocal, because of the setlocal command the variable won't survive an endlocal because it was created in setlocal. In this way the variable will be defined the right way.

To do that use this code:

set var1=A

set var2=B

set AB=hi

call set newvar=%%%var1%%var2%%%

echo %newvar% 

Note: You MUST use call before you set the variable or it won't work.

I did this by installing Cygwin64 from this link https://www.cygwin.com/ Then - View Full, Search gcc and scroll down to find pkg-config. Click on icon to select latest version. This worked for me well.

My solutions in one of my own sites, with a table:

$.getJSON("sections/view_numbers_update.php", function(data) {
 $.each(data, function(index, objNumber) {
  $('#tr_' + objNumber.intID).find("td").eq(3).html(objNumber.datLastCalled);
  $('#tr_' + objNumber.intID).find("td").eq(4).html(objNumber.strStatus);
  $('#tr_' + objNumber.intID).find("td").eq(5).html(objNumber.intDuration);
  $('#tr_' + objNumber.intID).find("td").eq(6).html(objNumber.blnWasHuman);
 });
});

sections/view_numbers_update.php Returns something like:

[{"intID":"19","datLastCalled":"Thu, 10 Jan 13 08:52:20 +0000","strStatus":"Completed","intDuration":"0:04 secs","blnWasHuman":"Yes","datModified":1357807940},
{"intID":"22","datLastCalled":"Thu, 10 Jan 13 08:54:43 +0000","strStatus":"Completed","intDuration":"0:00 secs","blnWasHuman":"Yes","datModified":1357808079}]

HTML table:

<table id="table_numbers">
 <tr>
  <th>[...]</th>
  <th>[...]</th>
  <th>[...]</th>
  <th>Last Call</th>
  <th>Status</th>
  <th>Duration</th>
  <th>Human?</th>
  <th>[...]</th>
 </tr>
 <tr id="tr_123456">
  [...]
 </tr>
</table>

This essentially gives every row a unique id preceding with 'tr_' to allow for other numbered element ids, at server script time. The jQuery script then just gets this TR_[id] element, and fills the correct indexed cell with the json return.

The advantage is you could get the complete array from the DB, and either foreach($array as $record) to create the table html, OR (if there is an update request) you can die(json_encode($array)) before displaying the table, all in the same page, but same display code.

According to 3.9 version of Docker compose, you can use image: myapp:tag to specify name and tag.

version: "3.9"
services:
  webapp:
    build:
      context: .
      dockerfile: Dockerfile
    image: webapp:tag

Reference: https://docs.docker.com/compose/compose-file/compose-file-v3/

This error occurred when you are putting JPA dependencies in your spring-boot configuration file like in maven or gradle. The solution is: Spring-Boot Documentation

You have to specify the DB connection string and driver details in application.properties file. This will solve the issue. This might help to someone.

function limit_range($num, $min, $max)
{
  // Now limit it
  return $num>$max?$max:$num<$min?$min:$num;
}

$min = 0;  // Minimum number can be
$max = 4;  // Maximum number can be
$num = 10;  // Your number
// Number returned is limited to be minimum 0 and maximum 4
echo limit_range($num, $min, $max); // return 4
$num = 2;
echo limit_range($num, $min, $max); // return 2
$num = -1;
echo limit_range($num, $min, $max); // return 0

Yes, it's built in to jQuery. See the docs at jquery documentation.

ajaxError may be what you want.

FYI Dark theme is now in the Dev Version of MySQL Workbench

Update: From what I can tell it is Natively built into MySQL Workbench 8.0.15 for MAC OS X

The package I downloaded was mysql-workbench-community-8.0.15-macos-x86_64.dmg

https://dev.mysql.com/downloads/workbench/

You could try the Mersenne Twister algorithm.

http://en.wikipedia.org/wiki/Mersenne_twister

It has a good blend of speed and randomness, and a GPL implementation.

Without plugin cross browser with setInterval:

                        function rotatePic() {
                            jQuery({deg: 0}).animate(
                               {deg: 360},  
                               {duration: 3000, easing : 'linear', 
                                 step: function(now, fx){
                                   jQuery("#id").css({
                                      '-moz-transform':'rotate('+now+'deg)',
                                      '-webkit-transform':'rotate('+now+'deg)',
                                      '-o-transform':'rotate('+now+'deg)',
                                      '-ms-transform':'rotate('+now+'deg)',
                                      'transform':'rotate('+now+'deg)'
                                  });
                              }
                            });
                        }

                        var sec = 3;
                        rotatePic();
                        var timerInterval = setInterval(function() {
                            rotatePic();
                            sec+=3;
                            if (sec > 30) {
                                clearInterval(timerInterval);
                            }
                        }, 3000);

Warning: this can introduce security issues that SSL is designed to protect against, rendering your entire codebase insecure. It goes against every recommended practice.

But a really simple fix that worked for me was to call:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

before calling:

curl_exec():

in the php file.

I believe that this disables all verification of SSL certificates.

We don't need any server side changes. you can fix this only modify by web.config file This helped for me. try this out

<appSettings>
 <add key="aspnet:MaxJsonDeserializerMembers" value="2147483647" />
<add key="aspnet:UpdatePanelMaxScriptLength" value="2147483647" />
</appSettings>  

and   

<system.web.extensions>
<scripting>
  <webServices>
    <jsonSerialization maxJsonLength="2147483647"/>
  </webServices>
</scripting>

An enum is only guaranteed to be large enough to hold int values. The compiler is free to choose the actual type used based on the enumeration constants defined so it can choose a smaller type if it can represent the values you define. If you need enumeration constants that don't fit into an int you will need to use compiler-specific extensions to do so.

You can use "

You are missing, that \ is the escape character.

Look here: http://docs.python.org/reference/lexical_analysis.html at 2.4.1 "Escape Sequence"

Most importantly \n is a newline character. And \\ is an escaped escape character :D

>>> a = 'a\\\\nb'
>>> a
'a\\\\nb'
>>> print a
a\\nb
>>> a.replace('\\\\', '\\')
'a\\nb'
>>> print a.replace('\\\\', '\\')
a\nb

In PHPMyAdmin you can:

1. click copy on the row you want to know its insert statements SQL:

2. click Preview SQL:

3. you will get the created insert statement that generates it

You can apply that on many rows at once if you select them and click copy from the bottom of the table and then Preview SQl

There are two methods in jQuery to check for visibility:

$("#selector").is(":visible")

and

$("#selector").is(":hidden")

You can also execute commands based on visibility in the selector;

$("#selector:visible").hide()

or

$("#selector:hidden").show()

no need to delete the entire metadata. just try deleting the .snap file under org.eclipse.core.resources in your workspace folder ex.

workspaceFolder.metadata.plugins\org.eclipse.core.resources

This function creates a temporary form, then send data using jQuery :

function postToIframe(data,url,target){
    $('body').append('<form action="'+url+'" method="post" target="'+target+'" id="postToIframe"></form>');
    $.each(data,function(n,v){
        $('#postToIframe').append('<input type="hidden" name="'+n+'" value="'+v+'" />');
    });
    $('#postToIframe').submit().remove();
}

target is the 'name' attr of the target iFrame, and data is a JS object :

data={last_name:'Smith',first_name:'John'}

Change your FirstyActivity to:

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn_go=(Button)findViewById(R.id.YOUR_BUTTON_ID);
            btn_go.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                  Log.i("clicks","You Clicked B1");
              Intent i=new Intent(
                     MainActivity.this,
                     MainActivity2.class);
              startActivity(i);
            }
        }
    });

}

Hope it will help you.

Once I'd discovered all the information of how my client was handling the encryption/decryption at their end it was straight forward using the AesManaged example suggested by dtb.

The finally implemented code started like this:

    try
    {
        // Create a new instance of the AesManaged class.  This generates a new key and initialization vector (IV).
        AesManaged myAes = new AesManaged();

        // Override the cipher mode, key and IV
        myAes.Mode = CipherMode.ECB;
        myAes.IV = new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; // CRB mode uses an empty IV
        myAes.Key = CipherKey;  // Byte array representing the key
        myAes.Padding = PaddingMode.None;

        // Create a encryption object to perform the stream transform.
        ICryptoTransform encryptor = myAes.CreateEncryptor();

        // TODO: perform the encryption / decryption as required...

    }
    catch (Exception ex)
    {
        // TODO: Log the error 
        throw ex;
    }

Easiest: http://www.addthis.com/

Best? Well. probably not, But If you don't want to design something bespoke this is the best there is...

That seems to be an extra image being shown there.

You can try using this

<img src="/images/image_of_video.png" alt="image" />
/* write your code for the video here */

Now using jQuery play the video and hide the image as

$('img').click(function () {
  $(this).hide();
  // use the parameters to play the video now..
})

1 use eclipse bar to install a Mat plug-in to analyze, is a good choice. Studio Memory provides the Monitor 2.Android studio to display the memory occupancy of the application in real time.

To keep the button in the page flow:

<input type="button" value="Click Me" style="margin-left: auto; display: block;" />

(put that style in a .css file, do not use this html inline, for better maintenance)

The easiest way to do this is to let bash do it:

set -x

Or run it explicitly as bash -x myscript.

If you are trying to locate this file in Cloud 9, you can do

sudo vim /var/lib/pgsql9/data/pg_hba.conf

Press I to edit/insert, press ESC 3 times and type :wq will save the file and quit

Native ES2019 one-liner

const data = {
  aaa: 111,
  abb: 222,
  bbb: 333
};

const filteredByKey = Object.fromEntries(Object.entries(data).filter(([key, value]) => key.startsWith("a")))

console.log(filteredByKey);

I have also used following link as others have suggested you for bluetooth communication.

http://developer.android.com/guide/topics/connectivity/bluetooth.html

The thing is all you need is a class BluetoothChatService.java

this class has following threads:

1. Accept
2. Connecting
3. Connected

Now when you call start function of the BluetoothChatService like:

mChatService.start();

It starts accept thread which means it will start looking for connection.

Now when you call

mChatService.connect(<deviceObject>,false/true);

Here first argument is device object that you can get from paired devices list or when you scan for devices you will get all the devices in range you can pass that object to this function and 2nd argument is a boolean to make secure or insecure connection.

connect function will start connecting thread which will look for any device which is running accept thread.

When such a device is found both accept thread and connecting thread will call connected function in BluetoothChatService:

connected(mmSocket, mmDevice, mSocketType);

this method starts connected thread in both the devices: Using this socket object connected thread obtains the input and output stream to the other device. And calls read function on inputstream in a while loop so that it's always trying read from other device so that whenever other device send a message this read function returns that message.

BluetoothChatService also has a write method which takes byte[] as input and calls write method on connected thread.

mChatService.write("your message".getByte());

write method in connected thread just write this byte data to outputsream of the other device.

public void write(byte[] buffer) {
   try {
       mmOutStream.write(buffer);
    // Share the sent message back to the UI Activity
    // mHandler.obtainMessage(
    // BluetoothGameSetupActivity.MESSAGE_WRITE, -1, -1,
    // buffer).sendToTarget();
    } catch (IOException e) {
    Log.e(TAG, "Exception during write", e);
     }
}

Now to communicate between two devices just call write function on mChatService and handle the message that you will receive on the other device.

Wikipedia, of all places, actually discusses this.

The idea is to make sure all package names are unique world-wide, by having authors use a variant of a DNS name they own to name the package. For example, the owners of the domain name joda.org created a number of packages whose names begin with org.joda, for example:

• org.joda.time
• org.joda.time.base
• org.joda.time.chrono
• org.joda.time.convert
• org.joda.time.field
• org.joda.time.format

This question is especially actual because yesterday Microsoft officially announced .NET Core 1.0 release. Assuming that Mono implements most of the standard .NET libraries, the difference between Mono and .NET core can be seen through the difference between .NET Framework and .NET Core:

• APIs — .NET Core contains many of the same, but fewer, APIs as the .NET Framework, and with a different factoring (assembly names are
  different; type shape differs in key cases). These differences
  currently typically require changes to port source to .NET Core. .NET Core implements the .NET Standard Library API, which will grow to
  include more of the .NET Framework BCL APIs over time.
• Subsystems — .NET Core implements a subset of the subsystems in the .NET Framework, with the goal of a simpler implementation and
  programming model. For example, Code Access Security (CAS) is not
  supported, while reflection is supported.

If you need to launch something quickly, go with Mono because it is currently (June 2016) more mature product, but if you are building a long-term website, I would suggest .NET Core. It is officially supported by Microsoft and the difference in supported APIs will probably disappear soon, taking into account the effort that Microsoft puts in the development of .NET Core.

My goal is to use C#, LINQ, EF7, visual studio to create a website that can be ran/hosted in linux.

Linq and Entity framework are included in .NET Core, so you are safe to take a shot.

Have a look at the documentation. Use the intValue method:

NSNumber *number = [dict objectForKey:@"integer"];
int intValue = [number intValue];

In Windows we have multiple options :

1. clrscr() (Header File : conio.h)

2. system("cls") (Header File : stdlib.h)

In Linux, use system("clear") (Header File : stdlib.h)

You can create a pre-filled form URL from within the Form Editor, as described in the documentation for Drive Forms. You'll end up with a URL like this, for example:

https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=Mike+Jones&entry.787184751=1975-05-09&entry.1381372492&entry.960923899

buildUrls()

In this example, question 1, "Name", has an ID of 726721210, while question 2, "Birthday" is 787184751. Questions 3 and 4 are blank.

You could generate the pre-filled URL by adapting the one provided through the UI to be a template, like this:

function buildUrls() {
  var template = "https://docs.google.com/forms/d/--form-id--/viewform?entry.726721210=##Name##&entry.787184751=##Birthday##&entry.1381372492&entry.960923899";
  var ss = SpreadsheetApp.getActive().getSheetByName("Sheet1");  // Email, Name, Birthday
  var data = ss.getDataRange().getValues();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    var url = template.replace('##Name##',escape(data[i][1]))
                      .replace('##Birthday##',data[i][2].yyyymmdd());  // see yyyymmdd below
    Logger.log(url);  // You could do something more useful here.
  }
};

This is effective enough - you could email the pre-filled URL to each person, and they'd have some questions already filled in.

betterBuildUrls()

Instead of creating our template using brute force, we can piece it together programmatically. This will have the advantage that we can re-use the code without needing to remember to change the template.

Each question in a form is an item. For this example, let's assume the form has only 4 questions, as you've described them. Item [0] is "Name", [1] is "Birthday", and so on.

We can create a form response, which we won't submit - instead, we'll partially complete the form, only to get the pre-filled form URL. Since the Forms API understands the data types of each item, we can avoid manipulating the string format of dates and other types, which simplifies our code somewhat.

(EDIT: There's a more general version of this in How to prefill Google form checkboxes?)

/**
 * Use Form API to generate pre-filled form URLs
 */
function betterBuildUrls() {
  var ss = SpreadsheetApp.getActive();
  var sheet = ss.getSheetByName("Sheet1");
  var data = ss.getDataRange().getValues();  // Data for pre-fill

  var formUrl = ss.getFormUrl();             // Use form attached to sheet
  var form = FormApp.openByUrl(formUrl);
  var items = form.getItems();

  // Skip headers, then build URLs for each row in Sheet1.
  for (var i = 1; i < data.length; i++ ) {
    // Create a form response object, and prefill it
    var formResponse = form.createResponse();

    // Prefill Name
    var formItem = items[0].asTextItem();
    var response = formItem.createResponse(data[i][1]);
    formResponse.withItemResponse(response);

    // Prefill Birthday
    formItem = items[1].asDateItem();
    response = formItem.createResponse(data[i][2]);
    formResponse.withItemResponse(response);

    // Get prefilled form URL
    var url = formResponse.toPrefilledUrl();
    Logger.log(url);  // You could do something more useful here.
  }
};

yymmdd Function

Any date item in the pre-filled form URL is expected to be in this format: yyyy-mm-dd. This helper function extends the Date object with a new method to handle the conversion.

When reading dates from a spreadsheet, you'll end up with a javascript Date object, as long as the format of the data is recognizable as a date. (Your example is not recognizable, so instead of May 9th 1975 you could use 5/9/1975.)

// From http://blog.justin.kelly.org.au/simple-javascript-function-to-format-the-date-as-yyyy-mm-dd/
Date.prototype.yyyymmdd = function() {
  var yyyy = this.getFullYear().toString();                                    
  var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based         
  var dd  = this.getDate().toString();             

  return yyyy + '-' + (mm[1]?mm:"0"+mm[0]) + '-' + (dd[1]?dd:"0"+dd[0]);
};

Assuming you don't want to create another class, you can always let the deserializer give you a dictionary of key-value-pairs, like so:

string s = //{ "user" : {    "id" : 12345,    "screen_name" : "twitpicuser"}};
var serializer = new JavaScriptSerializer();
var result = serializer.DeserializeObject(s);

You'll get back something, where you can do:

var userId = int.Parse(result["user"]["id"]); // or (int)result["user"]["id"] depending on how the JSON is serialized.
// etc.

Look at result in the debugger to see, what's in there.

To be honest I like the OP's first way of actually starting it with a NULL value and then checking it with is.null (primarily because it is very simply and easy to understand). It maybe depends on the way people are used to coding but the Hadley seems to support the is.null way too:

From Hadley's book "Advanced-R" Chapter 6, Functions, p.84 (for the online version check here):

You can determine if an argument was supplied or not with the missing() function.

i <- function(a, b) {
  c(missing(a), missing(b))
}
i()
#> [1] TRUE TRUE
i(a = 1)
#> [1] FALSE  TRUE
i(b = 2)
#> [1]  TRUE FALSE
i(1, 2)
#> [1] FALSE FALSE

Sometimes you want to add a non-trivial default value, which might take several lines of code to compute. Instead of inserting that code in the function definition, you could use missing() to conditionally compute it if needed. However, this makes it hard to know which arguments are required and which are optional without carefully reading the documentation. Instead, I usually set the default value to NULL and use is.null() to check if the argument was supplied.

Thanks above all of you contributions! however for my case I finally realized that my dependency above "spring-web" was destroyed on my .m2/repository/org/springframework/spring-web, I just deleted the folder and update Maven again. it got fixed.

In case anyone finds this useful, I've made Rob W's answer into a function that returns the browser string rather than having multiple variables floating about. Since the browser also can't really change without loading all over again, I've made it cache the result to prevent it from needing to work it out the next time the function is called.

/**_x000D_
 * Gets the browser name or returns an empty string if unknown. _x000D_
 * This function also caches the result to provide for any _x000D_
 * future calls this function has._x000D_
 *_x000D_
 * @returns {string}_x000D_
 */_x000D_
var browser = function() {_x000D_
    // Return cached result if avalible, else get result then cache it._x000D_
    if (browser.prototype._cachedResult)_x000D_
        return browser.prototype._cachedResult;_x000D_
_x000D_
    // Opera 8.0+_x000D_
    var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;_x000D_
_x000D_
    // Firefox 1.0+_x000D_
    var isFirefox = typeof InstallTrigger !== 'undefined';_x000D_
_x000D_
    // Safari 3.0+ "[object HTMLElementConstructor]" _x000D_
    var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || safari.pushNotification);_x000D_
_x000D_
    // Internet Explorer 6-11_x000D_
    var isIE = /*@cc_on!@*/false || !!document.documentMode;_x000D_
_x000D_
    // Edge 20+_x000D_
    var isEdge = !isIE && !!window.StyleMedia;_x000D_
_x000D_
    // Chrome 1+_x000D_
    var isChrome = !!window.chrome && !!window.chrome.webstore;_x000D_
_x000D_
    // Blink engine detection_x000D_
    var isBlink = (isChrome || isOpera) && !!window.CSS;_x000D_
_x000D_
    return browser.prototype._cachedResult =_x000D_
        isOpera ? 'Opera' :_x000D_
        isFirefox ? 'Firefox' :_x000D_
        isSafari ? 'Safari' :_x000D_
        isChrome ? 'Chrome' :_x000D_
        isIE ? 'IE' :_x000D_
        isEdge ? 'Edge' :_x000D_
        isBlink ? 'Blink' :_x000D_
        "Don't know";_x000D_
};_x000D_
_x000D_
console.log(browser());

Try this:

if(Math.floor(id) == id && $.isNumeric(id)) 
  alert('yes its an int!');

$.isNumeric(id) checks whether it's numeric or not
Math.floor(id) == id will then determine if it's really in integer value and not a float. If it's a float parsing it to int will give a different result than the original value. If it's int both will be the same.

Using inline-block allows for white-space in your HTML, This usually equates to .25em (or 4px).

You can either comment out the white-space or, a more commons solution, is to set the parent's font-size to 0 and the reset it back to the required size on the inline-block elements.

if you have table and fields on database you can simply use this command :

php artisan db:seed --class=UsersTableSeeder --database=YOURDATABSE

Try with:

 string Camnr, Klantnr, Ordernr, Bonnr, Volgnr, Omschrijving;
 Camnr = Klantnr = Ordernr = Bonnr = Volgnr = Omschrijving = string.Empty;

Like this:

>>>mystr = "abcdefghijkl"
>>>mystr[-4:]
'ijkl'

This slices the string's last 4 characters. The -4 starts the range from the string's end. A modified expression with [:-4] removes the same 4 characters from the end of the string:

>>>mystr[:-4]
'abcdefgh'

For more information on slicing see this Stack Overflow answer.

HH used 24 hour format while hh used for 12 format

Simple and fast for all cases:

CREATE TEMPORARY TABLE IF NOT EXISTS _temp_duplicates AS (SELECT dub.id FROM table_with_duplications dub GROUP BY dub.field_must_be_uniq_1, dub.field_must_be_uniq_2 HAVING COUNT(*)  > 1);

DELETE FROM table_with_duplications WHERE id IN (SELECT id FROM _temp_duplicates);

There is not currently any way to style HTML5 <audio> players using CSS. Instead, you can leave off the control attribute, and implement your own controls using Javascript. If you don't want to implement them all on your own, I'd recommend using an existing themeable HTML5 audio player, such as jPlayer.

You can escape (this is how this principle is called) the double quotes by prefixing them with another double quote. You can put them in a string as follows:

Dim MyVar as string = "some text ""hello"" "

This will give the MyVar variable a value of some text "hello".

Use pyplot.text() (import matplotlib.pyplot as plt)

import matplotlib.pyplot as plt

x=[1,2,3]
y=[9,8,7]

plt.plot(x,y)
for a,b in zip(x, y): 
    plt.text(a, b, str(b))
plt.show()

The Java runtime you try to execute your program with is an earlier version than Java 7 which was the target you compile your program for.

For Ubuntu use

apt-get install openjdk-7-jdk

to get Java 7 as default. You may have to uninstall openjdk-6 first.

How about:

Supplier<Stream<Integer>> randomIntsStreamSupplier =
    () -> (new Random()).ints(0, 2).boxed();

Stream<Integer> tails =
    randomIntsStreamSupplier.get().filter(x->x.equals(0));
Stream<Integer> heads =
    randomIntsStreamSupplier.get().filter(x->x.equals(1));

If you insist on deleting it:

git remote remove origin

Or if you have Git version 1.7.10 or older

git remote rm origin

But kahowell's answer is better.

I'll give you one nice function for this problem:

function url_redirect(url){
    var X = setTimeout(function(){
        window.location.replace(url);
        return true;
    },300);

    if( window.location = url ){
        clearTimeout(X);
        return true;
    } else {
        if( window.location.href = url ){
            clearTimeout(X);
            return true;
        }else{
            clearTimeout(X);
            window.location.replace(url);
            return true;
        }
    }
    return false;
};

This is universal working solution for the window.location problem. Some browsers go into problem with window.location.href and also sometimes can happen that window.location fail. That's why we also use window.location.replace() for any case and timeout for the "last try".

It worked for = I just removed "archetypes" folder from below location

C:\Users\Lenovo.m2\repository\org\apache\maven

But you may change following for experiment - download latest binary zip of Maven, add to you C:\ drive and change following....

Change Proxy

 <proxy>
          <id>optional</id>
          <active>true</active>
          <protocol>http</protocol>
          <username></username>
          <password></password>
          <host>10.23.73.253</host>
          <port>8080</port>
          <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
        </proxy>

The functions Math.round() and .toFixed() is meant to round to the nearest integer. You'll get incorrect results when dealing with decimals and using the "multiply and divide" method for Math.round() or parameter for .toFixed(). For example, if you try to round 1.005 using Math.round(1.005 * 100) / 100 then you'll get the result of 1, and 1.00 using .toFixed(2) instead of getting the correct answer of 1.01.

You can use following to solve this issue:

Number(Math.round(100 - (price / listprice) * 100 + 'e2') + 'e-2');

Add .toFixed(2) to get the two decimal places you wanted.

Number(Math.round(100 - (price / listprice) * 100 + 'e2') + 'e-2').toFixed(2);

You could make a function that will handle the rounding for you:

function round(value, decimals) {
    return Number(Math.round(value + 'e' + decimals) + 'e-' + decimals);
}

Example: https://jsfiddle.net/k5tpq3pd/36/

Alternativ

You can add a round function to Number using prototype. I would not suggest adding .toFixed() here as it would return a string instead of number.

Number.prototype.round = function(decimals) {
    return Number((Math.round(this + "e" + decimals)  + "e-" + decimals));
}

and use it like this:

var numberToRound = 100 - (price / listprice) * 100;
numberToRound.round(2);
numberToRound.round(2).toFixed(2); //Converts it to string with two decimals

Example https://jsfiddle.net/k5tpq3pd/35/

Source: http://www.jacklmoore.com/notes/rounding-in-javascript/

The default scope is package-private. All classes in the same package can access the method/field/class. Package-private is stricter than protected and public scopes, but more permissive than private scope.

More information:
http://docs.oracle.com/javase/tutorial/java/javaOO/accesscontrol.html
http://mindprod.com/jgloss/scope.html

See here: Cross Browser favicon

Thats the way to go:

<link rel="icon" type="image/png" href="http://www.example.com/image.png"><!-- Major Browsers -->
<!--[if IE]><link rel="SHORTCUT ICON" href="http://www.example.com/alternateimage.ico"/><![endif]--><!-- Internet Explorer-->

As always the best solution is to use recursion:

loop(document);
function loop(node){
    // do some thing with the node here
    var nodes = node.childNodes;
    for (var i = 0; i <nodes.length; i++){
        if(!nodes[i]){
            continue;
        }

        if(nodes[i].childNodes.length > 0){
            loop(nodes[i]);
        }
    }
}

Unlike other suggestions, this solution does not require you to create an array for all the nodes, so its more light on the memory. More importantly, it finds more results. I am not sure what those results are, but when testing on chrome it finds about 50% more nodes compared to document.getElementsByTagName("*");

You can sum the whole DataFrame and divide by the state total:

# Copying setup from Paul H answer
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
               'office_id': list(range(1, 7)) * 2,
               'sales': [np.random.randint(100000, 999999) for _ in range(12)]})
# Add a column with the sales divided by state total sales.
df['sales_ratio'] = (df / df.groupby(['state']).transform(sum))['sales']

df

Returns

    office_id   sales state  sales_ratio
0           1  405711    CA     0.193319
1           2  535829    WA     0.347072
2           3  217952    CO     0.198743
3           4  252315    AZ     0.192500
4           5  982371    CA     0.468094
5           6  459783    WA     0.297815
6           1  404137    CO     0.368519
7           2  222579    AZ     0.169814
8           3  710581    CA     0.338587
9           4  548242    WA     0.355113
10          5  474564    CO     0.432739
11          6  835831    AZ     0.637686

But note that this only works because all columns other than state are numeric, enabling summation of the entire DataFrame. For example, if office_id is character instead, you get an error:

df.office_id = df.office_id.astype(str)
df['sales_ratio'] = (df / df.groupby(['state']).transform(sum))['sales']

TypeError: unsupported operand type(s) for /: 'str' and 'str'

In many applications, like MsOffice (until version 2000 or 2002), the maximum number of characters per cell was 255. Moving data from programs able of handling more than 255 characters per field to/from those applications was a nightmare. Currently, the limit is less and less hindering.

It will work in IE7. But here you need to fixed the size less than the number of option and not use overflow-y:scroll. In your example you have 2 option but you set size=10, which will not work.

Suppose your select has 10 option, then fixed size=9.

Here, in your code reference you used height:100px with size:2. I remove the height css, because its not necessary and change the size:5 and it works fine.

Here is your modified code from jsfiddle:

<select size="5" style="width:100px;">
 <option>1</option>
 <option>2</option>
 <option>3</option>
 <option>4</option>
 <option>5</option>
 <option>6</option>
</select>

this will generate a larger select box than size:2 create.In case of small size the select box will not display the scrollbar,you have to check with appropriate size quantity.Without scrollbar it will work if click on the upper and lower icons of scrollbar.I show both example in your fiddle with size:2 and size greater than 2(e.g: 3,5).

Here is your desired result. I think this will help you:

CSS

  .wrapper{
    border: 1px dashed red;
    height: 150px;
    overflow-x: hidden;
    overflow-y: scroll;
    width: 150px;
 }
 .wrapper .selection{
   width:150px;
   border:1px solid #ccc
 }

HTML

<div class="wrapper">
<select size="15" class="selection">
    <option>Item 1</option>
    <option>Item 2</option>
    <option>Item 3</option>
</select>
</div>