This is the simplest way to get unix time:

use Time::Local;
timelocal($second,$minute,$hour,$day,$month-1,$year);

Note the reverse order of the arguments and that January is month 0. For many more options, see the DateTime module from CPAN.

As for parsing, see the Date::Parse module from CPAN. If you really need to get fancy with date parsing, the Date::Manip may be helpful, though its own documentation warns you away from it since it carries a lot of baggage (it knows things like common business holidays, for example) and other solutions are much faster.

If you happen to know something about the format of the date/times you'll be parsing then a simple regular expression may suffice but you're probably better off using an appropriate CPAN module. For example, if you know the dates will always be in YMDHMS order, use the CPAN module DateTime::Format::ISO8601.

For my own reference, if nothing else, below is a function I use for an application where I know the dates will always be in YMDHMS order with all or part of the "HMS" part optional. It accepts any delimiters (eg, "2009-02-15" or "2009.02.15"). It returns the corresponding unix time (seconds since 1970-01-01 00:00:00 GMT) or -1 if it couldn't parse it (which means you better be sure you'll never legitimately need to parse the date 1969-12-31 23:59:59). It also presumes two-digit years XX up to "69" refer to "20XX", otherwise "19XX" (eg, "50-02-15" means 2050-02-15 but "75-02-15" means 1975-02-15).

use Time::Local;

sub parsedate { 
  my($s) = @_;
  my($year, $month, $day, $hour, $minute, $second);

  if($s =~ m{^\s*(\d{1,4})\W*0*(\d{1,2})\W*0*(\d{1,2})\W*0*
                 (\d{0,2})\W*0*(\d{0,2})\W*0*(\d{0,2})}x) {
    $year = $1;  $month = $2;   $day = $3;
    $hour = $4;  $minute = $5;  $second = $6;
    $hour |= 0;  $minute |= 0;  $second |= 0;  # defaults.
    $year = ($year<100 ? ($year<70 ? 2000+$year : 1900+$year) : $year);
    return timelocal($second,$minute,$hour,$day,$month-1,$year);  
  }
  return -1;
}

Do you mean search and replace a string in all files matched by grep?

perl -p -i -e 's/oldstring/newstring/g' `grep -ril searchpattern *`

Edit

Since this seems to be a fairly popular question thought I'd update.

Nowadays I mostly use ack-grep as it's more user-friendly. So the above command would be:

perl -p -i -e 's/old/new/g' `ack -l searchpattern`

To handle whitespace in file names you can run:

ack --print0 -l searchpattern | xargs -0 perl -p -i -e 's/old/new/g'

you can do more with ack-grep. Say you want to restrict the search to HTML files only:

ack --print0 --html -l searchpattern | xargs -0 perl -p -i -e 's/old/new/g'

And if white space is not an issue it's even shorter:

perl -p -i -e 's/old/new/g' `ack -l --html searchpattern`
perl -p -i -e 's/old/new/g' `ack -f --html` # will match all html files

Or File::Find

use File::Find;
finddepth(\&wanted, '/some/path/to/dir');
sub wanted { print };

It'll go through subdirectories if they exist.

You might want a variant of exists ... perldoc -f "-f"

      -X FILEHANDLE
       -X EXPR
       -X DIRHANDLE
       -X      A file test, where X is one of the letters listed below.  This unary operator takes one argument,
               either a filename, a filehandle, or a dirhandle, and tests the associated file to see if something is
               true about it.  If the argument is omitted, tests $_, except for "-t", which tests STDIN.  Unless
               otherwise documented, it returns 1 for true and '' for false, or the undefined value if the file
               doesn’t exist.  Despite the funny names, precedence is the same as any other named unary operator.
               The operator may be any of:

                   -r  File is readable by effective uid/gid.
                   -w  File is writable by effective uid/gid.
                   -x  File is executable by effective uid/gid.
                   -o  File is owned by effective uid.

                   -R  File is readable by real uid/gid.
                   -W  File is writable by real uid/gid.
                   -X  File is executable by real uid/gid.
                   -O  File is owned by real uid.

                   -e  File exists.
                   -z  File has zero size (is empty).
                   -s  File has nonzero size (returns size in bytes).

                   -f  File is a plain file.
                   -d  File is a directory.
                   -l  File is a symbolic link.
                   -p  File is a named pipe (FIFO), or Filehandle is a pipe.
                   -S  File is a socket.
                   -b  File is a block special file.
                   -c  File is a character special file.
                   -t  Filehandle is opened to a tty.

                   -u  File has setuid bit set.
                   -g  File has setgid bit set.
                   -k  File has sticky bit set.

                   -T  File is an ASCII text file (heuristic guess).
                   -B  File is a "binary" file (opposite of -T).

                   -M  Script start time minus file modification time, in days.

A variation on Greg’s answer that includes carriage returns too:

/[^\S\r\n]/

This regex is safer than /[^\S\n]/ with no \r. My reasoning is that Windows uses \r\n for newlines, and Mac OS 9 used \r. You’re unlikely to find \r without \n nowadays, but if you do find it, it couldn’t mean anything but a newline. Thus, since \r can mean a newline, we should exclude it too.

Thanks, finally got an solution to not put utf8::encode all over code. To synthesize and complete for other cases, like write and read files in utf8 and also works with LoadFile of an YAML file in utf8

use utf8;
use open ':encoding(utf8)';
binmode(STDOUT, ":utf8");

open(FH, ">test.txt"); 
print FH "something éá";

use YAML qw(LoadFile Dump);
my $PUBS = LoadFile("cache.yaml");
my $f = "2917";
my $ref = $PUBS->{$f};
print "$f \"".$ref->{name}."\" ". $ref->{primary_uri}." ";

where cache.yaml is:

---
2917:
  id: 2917
  name: Semanário
  primary_uri: 2917.xml

print "bla: ", $myvar =~ tr{a}{b},"\n";

Even though it's convenient to use, it seems like the convert-to-hash solution costs quite a lot of performance, which was an issue for me.

#!/usr/bin/perl
use Benchmark;
my @list;
for (1..10_000) {
    push @list, $_;
}

timethese(10000, {
  'grep'    => sub {
            if ( grep(/^5000$/o, @list) ) {
                # code
            }
        },
  'hash'    => sub {
            my %params = map { $_ => 1 } @list;
            if ( exists($params{5000}) ) {
                # code
            }
        },
});

Output of benchmark test:

Benchmark: timing 10000 iterations of grep, hash...
          grep:  8 wallclock secs ( 7.95 usr +  0.00 sys =  7.95 CPU) @ 1257.86/s (n=10000)
          hash: 50 wallclock secs (49.68 usr +  0.01 sys = 49.69 CPU) @ 201.25/s (n=10000)

Use -d (full list of file tests)

if (-d "cgi-bin") {
    # directory called cgi-bin exists
}
elsif (-e "cgi-bin") {
    # cgi-bin exists but is not a directory
}
else {
    # nothing called cgi-bin exists
}

As a note, -e doesn't distinguish between files and directories. To check if something exists and is a plain file, use -f.

You could look into psh here: http://gnp.github.io/psh/

It's a full on shell (you can use it in replacement of bash for example), but uses perl syntax.. so you can create methods on the fly etc.

The rule of thumb is to use the function most suited to your needs.

If you just want the keys and do not plan to ever read any of the values, use keys():

foreach my $key (keys %hash) { ... }

If you just want the values, use values():

foreach my $val (values %hash) { ... }

If you need the keys and the values, use each():

keys %hash; # reset the internal iterator so a prior each() doesn't affect the loop
while(my($k, $v) = each %hash) { ... }

If you plan to change the keys of the hash in any way except for deleting the current key during the iteration, then you must not use each(). For example, this code to create a new set of uppercase keys with doubled values works fine using keys():

%h = (a => 1, b => 2);

foreach my $k (keys %h)
{
  $h{uc $k} = $h{$k} * 2;
}

producing the expected resulting hash:

(a => 1, A => 2, b => 2, B => 4)

But using each() to do the same thing:

%h = (a => 1, b => 2);

keys %h;
while(my($k, $v) = each %h)
{
  $h{uc $k} = $h{$k} * 2; # BAD IDEA!
}

produces incorrect results in hard-to-predict ways. For example:

(a => 1, A => 2, b => 2, B => 8)

This, however, is safe:

keys %h;
while(my($k, $v) = each %h)
{
  if(...)
  {
    delete $h{$k}; # This is safe
  }
}

All of this is described in the perl documentation:

% perldoc -f keys
% perldoc -f each

There are a lot of ways you can call a shell command from a Perl script, such as:

1. back tick ls which captures the output and gives back to you.
2. system system('ls');
3. open

Refer #17 here: Perl programming tips

perl -pe 'chomp if eof' filename >filename2

or, to edit the file in place:

perl -pi -e 'chomp if eof' filename

^{[Editor's note: -pi -e was originally -pie, but, as noted by several commenters and explained by @hvd, the latter doesn't work.]}

This was described as a 'perl blasphemy' on the awk website I saw.

But, in a test, it worked.

And if you'd like to extract the differences between the two strings, you can use String::Diff.

In your example, you can just go:

chomp(@lines);

Or:

$_=join("", @lines);
s/[\r\n]+//g;

Or:

@lines = split /[\r\n]+/, join("", @lines);

Using these directly on a file:

perl -e '$_=join("",<>); s/[\r\n]+//g; print' <a.txt |less

perl -e 'chomp(@a=<>);print @a' <a.txt |less

Little script I have for that. A modification of it helped to filter out some other non-printable characters in cross-platform legacy files.

#!/usr/bin/perl
# run this as
# convert_dos2unix.pl < input_file > output_file
undef $/;
$_ = <>;
s/\r//ge;
print;

I was facing the same issue. After many tries below solution worked for me.

Before installing VC++ install your windows updates. 1. Go to Start - Control Panel - Windows Update 2. Check for the updates. 3. Install all updates. 4. Restart your system.

After that you can follow the below steps.

@ABHI KUMAR

Download the Visual C++ Redistributable 2015

Visual C++ Redistributable for Visual Studio 2015 (64-bit)

Visual C++ Redistributable for Visual Studio 2015 (32-bit)

(Reinstal if already installed) then restart your computer or use windows updates for download auto.

For link download https://www.microsoft.com/de-de/download/details.aspx?id=48145.

I like polymorphism instead of manually checking for something:

use MooseX::Declare;

class Foo {
    use MooseX::MultiMethods;

    multi method foo (ArrayRef $arg){ say "arg is an array" }
    multi method foo (HashRef $arg) { say "arg is a hash" }
    multi method foo (Any $arg)     { say "arg is something else" }
}

Foo->new->foo([]); # arg is an array
Foo->new->foo(40); # arg is something else

This is much more powerful than manual checking, as you can reuse your "checks" like you would any other type constraint. That means when you want to handle arrays, hashes, and even numbers less than 42, you just write a constraint for "even numbers less than 42" and add a new multimethod for that case. The "calling code" is not affected.

Your type library:

package MyApp::Types;
use MooseX::Types -declare => ['EvenNumberLessThan42'];
use MooseX::Types::Moose qw(Num);

subtype EvenNumberLessThan42, as Num, where { $_ < 42 && $_ % 2 == 0 };

Then make Foo support this (in that class definition):

class Foo {
    use MyApp::Types qw(EvenNumberLessThan42);

    multi method foo (EvenNumberLessThan42 $arg) { say "arg is an even number less than 42" }
}

Then Foo->new->foo(40) prints arg is an even number less than 42 instead of arg is something else.

Maintainable.

Deparse tells us this is what is being executed:

$find = 'start (.*) end';
$replace = "foo \cA bar";
$var = 'start middle end';
$var =~ s/$find/$replace/;

However,

 /$find/foo \1 bar/

Is interpreted as :

$var =~ s/$find/foo $1 bar/;

Unfortunately it appears there is no easy way to do this.

You can do it with a string eval, but thats dangerous.

The most sane solution that works for me was this:

$find = "start (.*) end"; 
$replace = 'foo \1 bar';

$var = "start middle end"; 

sub repl { 
    my $find = shift; 
    my $replace = shift; 
    my $var = shift;

    # Capture first 
    my @items = ( $var =~ $find ); 
    $var =~ s/$find/$replace/; 
    for( reverse 0 .. $#items ){ 
        my $n = $_ + 1; 
        #  Many More Rules can go here, ie: \g matchers  and \{ } 
        $var =~ s/\\$n/${items[$_]}/g ;
        $var =~ s/\$$n/${items[$_]}/g ;
    }
    return $var; 
}

print repl $find, $replace, $var; 

A rebuttal against the ee technique:

As I said in my answer, I avoid evals for a reason.

$find="start (.*) end";
$replace='do{ print "I am a dirty little hacker" while 1; "foo $1 bar" }';

$var = "start middle end";
$var =~ s/$find/$replace/ee;

print "var: $var\n";

this code does exactly what you think it does.

If your substitution string is in a web application, you just opened the door to arbitrary code execution.

Good Job.

Also, it WON'T work with taints turned on for this very reason.

$find="start (.*) end";
$replace='"' . $ARGV[0] . '"';

$var = "start middle end";
$var =~ s/$find/$replace/ee;

print "var: $var\n"


$ perl /tmp/re.pl  'foo $1 bar'
var: foo middle bar
$ perl -T /tmp/re.pl 'foo $1 bar' 
Insecure dependency in eval while running with -T switch at /tmp/re.pl line 10.

However, the more careful technique is sane, safe, secure, and doesn't fail taint. ( Be assured tho, the string it emits is still tainted, so you don't lose any security. )

As it was said already @INC is an array and you're free to add anything you want.

My CGI REST script looks like:

#!/usr/bin/perl
use strict;
use warnings;
BEGIN {
    push @INC, 'fully_qualified_path_to_module_wiht_our_REST.pm';
}
use Modules::Rest;
gone(@_);

Subroutine gone is exported by Rest.pm.

A .pl is a single script.

In .pm (Perl Module) you have functions that you can use from other Perl scripts:

A Perl module is a self-contained piece of Perl code that can be used by a Perl program or by other Perl modules. It is conceptually similar to a C link library, or a C++ class.

You can use sed:

sed 's/^[^ ][^ ]* [^ ][^ ]* //'

This looks for lines starting with one-or-more non-blanks, a blank, another set of one-or-more non-blanks and another blank, and deletes the matched material, aka the first two fields. The [^ ][^ ]* is marginally shorter than the equivalent but more explicit [^ ]\{1,\} notation, and the second might run into issues with GNU sed (though if you use --posix as an option, even GNU sed can't screw it up). OTOH, if the character class to be repeated was more complex, the numbered notation wins for brevity. It is easy to extend this to handle 'blank or tab' as separator, or 'multiple blanks' or 'multiple blanks or tabs'. It could also be modified to handle optional leading blanks (or tabs) before the first field, etc.

For awk and cut, see Sampson-Chen's answer. There are other ways to write the awk script, but they're not materially better than the answer given. Note that you might need to set the field separator explicitly (-F" ") in awk if you do not want tabs treated as separators, or you might have multiple blanks between fields. The POSIX standard cut does not support multiple separators between fields; GNU cut has the useful but non-standard -i option to allow for multiple separators between fields.

You can also do it in pure shell:

while read junk1 junk2 residue
do echo "$residue"
done < in-file > out-file

Here are a few options:

• In Perl, you can choose alternate delimiters. You're not confined to m//. You could choose another, such as m{}. Then escaping isn't necessary. As a matter of fact, Damian Conway in "Perl Best Practices" asserts that m{} is the only alternate delimiter that ought to be used, and this is reinforced by Perl::Critic (on CPAN). While you can get away with using a variety of alternate delimiter characters, // and {} seem to be the clearest to decipher later on. However, if either of those choices result in too much escaping, choose whichever one lends itself best to legibility. Common examples are m(...), m[...], and m!...!.

• In cases where you either cannot or prefer not to use alternate delimiters, you can escape the forward slashes with a backslash: m/\/[^/]+$/ for example (using an alternate delimiter that could become m{/[^/]+$}, which may read more clearly). Escaping the slash with a backslash is common enough to have earned a name and a wikipedia page: Leaning Toothpick Syndrome. In regular expressions where there's just a single instance, escaping a slash might not rise to the level of being considered a hindrance to legibility, but if it starts to get out of hand, and if your language permits alternate delimiters as Perl does, that would be the preferred solution.

The problem with __FILE__ is that it will print the core module ".pm" path not necessarily the ".cgi" or ".pl" script path that is running. I guess it depends on what your goal is.

It seems to me that Cwd just needs to be updated for mod_perl. Here is my suggestion:

my $path;

use File::Basename;
my $file = basename($ENV{SCRIPT_NAME});

if (exists $ENV{MOD_PERL} && ($ENV{MOD_PERL_API_VERSION} < 2)) {
  if ($^O =~/Win/) {
    $path = `echo %cd%`;
    chop $path;
    $path =~ s!\\!/!g;
    $path .= $ENV{SCRIPT_NAME};
  }
  else {
    $path = `pwd`;
    $path .= "/$file";
  }
  # add support for other operating systems
}
else {
  require Cwd;
  $path = Cwd::getcwd()."/$file";
}
print $path;

Please add any suggestions.

I got the error Can't open file for reading. Inappropriate ioctl for device recently when I migrated an old UB2K forum with a DBM file-based database to a new host. Apparently there are multiple, incompatible implementations of DBM. I had a backup of the database, so I was able to load that, but it seems there are other options e.g. moving a perl script/dbm to a new server, and shifting out of dbm?.

As numerous answers pointed out, the first and third way are the correct methods to get the array size, and the second way is not.

Here I expand on these answers with some usage examples.

@array_name evaluates to the length of the array = the size of the array = the number of elements in the array, when used in a scalar context.

Below are some examples of a scalar context, such as @array_name by itself inside if or unless, of in arithmetic comparisons such as == or !=.

All of these examples will work if you change @array_name to scalar(@array_name). This would make the code more explicit, but also longer and slightly less readable. Therefore, more idiomatic usage omitting scalar() is preferred here.

my @a = (undef, q{}, 0, 1);

# All of these test whether 'array' has four elements:
print q{array has four elements} if @a == 4;
print q{array has four elements} unless @a != 4;
@a == 4 and print q{array has four elements};
!(@a != 4) and print q{array has four elements};

# All of the above print:
# array has four elements

# All of these test whether array is not empty:
print q{array is not empty} if @a;
print q{array is not empty} unless !@a;
@a and print q{array is not empty};
!(!@a) and print q{array is not empty};

# All of the above print:
# array is not empty

It can be done using a single line:

perl -pi.back -e 's/oldString/newString/g;' inputFileName

Pay attention that oldString is processed as a Regular Expression.
In case the string contains any of {}[]()^$.|*+? (The special characters for Regular Expression syntax) make sure to escape them unless you want it to be processed as a regular expression.
Escaping it is done by \, so \[.

You can use the password_verify function with the PHP. It verifies that a password matches with the hash

password_verify ( string $password , string $hash ) : bool

more details: https://www.php.net/manual/en/function.password-verify.php

Check out perlfaq4: How do I merge two hashes. There is a lot of good information already in the Perl documentation and you can have it right away rather than waiting for someone else to answer it. :)

Before you decide to merge two hashes, you have to decide what to do if both hashes contain keys that are the same and if you want to leave the original hashes as they were.

If you want to preserve the original hashes, copy one hash (%hash1) to a new hash (%new_hash), then add the keys from the other hash (%hash2 to the new hash. Checking that the key already exists in %new_hash gives you a chance to decide what to do with the duplicates:

my %new_hash = %hash1; # make a copy; leave %hash1 alone

foreach my $key2 ( keys %hash2 )
    {
    if( exists $new_hash{$key2} )
        {
        warn "Key [$key2] is in both hashes!";
        # handle the duplicate (perhaps only warning)
        ...
        next;
        }
    else
        {
        $new_hash{$key2} = $hash2{$key2};
        }
    }

If you don't want to create a new hash, you can still use this looping technique; just change the %new_hash to %hash1.

foreach my $key2 ( keys %hash2 )
    {
    if( exists $hash1{$key2} )
        {
        warn "Key [$key2] is in both hashes!";
        # handle the duplicate (perhaps only warning)
        ...
        next;
        }
    else
        {
        $hash1{$key2} = $hash2{$key2};
        }
    }

If you don't care that one hash overwrites keys and values from the other, you could just use a hash slice to add one hash to another. In this case, values from %hash2 replace values from %hash1 when they have keys in common:

@hash1{ keys %hash2 } = values %hash2;

Simple:

if ( $name eq 'tom' && $password eq '123!'
    || $name eq 'frank' && $password eq '321!'
) {

(use the high-precedence && and || in expressions, reserving and and or for flow control, to avoid common precedence errors)

Better:

my %password = (
    'tom' => '123!',
    'frank' => '321!',
);

if ( exists $password{$name} && $password eq $password{$name} ) {

And let's not forget ActiveState's PDK. It will allow you to compile UI, command line, Windows services and installers.

I highly recommend it, it has served me very well over the years, but it is around 300$ for a licence.

  :: short answer :
  :: perl -MCPAN -e "install PAR::Packer" 
  pp -o <<DesiredExeName>>.exe <<MyFancyPerlScript>> 

  :: long answer - create the following cmd , adjust vars to your taste ...
  :: next_line_is_templatized
  :: file:compile-morphus.1.2.3.dev.ysg.cmd v1.0.0
  :: disable the echo
  @echo off

  :: this is part of the name of the file - not used
  set _Action=run

  :: the name of the Product next_line_is_templatized
  set _ProductName=morphus

  :: the version of the current Product next_line_is_templatized
  set _ProductVersion=1.2.3

  :: could be dev , test , dev , prod next_line_is_templatized
  set _ProductType=dev

  :: who owns this Product / environment next_line_is_templatized
  set _ProductOwner=ysg

  :: identifies an instance of the tool ( new instance for this version could be created by simply changing the owner )   
  set _EnvironmentName=%_ProductName%.%_ProductVersion%.%_ProductType%.%_ProductOwner%

  :: go the run dir
  cd %~dp0

  :: do 4 times going up
  for /L %%i in (1,1,5) do pushd ..

  :: The BaseDir is 4 dirs up than the run dir
  set _ProductBaseDir=%CD%
  :: debug echo BEFORE _ProductBaseDir is %_ProductBaseDir%
  :: remove the trailing \

  IF %_ProductBaseDir:~-1%==\ SET _ProductBaseDir=%_ProductBaseDir:~0,-1%
  :: debug echo AFTER _ProductBaseDir is %_ProductBaseDir%
  :: debug pause


  :: The version directory of the Product 
  set _ProductVersionDir=%_ProductBaseDir%\%_ProductName%\%_EnvironmentName%

  :: the dir under which all the perl scripts are placed
  set _ProductVersionPerlDir=%_ProductVersionDir%\sfw\perl

  :: The Perl script performing all the tasks
  set _PerlScript=%_ProductVersionPerlDir%\%_Action%_%_ProductName%.pl

  :: where the log events are stored 
  set _RunLog=%_ProductVersionDir%\data\log\compile-%_ProductName%.cmd.log

  :: define a favorite editor 
  set _MyEditor=textpad

  ECHO Check the variables 
  set _
  :: debug PAUSE
  :: truncate the run log
  echo date is %date% time is %time% > %_RunLog%


  :: uncomment this to debug all the vars 
  :: debug set  >> %_RunLog%

  :: for each perl pm and or pl file to check syntax and with output to logs
  for /f %%i in ('dir %_ProductVersionPerlDir%\*.pl /s /b /a-d' ) do echo %%i >> %_RunLog%&perl -wc %%i | tee -a  %_RunLog% 2>&1


  :: for each perl pm and or pl file to check syntax and with output to logs
  for /f %%i in ('dir %_ProductVersionPerlDir%\*.pm /s /b /a-d' ) do echo %%i >> %_RunLog%&perl -wc %%i | tee -a  %_RunLog% 2>&1

  :: now open the run log
  cmd /c start /max %_MyEditor% %_RunLog%


  :: this is the call without debugging
  :: old 
  echo CFPoint1  OK The run cmd script %0 is executed >> %_RunLog%
  echo CFPoint2  OK  compile the exe file  STDOUT and STDERR  to a single _RunLog file >> %_RunLog%
  cd %_ProductVersionPerlDir%

  pp -o %_Action%_%_ProductName%.exe %_PerlScript% | tee -a %_RunLog% 2>&1 

  :: open the run log
  cmd /c start /max %_MyEditor% %_RunLog%

  :: uncomment this line to wait for 5 seconds
  :: ping localhost -n 5

  :: uncomment this line to see what is happening 
  :: PAUSE

  ::
  :::::::
  :: Purpose: 
  :: To compile every *.pl file into *.exe file under a folder 
  :::::::
  :: Requirements : 
  :: perl , pp , win gnu utils tee 
  :: perl -MCPAN -e "install PAR::Packer" 
  :: text editor supporting <<textEditor>> <<FileNameToOpen>> cmd call syntax
  :::::::
  :: VersionHistory
  :: 1.0.0 --- 2012-06-23 12:05:45 --- ysg --- Initial creation from run_morphus.cmd
  :::::::
  :: eof file:compile-morphus.1.2.3.dev.ysg.cmd v1.0.0

I also use a positive lookahead to trim repeating spaces inside the text:

s/^\s+|\s(?=\s)|\s+$//g

Yeap, you just need to make . match newline :

$string =~ /(START)(.+?)(END)/s;

If a path may contain parentheses then the r'\(.*?\)' regex is not enough:

import os, re

def remove_parenthesized_chunks(path, safeext=True, safedir=True):
    dirpath, basename = os.path.split(path) if safedir else ('', path)
    name, ext = os.path.splitext(basename) if safeext else (basename, '')
    name = re.sub(r'\(.*?\)', '', name)
    return os.path.join(dirpath, name+ext)

By default the function preserves parenthesized chunks in directory and extention parts of the path.

Example:

>>> f = remove_parenthesized_chunks
>>> f("Example_file_(extra_descriptor).ext")
'Example_file_.ext'
>>> path = r"c:\dir_(important)\example(extra).ext(untouchable)"
>>> f(path)
'c:\\dir_(important)\\example.ext(untouchable)'
>>> f(path, safeext=False)
'c:\\dir_(important)\\example.ext'
>>> f(path, safedir=False)
'c:\\dir_\\example.ext(untouchable)'
>>> f(path, False, False)
'c:\\dir_\\example.ext'
>>> f(r"c:\(extra)\example(extra).ext", safedir=False)
'c:\\\\example.ext'

For those like me who have been groping your way through much-more-than-you-need-to-know-right-now tutorials and Docs, and just want to see the thing working for starters, I found the only thing I had to do was add:

AddHandler cgi-script .pl .cgi

To my configuration file.

http://httpd.apache.org/docs/2.2/mod/mod_mime.html#addhandler

For my situation this works best as I can put my perl script anywhere I want, and just add the .pl or .cgi extension.

Dave Sherohman's answer mentions the AddHandler solution also.

Of course you still must make sure the permissions/ownership on your script are set correctly, especially that the script will be executable. Take note of who the "user" is when run from an http request - eg, www or www-data.

All Perl's "special variables" are listed in the perlvar documentation page.

Quick and dirty:

#!/usr/bin/perl -w

use strict;

open(FILE, "</tmp/yourfile.txt") || die "File not found";
my @lines = <FILE>;
close(FILE);

foreach(@lines) {
   $_ =~ s/<PREF>/ABCD/g;
}

open(FILE, ">/tmp/yourfile.txt") || die "File not found";
print FILE @lines;
close(FILE);

Perhaps it i a good idea not to write the result back to your original file; instead write it to a copy and check the result first.

You can use quotemeta (\Q \E) if your Perl is version 5.16 or later, but if below you can simply avoid using a regular expression at all.

For example, by using the index command:

if (index($text_to_search, $search_string) > -1) {
    print "wee";
}

Probably this is an SELinux block. Try this:

# setsebool -P httpd_enable_cgi 1
# chcon -R -t httpd_sys_script_exec_t cgi-bin/your_script.cgi

Tie::File is what you need:

Synopsis

# This file documents Tie::File version 0.98
use Tie::File;

tie @array, 'Tie::File', 'filename' or die ...;

$array[13] = 'blah';     # line 13 of the file is now 'blah'
print $array[42];        # display line 42 of the file

$n_recs = @array;        # how many records are in the file?
$#array -= 2;            # chop two records off the end


for (@array) {
  s/PERL/Perl/g;         # Replace PERL with Perl everywhere in the file
}

# These are just like regular push, pop, unshift, shift, and splice
# Except that they modify the file in the way you would expect

push @array, new recs...;
my $r1 = pop @array;
unshift @array, new recs...;
my $r2 = shift @array;
@old_recs = splice @array, 3, 7, new recs...;

untie @array;            # all finished

If you write Perl with use strict;, then you'll find that the one line syntax isn't valid, even when declared.

With:

my ($newstring = $oldstring) =~ s/foo/bar/;

You get:

Can't declare scalar assignment in "my" at script.pl line 7, near ") =~"
Execution of script.pl aborted due to compilation errors.

Instead, the syntax that you have been using, while a line longer, is the syntactically correct way to do it with use strict;. For me, using use strict; is just a habit now. I do it automatically. Everyone should.

#!/usr/bin/env perl -wT

use strict;

my $oldstring = "foo one foo two foo three";
my $newstring = $oldstring;
$newstring =~ s/foo/bar/g;

print "$oldstring","\n";
print "$newstring","\n";

Either set $/ to undef (see jrockway's answer) or just concatenate all the file's lines:

$content = join('', <$fh>);

It's recommended to use scalars for filehandles on any Perl version that supports it.

What's wrong with using two regexs (or three)? This makes your intentions more clear and may even improve your performance:

if ($string =~ /^(Clinton|Reagan)/i && $string !~ /Bush/i) { ... }

if (($string =~ /^Clinton/i || $string =~ /^Reagan/i)
        && $string !~ /Bush/i) {
    print "$string\n"
}

I really like to sort the keys in one liner code:

print "$_ => $my_hash{$_}\n" for (sort keys %my_hash);

It can be done with a while loop (foreach doesn't support this):

my @arr = (1111, 2222, 3333);

while (my ($index, $element) = each(@arr))
{
   # You may need to "use feature 'say';"
   say "Index: $index, Element: $element";
}

Output:

Index: 0, Element: 1111
Index: 1, Element: 2222
Index: 2, Element: 3333

Perl version: 5.14.4

The easiest answer: jQuery. Do something like this:

$(document).ready(function(){
   var $form = $('form');
   $form.submit(function(){
      $.post($(this).attr('action'), $(this).serialize(), function(response){
            // do something here on success
      },'json');
      return false;
   });
});

If you want to add content dynamically and still need it to work, and also with more than one form, you can do this:

   $('form').live('submit', function(){
      $.post($(this).attr('action'), $(this).serialize(), function(response){
            // do something here on success
      },'json');
      return false;
   });

In your pg_hba.conf file, I see some incorrect and confusing lines:

# fine, this allows all dbs, all users, to be trusted from 192.168.0.1/32
# not recommend because of the lax permissions
host    all        all         192.168.0.1/32        trust

# wrong, /128 is an invalid netmask for ipv4, this line should be removed
host    all        all         192.168.0.1/128       trust

# this conflicts with the first line
# it says that that the password should be md5 and not plaintext
# I think the first line should be removed
host    all        all         192.168.0.1/32        md5

# this is fine except is it unnecessary because of the previous line
# which allows any user and any database to connect with md5 password
host    chaosLRdb  postgres    192.168.0.1/32        md5

# wrong, on local lines, an IP cannot be specified
# remove the 4th column
local   all        all         192.168.0.1/32        trust

I suspect that if you md5'd the password, this might work if you trim the lines. To get the md5 you can use perl or the following shell script:

 echo -n 'chaos123' | md5sum
 > d6766c33ba6cf0bb249b37151b068f10  -

So then your connect line would like something like:

my $dbh = DBI->connect("DBI:PgPP:database=chaosLRdb;host=192.168.0.1;port=5433",
    "chaosuser", "d6766c33ba6cf0bb249b37151b068f10");

For more information, here's the documentation of postgres 8.X's pg_hba.conf file.

For inspection/debugging check the Data::Printer module. It is meant to do one thing and one thing only:

display Perl variables and objects on screen, properly formatted (to be inspected by a human)

Example usage:

use Data::Printer;  
p @array;  # no need to pass references

The code above might output something like this (with colors!):

   [
       [0] "a",
       [1] "b",
       [2] undef,
       [3] "c",
   ]

int(x+.5) will round positive values toward the nearest integer. Rounding up is harder.

To round toward zero:

int($x)

For the solutions below, include the following statement:

use POSIX;

To round down: POSIX::floor($x)

To round up: POSIX::ceil($x)

To round away from zero: POSIX::floor($x) - int($x) + POSIX::ceil($x)

To round off to the nearest integer: POSIX::floor($x+.5)

Note that int($x+.5) fails badly for negative values. int(-2.1+.5) is int(-1.6), which is -1.

The number variables are the matches from the last successful match or substitution operator you applied:

my $string = 'abcdefghi';

if ($string =~ /(abc)def(ghi)/) {
    print "I found $1 and $2\n";
}

Always test that the match or substitution was successful before using $1 and so on. Otherwise, you might pick up the leftovers from another operation.

Perl regular expressions are documented in perlre.

It is not good to use this method but if you really want to split it with regex

<primaryAddress.*>((.|\n)*?)<\/primaryAddress>

the verified answer returns the tags but this just return the value between tags.

For string comparisons in Perl, use eq or ne:

if ($str eq "")
{
  // ...
}

The == and != operators are numeric comparison operators. They will attempt to convert both operands to integers before comparing them.

See the perlop man page for more information.

For Makefile.PL-based distributions, use the INSTALL_BASE option when generating Makefiles:

perl Makefile.PL INSTALL_BASE=/mydir/perl

I use:

delete $array[$index];

Perldoc delete.

I assume you want the PDF to display in the browser, rather than forcing a download. If that is the case, try setting the Content-Disposition header with a value of inline.

Also remember that this will also be affected by browser settings - some browsers may be configured to always download PDF files or open them in a different application (e.g. Adobe Reader)

You've misunderstood how character classes are used:

$varTemp =~ s/[\$#@~!&*()\[\];.,:?^ `\\\/]+//g;

does the same as your regex (assuming you didn't mean to remove ' characters from your strings).

Edit: The + allows several of those "special characters" to match at once, so it should also be faster.

I found it. Perl has multi-line comments:

#!/usr/bin/perl

use strict;

use warnings;

=for comment

Example of multiline comment.

Example of multiline comment.

=cut

print "Multi Line Comment Example \n";

I found this one to be very simple!

my $line = "file1.gz file2.gz file3.gz";

my @abc =  ($line =~ /(\w+[.]\w+)/g);

print $abc[0],"\n";
print $abc[1],"\n";
print $abc[2],"\n";

output:

file1.gz 
file2.gz 
file3.gz

Here take a look at this tutorial to find more on Perl regular expression and scroll down to More matching section.

Maybe the condition you are using is incorrect:

$str1 == "taste" && $str2 == "waste"

The program will enter into THEN part only when both of the stated conditions are true.

You can try with $str1 == "taste" || $str2 == "waste". This will execute the THEN part if anyone of the above conditions are true.

Output of perldoc -q round

Does Perl have a round() function? What about ceil() and floor()? Trig functions?

Remember that int() merely truncates toward 0. For rounding to a certain number of digits, sprintf() or printf() is usually the easiest route.

    printf("%.3f", 3.1415926535);       # prints 3.142

The POSIX module (part of the standard Perl distribution) implements ceil(), floor(), and a number of other mathematical and trigonometric functions.

    use POSIX;
    $ceil   = ceil(3.5);                        # 4
    $floor  = floor(3.5);                       # 3

In 5.000 to 5.003 perls, trigonometry was done in the Math::Complex module. With 5.004, the Math::Trig module (part of the standard Perl distribution) implements the trigonometric functions. Internally it uses the Math::Complex module and some functions can break out from the real axis into the complex plane, for example the inverse sine of 2.

Rounding in financial applications can have serious implications, and the rounding method used should be specified precisely. In these cases, it probably pays not to trust whichever system rounding is being used by Perl, but to instead implement the rounding function you need yourself.

To see why, notice how you'll still have an issue on half-way-point alternation:

    for ($i = 0; $i < 1.01; $i += 0.05) { printf "%.1f ",$i}

    0.0 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0.5 0.6 0.7 0.7
    0.8 0.8 0.9 0.9 1.0 1.0

Don't blame Perl. It's the same as in C. IEEE says we have to do this. Perl numbers whose absolute values are integers under 2**31 (on 32 bit machines) will work pretty much like mathematical integers. Other numbers are not guaranteed.

Alternatively, a sexier perlish way.....

my ($src, $dest) = @ARGV;

"Assumes" two values are passed. Extra code can verify the assumption is safe.

I would counsel against using if ($hash{$key}) since it will not do what you expect if the key exists but its value is zero or empty.

Here is how I made a script that could take either command line inputs or have a text file redirected.

if ($#ARGV < 1) {
    @ARGV = ();
    @ARGV = <>;
    chomp(@ARGV);
}

This will reassign the contents of the file to @ARGV, from there you just process @ARGV as if someone was including command line options.

WARNING

If no file is redirected, the program will sit their idle because it is waiting for input from STDIN.

I have not figured out a way to detect if a file is being redirected in yet to eliminate the STDIN issue.

Since you need to match content without including it in the result (must match name=" but it's not part of the desired result) some form of zero-width matching or group capturing is required. This can be done easily with the following tools:

Perl

With Perl you could use the n option to loop line by line and print the content of a capturing group if it matches:

perl -ne 'print "$1\n" if /name="(.*?)"/' filename

GNU grep

If you have an improved version of grep, such as GNU grep, you may have the -P option available. This option will enable Perl-like regex, allowing you to use \K which is a shorthand lookbehind. It will reset the match position, so anything before it is zero-width.

grep -Po 'name="\K.*?(?=")' filename

The o option makes grep print only the matched text, instead of the whole line.

Vim - Text Editor

Another way is to use a text editor directly. With Vim, one of the various ways of accomplishing this would be to delete lines without name= and then extract the content from the resulting lines:

:v/.*name="\v([^"]+).*/d|%s//\1

Standard grep

If you don't have access to these tools, for some reason, something similar could be achieved with standard grep. However, without the look around it will require some cleanup later:

grep -o 'name="[^"]*"' filename

A note about saving results

In all of the commands above the results will be sent to stdout. It's important to remember that you can always save them by piping it to a file by appending:

> result

to the end of the command.

@Mahender, you probably meant the difference between \W (instead of \w) and \b. If not, then I would agree with @BoltClock and @jwismar above. Otherwise continue reading.

\W would match any non-word character and so its easy to try to use it to match word boundaries. The problem is that it will not match the start or end of a line. \b is more suited for matching word boundaries as it will also match the start or end of a line. Roughly speaking (more experienced users can correct me here) \b can be thought of as (\W|^|$). [Edit: as @?mega mentions below, \b is a zero-length match so (\W|^|$) is not strictly correct, but hopefully helps explain the diff]

Quick example: For the string Hello World, .+\W would match Hello_ (with the space) but will not match World. .+\b would match both Hello and World.

you can also use: s.lower() in str.lower()

From the Perldoc page on sleep:

For delays of finer granularity than one second, the Time::HiRes module (from CPAN, and starting from Perl 5.8 part of the standard distribution) provides usleep().

Actually, it provides usleep() (which sleeps in microseconds) and nanosleep() (which sleeps in nanoseconds). You may want usleep(), which should let you deal with easier numbers. 1 millisecond sleep (using each):

use strict;
use warnings;

use Time::HiRes qw(usleep nanosleep);

# 1 millisecond == 1000 microseconds
usleep(1000);
# 1 microsecond == 1000 nanoseconds
nanosleep(1000000);

If you don't want to (or can't) load a module to do this, you may also be able to use the built-in select() function:

# Sleep for 250 milliseconds
select(undef, undef, undef, 0.25);

I think you're looking for the stat function (perldoc -f stat)

In particular, the 9th field (10th, index #9) of the returned list is the last modify time of the file in seconds since the epoch.

So:

my $last_modified = (stat($fh))[9];

Since at the time of installing of any module it mainly put corresponding .pm files in respective directories. So if you want to remove module only for some testing purpose or temporarily best is to find the path where module is stored using perldoc -l <MODULE> and then simply move the module from there to some other location. This approach can also be tried as a more permanent solution but i am not aware of any negative consequences as i do it mainly for testing.

EDIT: Putting the right solution first, originally from this question. It's the only one that searches relative to the module directory:

use FindBin;                 # locate this script
use lib "$FindBin::Bin/..";  # use the parent directory
use yourlib;

There's many other ways that search for libraries relative to the current directory. You can invoke perl with the -I argument, passing the directory of the other module:

perl -I.. yourscript.pl

You can include a line near the top of your perl script:

use lib '..';

You can modify the environment variable PERL5LIB before you run the script:

export PERL5LIB=$PERL5LIB:..

The push(@INC) strategy can also work, but it has to be wrapped in BEGIN{} to make sure that the push is run before the module search:

BEGIN {push @INC, '..'}
use yourlib;

To run your script under the Perl debugger you should use the -d switch:

perl -d script.pl

But Perl is flexible. It supplies some hooks, and you may force the debugger to work as you want

So to use different debuggers you may do:

perl -d:DebugHooks::Terminal script.pl
# OR
perl -d:Trepan script.pl

Look these modules here and here.

There are several most interesting Perl modules that hook into Perl debugger internals: Devel::NYTProf and Devel::Cover

And many others.

Additional data (in case you have more questions):

FOO: {
       for my $i ( @listone ){
          for my $j ( @listtwo ){
                 if ( cond( $i,$j ) ){

                    last FOO;  # --->
                                   # |
                 }                 # |
          }                        # |
       }                           # |
 } # <-------------------------------

If you like doing things the hard way:

my (undef,undef,undef,$mday,$mon,$year) = localtime;
$year = $year+1900;
$mon += 1;
if (length($mon)  == 1) {$mon = "0$mon";}
if (length($mday) == 1) {$mday = "0$mday";}
my $today = "$mon/$mday/$year";

upgrade

BTW there is a help command.

Here is a simple script that you can use. I like using the non-standard module File::chdir to handle managing cd operations, so to use this script as-is you will need to install it (sudo cpan File::chdir).

#!/usr/bin/perl

use strict;
use warnings;

use File::Copy;
use File::chdir; # allows cd-ing by use of $CWD, much easier but needs CPAN module

die "Usage: $0 dir prefix" unless (@ARGV >= 2);
my ($dir, $pre) = @ARGV;

opendir(my $dir_handle, $dir) or die "Cannot open directory $dir";
my @files = readdir($dir_handle);
close($dir_handle);

$CWD = $dir; # cd to the directory, needs File::chdir

foreach my $file (@files) {
  next if ($file =~ /^\.+$/); # avoid folders . and ..
  next if ($0 =~ /$file/); # avoid moving this script if it is in the directory

  move($file, $pre . $file) or warn "Cannot rename file $file: $!";
}

It isn't always possible to do repetitive things in a simple and elegant way.

Just do what you always do when you have common code that gets replicated across many projects:

Search CPAN, someone may have already the code for you. For this issue I found Scalar::MoreUtils.

If you don't find something you like on CPAN, make a module and put the code in a subroutine:

package My::String::Util;
use strict;
use warnings;
our @ISA = qw( Exporter );
our @EXPORT = ();
our @EXPORT_OK = qw( is_nonempty);

use Carp  qw(croak);

sub is_nonempty ($) {
    croak "is_nonempty() requires an argument" 
        unless @_ == 1;

    no warnings 'uninitialized';

    return( defined $_[0] and length $_[0] != 0 );
}

1;

=head1 BOILERPLATE POD

blah blah blah

=head3 is_nonempty

Returns true if the argument is defined and has non-zero length.    

More boilerplate POD.

=cut

Then in your code call it:

use My::String::Util qw( is_nonempty );

if ( is_nonempty $name ) {
    # do something with $name
}

Or if you object to prototypes and don't object to the extra parens, skip the prototype in the module, and call it like: is_nonempty($name).

The best way to decide questions like this to benchmark them:

use strict;
use warnings;
use Benchmark qw(:all);

our @input_array = (0..1000);

my $a = sub {
    my @array = @{[ @input_array ]};
    my $index = 0;
    foreach my $element (@array) {
       die unless $index == $element;
       $index++;
    }
};

my $b = sub {
    my @array = @{[ @input_array ]};
    my $index = 0;
    while (defined(my $element = shift @array)) {
       die unless $index == $element;
       $index++;
    }
};

my $c = sub {
    my @array = @{[ @input_array ]};
    my $index = 0;
    while (scalar(@array) !=0) {
       my $element = shift(@array);
       die unless $index == $element;
       $index++;
    }
};

my $d = sub {
    my @array = @{[ @input_array ]};
    foreach my $index (0.. $#array) {
       my $element = $array[$index];
       die unless $index == $element;
    }
};

my $e = sub {
    my @array = @{[ @input_array ]};
    for (my $index = 0; $index <= $#array; $index++) {
       my $element = $array[$index];
       die unless $index == $element;
    }
};

my $f = sub {
    my @array = @{[ @input_array ]};
    while (my ($index, $element) = each @array) {
       die unless $index == $element;
    }
};

my $count;
timethese($count, {
   '1' => $a,
   '2' => $b,
   '3' => $c,
   '4' => $d,
   '5' => $e,
   '6' => $f,
});

And running this on perl 5, version 24, subversion 1 (v5.24.1) built for x86_64-linux-gnu-thread-multi

I get:

Benchmark: running 1, 2, 3, 4, 5, 6 for at least 3 CPU seconds...
         1:  3 wallclock secs ( 3.16 usr +  0.00 sys =  3.16 CPU) @ 12560.13/s (n=39690)
         2:  3 wallclock secs ( 3.18 usr +  0.00 sys =  3.18 CPU) @ 7828.30/s (n=24894)
         3:  3 wallclock secs ( 3.23 usr +  0.00 sys =  3.23 CPU) @ 6763.47/s (n=21846)
         4:  4 wallclock secs ( 3.15 usr +  0.00 sys =  3.15 CPU) @ 9596.83/s (n=30230)
         5:  4 wallclock secs ( 3.20 usr +  0.00 sys =  3.20 CPU) @ 6826.88/s (n=21846)
         6:  3 wallclock secs ( 3.12 usr +  0.00 sys =  3.12 CPU) @ 5653.53/s (n=17639)

So the 'foreach (@Array)' is about twice as fast as the others. All the others are very similar.

@ikegami also points out that there are quite a few differences in these implimentations other than speed.

Google lead me here while searching on the same question phill asked (sorting floats) so I figured it would be worth posting the answer despite the thread being kind of old. I'm new to perl and am still getting my head wrapped around it but brian d foy's statement "Perl cares more about the verbs than it does the nouns." above really hits the nail on the head. You don't need to convert the strings to floats before applying the sort. You need to tell the sort to sort the values as numbers and not strings. i.e.

my @foo = ('1.2', '3.4', '2.1', '4.6');
my @foo_sort = sort {$a <=> $b} @foo;

See http://perldoc.perl.org/functions/sort.html for more details on sort

To find out if a string contains substring you can use the index function:

if (index($str, $substr) != -1) {
    print "$str contains $substr\n";
} 

It will return the position of the first occurrence of $substr in $str, or -1 if the substring is not found.

If you will be doing many searches of the array, AND matching always is defined as string equivalence, then you can normalize your data and use a hash.

my @strings = qw( aAa Bbb cCC DDD eee );

my %string_lut;

# Init via slice:
@string_lut{ map uc, @strings } = ();

# or use a for loop:
#    for my $string ( @strings ) {
#        $string_lut{ uc($string) } = undef;
#    }


#Look for a string:

my $search = 'AAa';

print "'$string' ", 
    ( exists $string_lut{ uc $string ? "IS" : "is NOT" ),
    " in the array\n";

Let me emphasize that doing a hash lookup is good if you are planning on doing many lookups on the array. Also, it will only work if matching means that $foo eq $bar, or other requirements that can be met through normalization (like case insensitivity).

What do you mean by "initialize an array to zero"? Arrays don't contain "zero" -- they can contain "zero elements", which is the same as "an empty list". Or, you could have an array with one element, where that element is a zero: my @array = (0);

my @array = (); should work just fine -- it allocates a new array called @array, and then assigns it the empty list, (). Note that this is identical to simply saying my @array;, since the initial value of a new array is the empty list anyway.

Are you sure you are getting an error from this line, and not somewhere else in your code? Ensure you have use strict; use warnings; in your module or script, and check the line number of the error you get. (Posting some contextual code here might help, too.)

As others have stated, you have to dereference the reference. The keys function requires that its argument starts with a %:

My preference:

foreach my $key (keys %{$ad_grp_ref}) {

According to Conway:

foreach my $key (keys %{ $ad_grp_ref }) {

Guess who you should listen to...

You might want to read through the Perl Reference Documentation.

If you find yourself doing a lot of stuff with references to hashes and hashes of lists and lists of hashes, you might want to start thinking about using Object Oriented Perl. There's a lot of nice little tutorials in the Perl documentation.

I think you misunderstand Unicode and its relationship to Perl. No matter which way you store data, Unicode, ISO-8859-1, or many other things, your program has to know how to interpret the bytes it gets as input (decoding) and how to represent the information it wants to output (encoding). Get that interpretation wrong and you garble the data. There isn't some magic default setup inside your program that's going to tell the stuff outside your program how to act.

You think it's hard, most likely, because you are used to everything being ASCII. Everything you should have been thinking about was simply ignored by the programming language and all of the things it had to interact with. If everything used nothing but UTF-8 and you had no choice, then UTF-8 would be just as easy. But not everything does use UTF-8. For instance, you don't want your input handle to think that it's getting UTF-8 octets unless it actually is, and you don't want your output handles to be UTF-8 if the thing reading from them can't handle UTF-8. Perl has no way to know those things. That's why you are the programmer.

I don't think Unicode in Perl 5 is too complicated. I think it's scary and people avoid it. There's a difference. To that end, I've put Unicode in Learning Perl, 6th Edition, and there's a lot of Unicode stuff in Effective Perl Programming. You have to spend the time to learn and understand Unicode and how it works. You're not going to be able to use it effectively otherwise.

Perl 6

say sum lines

~$ perl6 -e '.say for 0..1000000' > test.in

~$ perl6 -e 'say sum lines' < test.in
500000500000

I am now using this:

$ cat /etc/environment
...
LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8

Then log out of SSH session and log in again.

Old answer:

Only this helped me:

$ locale
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE=en_US.UTF-8
LC_NUMERIC=ru_RU.UTF-8
LC_TIME=ru_RU.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=ru_RU.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=ru_RU.UTF-8
LC_NAME=ru_RU.UTF-8
LC_ADDRESS=ru_RU.UTF-8
LC_TELEPHONE=ru_RU.UTF-8
LC_MEASUREMENT=ru_RU.UTF-8
LC_IDENTIFICATION=ru_RU.UTF-8
LC_ALL=

$ sudo su

# export LANGUAGE=en_US.UTF-8
# export LANG=en_US.UTF-8
# export LC_ALL=en_US.UTF-8

# locale-gen en_US.UTF-8
Generating locales...
  en_US.UTF-8... up-to-date
Generation complete.

# dpkg-reconfigure locales
Generating locales...
  en_AG.UTF-8... done
  en_AU.UTF-8... done
  en_BW.UTF-8... done
  en_CA.UTF-8... done
  en_DK.UTF-8... done
  en_GB.UTF-8... done
  en_HK.UTF-8... done
  en_IE.UTF-8... done
  en_IN.UTF-8... done
  en_NG.UTF-8... done
  en_NZ.UTF-8... done
  en_PH.UTF-8... done
  en_SG.UTF-8... done
  en_US.UTF-8... up-to-date
  en_ZA.UTF-8... done
  en_ZM.UTF-8... done
  en_ZW.UTF-8... done
Generation complete.

# exit

$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8

#!/usr/bin/perl
use utf8                       ;
use 5.10.1                     ;
use strict                     ;
use autodie                    ;
use warnings FATAL => q  ?all?;
binmode STDOUT     => q ?:utf8?;                  END {
close   STDOUT                 ;                     }
our    $FOLIO      =  q + SnPmaster.txt +            ;
open    FOLIO                  ;                 END {
close   FOLIO                  ;                     }
binmode FOLIO      => q{       :crlf
                               :encoding(CP-1252)    };
while (<FOLIO>)  { print       ;                     }
       continue  { ${.} ^015^  __LINE__  ||   exit   }
                                                                                                                                                                                                                                              __END__
unlink  $FOLIO                 ;
unlink ~$HOME ||
  clri ~$HOME                  ;
reboot                         ;

Previous answers pretty much summarize the possible ways of accomplishing this task.

However, I suggest a modification for those who don't care about counting the duplicates, but do care about order.

my @record = qw( yeah I mean uh right right uh yeah so well right I maybe );
my %record;
print grep !$record{$_} && ++$record{$_}, @record;

Note that the previously suggested grep !$seen{$_}++ ... increments $seen{$_} before negating, so the increment occurs regardless of whether it has already been %seen or not. The above, however, short-circuits when $record{$_} is true, leaving what's been heard once 'off the %record'.

You could also go for this ridiculousness, which takes advantage of autovivification and existence of hash keys:

...
grep !(exists $record{$_} || undef $record{$_}), @record;

That, however, might lead to some confusion.

And if you care about neither order or duplicate count, you could for another hack using hash slices and the trick I just mentioned:

...
undef @record{@record};
keys %record; # your record, now probably scrambled but at least deduped

I Following this thought to guide the development object-oriented Perl.

Bless associate any data structure reference with a class. Given how Perl creates the inheritance structure (in a kind of tree) it is easy to take advantage of the object model to create Objects for composition.

For this association we called object, to develop always have in mind that the internal state of the object and class behaviours are separated. And you can bless/allow any data reference to use any package/class behaviours. Since the package can understand "the emotional" state of the object.

based on your input example, this awk line works. (without trailing comma)

awk -vRS="" -vOFS=',' '$1=$1' file

test:

kent$  echo "foo
bar
qux
zuu
sdf
sdfasdf"|awk -vRS="" -vOFS=',' '$1=$1' 
foo,bar,qux,zuu,sdf,sdfasdf

The difference between 'exec' and 'system' is that exec replaces your current program with 'command' and NEVER returns to your program. system, on the other hand, forks and runs 'command' and returns you the exit status of 'command' when it is done running. The back tick runs 'command' and then returns a string representing its standard out (whatever it would have printed to the screen)

You can also use popen to run shell commands and I think that there is a shell module - 'use shell' that gives you transparent access to typical shell commands.

Hope that clarifies it for you.

The way you're writing your print statement is unnecessarily verbose. There's no need to separate the newline into its own string. This is sufficient.

print "hello.\n";

This realization will probably make your coding easier in general.

In addition to using use feature "say" or use 5.10.0 or use Modern::Perl to get the built in say feature, I'm going to pimp perl5i which turns on a lot of sensible missing Perl 5 features by default.

You seem to be using grep() like the Unix grep utility, which is wrong.

Perl's grep() in scalar context evaluates the expression for each element of a list and returns the number of times the expression was true. So when $match contains any "true" value, grep($match, @array) in scalar context will always return the number of elements in @array.

Instead, try using the pattern matching operator:

if (grep /$match/, @array) {
    print "found it\n";
}

The PerlMonks and PerlDoc links from cartman and Olafur are a great reference - below is my crack at a summary:

my variables are lexically scoped within a single block defined by {} or within the same file if not in {}s. They are not accessible from packages/subroutines defined outside of the same lexical scope / block.

our variables are scoped within a package/file and accessible from any code that use or require that package/file - name conflicts are resolved between packages by prepending the appropriate namespace.

Just to round it out, local variables are "dynamically" scoped, differing from my variables in that they are also accessible from subroutines called within the same block.

@people = qw( bob john linda ); 
$n = @people; # the number 3
Print " le number in the list is $n \n"; 

Expressions in Perl always return the appropriate value for their context. For example, how about the “name” * of an array. In a list context, it gives the list of elements. But in a scalar context, it returns the number of elements in the array:

Beautiful explanation given by bobf for Boolean values : True or False? A Quick Reference Guide

Truth tests for different values

                       Result of the expression when $var is:

Expression          | 1      | '0.0'  | a string | 0     | empty str | undef
--------------------+--------+--------+----------+-------+-----------+-------
if( $var )          | true   | true   | true     | false | false     | false
if( defined $var )  | true   | true   | true     | true  | true      | false
if( $var eq '' )    | false  | false  | false    | false | true      | true
if( $var == 0 )     | false  | true   | true     | true  | true      | true

The answer can be found in the Perl FAQ list.

You should skim the excellent documentation that comes with Perl

perldoc perltoc

For case-insensitive string search, use index (or rindex) in combination with fc. This example expands on the answer by Eugene Yarmash:

use feature qw( fc ); 
my $str = "Abc"; 
my $substr = "aB"; 

print "found" if index( fc $str, fc $substr ) != -1;
# Prints: found

print "found" if rindex( fc $str, fc $substr ) != -1;
# Prints: found

$str = "Abc";
$substr = "bA";

print "found" if index( fc $str, fc $substr ) != -1;
# Prints nothing

print "found" if rindex( fc $str, fc $substr ) != -1;
# Prints nothing

Both index and rindex return -1 if the substring is not found.
And fc returns a casefolded version of its string argument, and should be used here instead of the (more familiar) uc or lc. Remember to enable this function, for example with use feature qw( fc );.

This worked for me using sed [Edit: comment below points out sed doesn't support \s]

[^ ]

while

[^\s] 

didn't

# Delete everything except space and 'g'
echo "ghai ghai" | sed "s/[^\sg]//g"
gg

echo "ghai ghai" | sed "s/[^ g]//g"
g g

Try this:

use POSIX qw/strftime/;
print strftime('%Y-%m-%d',localtime);

the strftime method does the job effectively for me. Very simple and efficient.

Every canvas item is an object that Tkinter keeps track of. If you are clearing the screen by just drawing a black rectangle, then you effectively have created a memory leak -- eventually your program will crash due to the millions of items that have been drawn.

To clear a canvas, use the delete method. Give it the special parameter "all" to delete all items on the canvas (the string "all"" is a special tag that represents all items on the canvas):

canvas.delete("all")

If you want to delete only certain items on the canvas (such as foreground objects, while leaving the background objects on the display) you can assign tags to each item. Then, instead of "all", you could supply the name of a tag.

If you're creating a game, you probably don't need to delete and recreate items. For example, if you have an object that is moving across the screen, you can use the move or coords method to move the item.

You can do

$result = Model::where(...)->count(); 

to count the results.

You can also use

if ($result->isEmpty()){}

to check whether or not the result is empty.

If you want to change the statusBar's color to white, for all of the views contained in a UINavigationController, add this inside AppDelegate:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    UINavigationBar.appearance().barStyle = .blackOpaque
    return true
}

This code:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

does not work for UIViewControllers contained in a UINavigationController, because the compiler looks for the statusBarStyle of the UINavigationController, not for the statusBarStyle of the ViewControllers contained by it.

Hope this helps those who haven't succeeded with the accepted answer!

This will eliminate the error and is type safe:

this.DNATranscriber[character as keyof typeof DNATranscriber]

Bugginess* in the new Drupal 8 capabilities here inspired us to write our own:

<a href="{{ view_node }}">{% if title|length > 32 %}{% set title_array = title|split(' ') %}{% set title_word_count = 0 %}{% for ta in title_array %}{% set word_count = ta|length %}{% if title_word_count < 32 %}{% set title_word_count = title_word_count + word_count %}{{ ta }} {% endif %}{% endfor %}...{% else %}{{ title }}{% endif %}</a>

This takes into consideration both words and characters (*the "word boundary" setting in D8 was displaying nothing).

I am not proficient at batch scripting but I can tell you that REM stands for Remark. The append won't occur as it is essentially commented out.

http://technet.microsoft.com/en-us/library/bb490986.aspx

Also, the append operator redirects the output of a command to a file. In the snippet you posted it is not clear what output should be redirected.

If by "cursor speed", you mean the repeat rate when holding down a key - then have a look here: http://hints.macworld.com/article.php?story=20090823193018149

To summarize, open up a Terminal window and type the following command:

defaults write NSGlobalDomain KeyRepeat -int 0

More detail from the article:

Everybody knows that you can get a pretty fast keyboard repeat rate by changing a slider on the Keyboard tab of the Keyboard & Mouse System Preferences panel. But you can make it even faster! In Terminal, run this command:

defaults write NSGlobalDomain KeyRepeat -int 0

Then log out and log in again. The fastest setting obtainable via System Preferences is 2 (lower numbers are faster), so you may also want to try a value of 1 if 0 seems too fast. You can always visit the Keyboard & Mouse System Preferences panel to undo your changes.

You may find that a few applications don't handle extremely fast keyboard input very well, but most will do just fine with it.

It looks like you're using python 3.x. In python3, filter, map, zip, etc return an object which is iterable, but not a list. In other words,

filter(func,data) #python 2.x

is equivalent to:

list(filter(func,data)) #python 3.x

I think it was changed because you (often) want to do the filtering in a lazy sense -- You don't need to consume all of the memory to create a list up front, as long as the iterator returns the same thing a list would during iteration.

If you're familiar with list comprehensions and generator expressions, the above filter is now (almost) equivalent to the following in python3.x:

( x for x in data if func(x) ) 

As opposed to:

[ x for x in data if func(x) ]

in python 2.x

for me it only worked with !important in css

.datepicker {z-index: 1151 !important;}

You can remove it with command sudo docker rm YOUR_CONTAINER_ID, then run a new container with sudo docker run ...; or restart an existing container with sudo docker start YOUR_CONTAINER_ID

Iterators make your code more generic.
Every standard library container provides an iterator hence if you change your container class in future the loop wont be affected.

To supplement the above answers into something a little more re-usable, I've come up with this, which continues to prompt the user if the input is considered invalid.

try:
    input = raw_input
except NameError:
    pass

def prompt(message, errormessage, isvalid):
    """Prompt for input given a message and return that value after verifying the input.

    Keyword arguments:
    message -- the message to display when asking the user for the value
    errormessage -- the message to display when the value fails validation
    isvalid -- a function that returns True if the value given by the user is valid
    """
    res = None
    while res is None:
        res = input(str(message)+': ')
        if not isvalid(res):
            print str(errormessage)
            res = None
    return res

It can be used like this, with validation functions:

import re
import os.path

api_key = prompt(
        message = "Enter the API key to use for uploading", 
        errormessage= "A valid API key must be provided. This key can be found in your user profile",
        isvalid = lambda v : re.search(r"(([^-])+-){4}[^-]+", v))

filename = prompt(
        message = "Enter the path of the file to upload", 
        errormessage= "The file path you provided does not exist",
        isvalid = lambda v : os.path.isfile(v))

dataset_name = prompt(
        message = "Enter the name of the dataset you want to create", 
        errormessage= "The dataset must be named",
        isvalid = lambda v : len(v) > 0)

Try putting the search condition in a bracket, as shown below. This returns the result of the conditional query inside the bracket. Then test its result to determine if it is negative (i.e. it does not belong to any of the options in the vector), by setting it to FALSE.

SE_CSVLinelist_filtered <- filter(SE_CSVLinelist_clean, 
(where_case_travelled_1 %in% c('Outside Canada','Outside province/territory of residence but within Canada')) == FALSE)

For those who are absolutely sure their relative path is correct, my problem was that my files did not have the .rb extension! (Even though I used RubyMine to create the files and selected that they were Ruby files on creation.)

Double check the file extensions on your file!

you should set document title in the life cycle of 'componentWillMount':

componentWillMount() {
    document.title = 'your title name'
  },

Don't know why, but only thing that worked for me was using asset_path instead of image_path, even though my images are under the assets/images/ directory:

Example:

app/assets/images/mypic.png

In Ruby:

asset_path('mypic.png')

In .scss:

url(asset-path('mypic.png'))

UPDATE:

Figured it out- turns out these asset helpers come from the sass-rails gem (which I had installed in my project).

To clarify, a database created under SQL Server 2008 R2 was being opened in an instance of SQL Server 2008 (the version prior to R2). The solution for me was to simply perform an upgrade installation of SQL Server 2008 R2. I can only speak for the Express edition, but it worked.

Oddly, though, the Web Platform Installer indicated that I had Express R2 installed. The better way to tell is to ask the database server itself:

SELECT @@VERSION

Starting from @rebisco answer :

function count_appearance(mainStr, searchFor) {
    return (mainStr.split(searchFor).length - 1);
}
function isNumberKey(evt)
{
    $return = true;
    var charCode = (evt.which) ? evt.which : event.keyCode;
    if (charCode != 46 && charCode > 31
            && (charCode < 48 || charCode > 57))
        $return = false;
    $val = $(evt.originalTarget).val();
    if (charCode == 46) {
        if (count_appearance($val, '.') > 0) {
            $return = false;
        }
        if ($val.length == 0) {
            $return = false;
        }
    }
    return $return;
}

Allows only this format : 123123123[.121213]

Demo here demo

This is a special case, but if you're starting with a predefined hash that you want to grab and make a copy of, you can create a method that returns a hash:

def johns 
    {  "John"=>"Adams","Thomas"=>"Jefferson","Johny"=>"Appleseed"}
end

h1 = johns

The particular scenario that I had was I had a collection of JSON-schema hashes where some hashes built off others. I was initially defining them as class variables and ran into this copy issue.

loadXMLDoc JS function should return false, otherwise it will result in postback.

To create your custom log file, try this code

Mage::log('your debug message', null, 'yourlog_filename.log');

Refer this Answer

The difference between a data flow diagram (DFD) and a flow chart (FC) are that a data flow diagram typically describes the data flow within a system and the flow chart usually describes the detailed logic of a business process.

1. Startup.cs add this service services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
2. Your view add inject @inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
3. get your value

Code

@inject Microsoft.AspNetCore.Http.IHttpContextAccessor HttpContextAccessor
@{
    var id = HttpContextAccessor.HttpContext.Request.RouteValues["id"];

    if (id != null)
    {
        // parameter exist in your URL 
    }

    string navigation = await Navigation.WebNavigation(activeTab);
}

in ScrollView use

keyboardShouldPersistTaps="handled" 

This will do your job.

None of these answers were correct in my case.. the order seems dependent on the alphabetical ordering of the <id> tag, which is an arbitrary string. Hence this forced repo search order:

            <repository>
                <id>1_maven.apache.org</id>
                <releases>  <enabled>true</enabled>  </releases>
                <snapshots> <enabled>true</enabled> </snapshots>
                <url>https://repo.maven.apache.org/maven2</url>
                <layout>default</layout>
            </repository>

            <repository>
                <id>2_maven.oracle.com</id>
                <releases>  <enabled>true</enabled>  </releases>
                <snapshots> <enabled>false</enabled> </snapshots>
                <url>https://maven.oracle.com</url>
                <layout>default</layout>
            </repository>

I find that if I try things that others say do not work, it's how I learn the most.

<p>&nbsp;</p>
<p>README.txt</p>
<p>&nbsp;</p>
<div id="list">
  <p><iframe src="README.txt" frameborder="0" height="400"
      width="95%"></iframe></p>
</div>

This worked for me. I used the yellow background-color that I set in the stylesheet.

#list  p {
    font: arial;
    font-size: 14px;
    background-color: yellow ;
}

If none of the above solves your problem and have installed with php-x86 (Windows 32 bit), then problem may be of openssl - for more info : How to fix libeay32.dll was not found error

FYI

Here is another PoC implementation:

• without any libraries (e.g. lodash) for debouncing
• using React Hooks API

I hope it helps :)

import React, { useState, useEffect, ChangeEvent } from 'react';

export default function DebouncedSearchBox({
  inputType,
  handleSearch,
  placeholder,
  debounceInterval,
}: {
  inputType?: string;
  handleSearch: (q: string) => void;
  placeholder: string;
  debounceInterval: number;
}) {
  const [query, setQuery] = useState<string>('');
  const [timer, setTimer] = useState<NodeJS.Timer | undefined>();

  useEffect(() => {
    if (timer) {
      clearTimeout(timer);
    }
    setTimer(setTimeout(() => {
      handleSearch(query);
    }, debounceInterval));
  }, [query]);

  const handleOnChange = (e: ChangeEvent<HTMLInputElement>): void => {
    setQuery(e.target.value);
  };

  return (
    <input
      type={inputType || 'text'}
      className="form-control"
      placeholder={placeholder}
      value={query}
      onChange={handleOnChange}
    />
  );
}

If you DELETE the branch after merging it, just be aware that all hyperlinks, URLs, and references of your DELETED branch will be BROKEN.

You can instruct the child process to print its environment variables (by calling "env"), then loop over the printed environment variables in the parent process and call "export" on those variables.

The following code is based on Capturing output of find . -print0 into a bash array

If the parent shell is the bash, you can use

while IFS= read -r -d $'\0' line; do
    export "$line"
done < <(bash -s <<< 'export VARNAME=something; env -0')
echo $VARNAME

If the parent shell is the dash, then read does not provide the -d flag and the code gets more complicated

TMPDIR=$(mktemp -d)
mkfifo $TMPDIR/fifo
(bash -s << "EOF"
    export VARNAME=something
    while IFS= read -r -d $'\0' line; do
        echo $(printf '%q' "$line")
    done < <(env -0)
EOF
) > $TMPDIR/fifo &
while read -r line; do export "$(eval echo $line)"; done < $TMPDIR/fifo
rm -r $TMPDIR
echo $VARNAME

Removing package-lock.json should be the last resort, at least for projects that have reached production status. After having the same error as described in this question, I found that my package-lock.json was corrupt, even though it was generated. One of the packages had itself as an empty dependency, in this example jsdoc:

        "jsdoc": {
        "version": "x.y.z",
        . . . . . . 
        "dependencies": {
            . . . . . ,
            "jsdoc": {},
            "taffydb": {
             . . . . . 

Please note I have omitted irrelevant parts of the code in this example.

I just removed the empty dependency "jsdoc": {}, and it was OK again.

Instead of LIKE (which does work as other commenters have suggested), you can alternatively use CHARINDEX:

declare @full varchar(100) = 'abcdefg'
declare @find varchar(100) = 'cde'
if (charindex(@find, @full) > 0)
    print 'exists'

function funcion(y) {
$.ajax({
   type: 'POST',
   url: '/ruta',
   data: {"x": y},
   contentType: "application/x-www-form-urlencoded;charset=utf8",
});
}

Yes, it is mainly to anchor your keywords, in particular the location of your page, so whenever URL loads the page with particular anchor name, then it will be pointed to that particular location.

For example, www.something.com/some_page/#computer if it is very lengthy page and you want to show exactly computer then you can anchor.

<p> adfadsf </p>
<p> adfadsf </p>
<p> adfadsf </p>
<a name="computer"></a><p> Computer topics </p>
<p> adfadsf </p>

Now the page will scroll and bring computer-related topics to the top.

Below worked for me,

-name: Upload html app directory to Deployment host
 copy: src=/var/lib/jenkins/workspace/Demoapp/html dest=/var/www/ directory_mode=yes

Don't forget that you can always cut and paste into the minibuffer.

So you can just copy a newline character (or any string) from your buffer, then yank it when prompted for the replacement text.

In this state:

The thread is reading and processing rows for a SELECT statement, and sending data to the client.

Because operations occurring during this this state tend to perform large amounts of disk access (reads).

That's why it takes more time to complete and so is the longest-running state over the lifetime of a given query.

Seems like the problem is with the date format.

 var d = "17-09-2013 10:08",
 dArr = d.split('-'),
 ts = new Date(dArr[1] + "-" + dArr[0] + "-" + dArr[2]).getTime(); // 1379392680000

ISNUMERIC will not do - it tells you that the string can be converted to any of the numeric types, which is almost always a pointless piece of information to know. For example, all of the following are numeric, according to ISNUMERIC:

£, $, 0d0

If you want to check for digits and only digits, a negative LIKE expression is what you want:

not Value like '%[^0-9]%'

There is many way to watch multiple values :

//angular 1.1.4
$scope.$watchCollection(['foo', 'bar'], function(newValues, oldValues){
    // do what you want here
});

or more recent version

//angular 1.3
$scope.$watchGroup(['foo', 'bar'], function(newValues, oldValues, scope) {
  //do what you want here
});

Read official doc for more informations : https://docs.angularjs.org/api/ng/type/$rootScope.Scope

Modern browsers do not currently implement JSONRequest (as far as I know) since it is only a draft right now. I have found someone who has implemented it as a library that you can include in your page: http://devpro.it/JSON/files/JSONRequest-js.html (please note that it has a few dependencies).

Otherwise, you might want to go with another JS library like jQuery or Mootools.

Visual Assist: link.

Install, load solution, press Shift+Alt+O, search for files in solution by substring. Try also Shift+Alt+S, for the equivalent for symbols. This addin has a bunch of completion popup and syntax colouring stuff in it that aren't to all tastes, but the code browsing features are done well and seem uncontroversial.

Judging by comments on the forums, compatibility with Resharper is something they pay attention to.

For free, try also Nifty Solution: link.

I haven't used this myself, but I use the author's Nifty Perforce plugin, and that is pretty tidy.

I found a straight forward way of solving this, with the use of JSON.parse.

Let's assume the json below is inside the variable jsontext.

[
  ["Blankaholm", "Gamleby"],
  ["2012-10-23", "2012-10-22"],
  ["Blankaholm. Under natten har det varit inbrott", "E22 i med Gamleby. Singelolycka. En bilist har.],
  ["57.586174","16.521841"], ["57.893162","16.406090"]
]

The solution is this:

var parsedData = JSON.parse(jsontext);

Now I can access the elements the following way:

var cities = parsedData[0];

My answer seems like less code and it works for me:

    class Nose {
      constructor() {
        this.booger = 'ready'; 
      }
      
      pick() {
        console.log('pick your nose')
      } 
    }
    
    class Ear {
      constructor() {
        this.wax = 'ready'; 
      }
      
      dig() {
        console.log('dig in your ear')
      } 
    }
    
    class Gross extends Classes([Nose,Ear]) {
      constructor() {
        super();
        this.gross = true;
      }
    }
    
    function Classes(bases) {
      class Bases {
        constructor() {
          bases.forEach(base => Object.assign(this, new base()));
        }
      }
      bases.forEach(base => {
        Object.getOwnPropertyNames(base.prototype)
        .filter(prop => prop != 'constructor')
        .forEach(prop => Bases.prototype[prop] = base.prototype[prop])
      })
      return Bases;
    }

    
    // test it
    
    var grossMan = new Gross();
    grossMan.pick(); // eww
    grossMan.dig();  // yuck!

I have fix for this issue,

example if you are assigning some values to DataFrame

[*] symbol has shown this because of the script running

to see the outout of the script have to mention df like this, output

Just ask yourself: "is it an exceptional case that the object is not found"? If it is expected to happen in the normal course of your program, you probably should not raise an exception (since it is not exceptional behavior).

Short version: use exceptions to handle exceptional behavior, not to handle normal flow of control in your program.

-Alan.

It fires in this order.

1. = (exactly)

   location = /path

2. ^~ (forward match)

   location ^~ /path

3. ~ (regular expression case sensitive)

   location ~ /path/

4. ~* (regular expression case insensitive)

   location ~* .(jpg|png|bmp)

5. /

   location /path

I just posted an answer to a question that was subequently closed as a duplicate of this one (for good reasons I think), but I'm surprised to see that my proposed solution is not included in any of the answers here.

Rather than using a defaultdict or messing around with membership tests or manual exception handling, you can easily append values onto lists within a dictionary using the setdefault method:

results = {}                              # use a normal dictionary for our output
for k, v in some_data:                    # the keys may be duplicates
    results.setdefault(k, []).append(v)   # magic happens here!

This is a lot like using a defaultdict, but you don't need a special data type. When you call setdefault, it checks to see if the first argument (the key) is already in the dictionary. If doesn't find anything, it assigns the second argument (the default value, an empty list in this case) as a new value for the key. If the key does exist, nothing special is done (the default goes unused). In either case though, the value (whether old or new) gets returned, so we can unconditionally call append on it, knowing it should always be a list.

First of all you need to download the file from here https://gradle.org/releases

unzip the file and copy folder something like this gradle-3.3(if version is 3.3) and past it to C:\Android\Android Studio\gradle

Now open the Android Studio and from the left top corner Open File > Settings > Build,Execution,Deployment > Gradle

Now give the the path of folder gradle-3.3 in Gradle Home

I know this is old, but it still comes up when you search for the comparison. We were using Mongo, have moved almost entirely to Dynamo, which is our first choice now. Not because it has more features, it doesn't. Mongo has a better query language, you can index within a structure, there's lots of little things. The superiority of Dynamo is in what the OP stated in his comment: it's easy. You don't have to take care of any servers. When you start to set up a Mongo sharded solution, it gets complicated. You can go to one of the hosting companies, but that's not cheap either. With Dynamo, if you need more throughput, you just click a button. You can write scripts to scale automatically. When it's time to upgrade Dynamo, it's done for you. That is all a lot of precious stress and time not spent. If you don't have dedicated ops people, Dynamo is excellent.

So we are now going on Dynamo by default. Mongo maybe, if the data structure is complicated enough to warrant it, but then we'd probably go back to a SQL database. Dynamo is obtuse, you really need to think about how you're going to build it, and likely you'll use Redis in Elasticcache to make it work for complex stuff. But it sure is nice to not have to take care of it. You code. That's it.

I have at least one situation where the data is not automatically cleaned up, which would eventually lead to "Out of Memory" errors. In a UserForm I had:

Public mainPicture As StdPicture
...
mainPicture = LoadPicture(PAGE_FILE)

When UserForm was destroyed (after Unload Me) the memory allocated for the data loaded in the mainPicture was not being de-allocated. I had to add an explicit

mainPicture = Nothing

in the terminate event.

In modern JS you can simply use async/await, like:

  async function upload() {
    return new Promise((resolve, reject) => {
        $.ajax({
            url: $(this).attr('href'),
            type: 'GET',
            timeout: 30000,
            success: (response) => {
                resolve(response);
            },
            error: (response) => {
                reject(response);
            }
        })
    })
}

Then call it in an async function like:

let response = await upload();

Some clear explanations (for SOAP and WSDL) can be found here as well.

Difference between a SOAP message and a WSDL?

Make it

float b= 3.6f;

A floating-point literal is of type float if it is suffixed with an ASCII letter F or f; otherwise its type is double and it can optionally be suffixed with an ASCII letter D or d

• Read More

Just put the html tags with there content and add the xmlns attribute with quotes after the equals and in between the quotes is http://www.w3.org/1999/xhtml

php_value max_input_vars 6000

"Put this line on .htaccess file of your site. "

You're just opening your php file into browser. You have to open it using localhost url. if you open a file directly from your directory it will not execute the php code in any case.

use: http://locahost/index.php or http:127.0.0.1/index.php

Enable php short code. In your case, you are using <? which is php short code for <?php. By default php short codes are disabled.

Also use: sudo apt-get install php5 libapache2-mod-php5 php5-mcrypt if you are a ubuntu user.

This is a example for get the url image, escape the p tag from some item.

Try this:

$('#img').attr('src').split('<p>')[1].split('</p>')[0]

If you're only interested in bailing if a particular argument is missing, Parameter Substitution is great:

#!/bin/bash
# usage-message.sh

: ${1?"Usage: $0 ARGUMENT"}
#  Script exits here if command-line parameter absent,
#+ with following error message.
#    usage-message.sh: 1: Usage: usage-message.sh ARGUMENT

list.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

You need a SQL profiler, which actually runs outside SQL Management Studio. If you have a paid version of SQL Server (like the developer edition), it should be included in that as another utility.

If you're using a free edition (SQL Express), they have freeware profiles that you can download. I've used AnjLab's profiler (available at http://sites.google.com/site/sqlprofiler), and it seemed to work well.

Use translate:

import string

def clean(instr):
    return instr.translate(None, string.punctuation + ' ')

Caveat: Only works on ascii strings.

Yes, you can do this in one line (though for robust IOException handling you wouldn't want to).

String content = new Scanner(new File("filename")).useDelimiter("\\Z").next();
System.out.println(content);

This uses a java.util.Scanner, telling it to delimit the input with \Z, which is the end of the string anchor. This ultimately makes the input have one actual token, which is the entire file, so it can be read with one call to next().

There is a constructor that takes a File and a String charSetName (among many other overloads). These two constructor may throw FileNotFoundException, but like all Scanner methods, no IOException can be thrown beyond these constructors.

You can query the Scanner itself through the ioException() method if an IOException occurred or not. You may also want to explicitly close() the Scanner after you read the content, so perhaps storing the Scanner reference in a local variable is best.

See also

• Java Tutorials - I/O Essentials - Scanning and formatting

Related questions

• Validating input using java.util.Scanner - has many examples of more typical usage

Third-party library options

For completeness, these are some really good options if you have these very reputable and highly useful third party libraries:

Guava

com.google.common.io.Files contains many useful methods. The pertinent ones here are:

• String toString(File, Charset)
  • Using the given character set, reads all characters from a file into a String
• List<String> readLines(File, Charset)
  • ... reads all of the lines from a file into a List<String>, one entry per line

Apache Commons/IO

org.apache.commons.io.IOUtils also offer similar functionality:

• String toString(InputStream, String encoding)
  • Using the specified character encoding, gets the contents of an InputStream as a String
• List readLines(InputStream, String encoding)
  • ... as a (raw) List of String, one entry per line

Related questions

• Most useful free third party Java libraries (deleted)?

Worked for me after installing scipy.

A border will always be at the full length of the containing box (the height of the element plus its padding), it can't be controlled except for adjusting the height of the element to which it applies. If all you need is a vertical divider, you could use:

<div id="left">
  content
</div>
<span class="divider"></span>
<div id="right">
  content
</div>

With css:

span {
 display: inline-block;
 width: 0;
 height: 1em;
 border-left: 1px solid #ccc;
 border-right: 1px solid #ccc;
}

Demo at JS Fiddle, adjust the height of the span.container to adjust the border 'height'.

Or, to use pseudo-elements (::before or ::after), given the following HTML:

<div id="left">content</div>
<div id="right">content</div>

The following CSS adds a pseudo-element before any div element that's the adjacent sibling of another div element:

div {
    display: inline-block;
    position: relative;
}

div + div {
    padding-left: 0.3em;
}

div + div::before {
    content: '';
    border-left: 2px solid #000;
    position: absolute;
    height: 50%;
    left: 0;
    top: 25%;
}

JS Fiddle demo.

A better alternative is provided in ES6 using Sets. So, instead of declaring Arrays, it is recommended to use Sets if you need to have an array that shouldn't add duplicates.

var array = new Set();
array.add(1);
array.add(2);
array.add(3);

console.log(array);
// Prints: Set(3) {1, 2, 3}

array.add(2); // does not add any new element

console.log(array);
// Still Prints: Set(3) {1, 2, 3}

use NestedScrollView with viewport true is working good for me

<android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="700dp">

        </android.support.constraint.ConstraintLayout>

</android.support.v4.widget.NestedScrollView>

I had a problem with the same symtoms. In my case, it turned out that my submit function was missing the "return" statement.

For example:

 $("#id_form").on("submit", function(){
   //Code: Action (like ajax...)
   return false;
 })

You could use the HttpContext.Response and directly write the content to it (WriteFile() might work for you) and then return ContentResult from your action instead of ActionResult.

Disclaimer: I have not tried this, it's based on looking at the available APIs. :-)

To send CDATA in a request object use the SoapObject.setInnerText("..."); method.

I think you are looking for the Dictionary object, found in the Microsoft Scripting Runtime library. (Add a reference to your project from the Tools...References menu in the VBE.)

It pretty much works with any simple value that can fit in a variant (Keys can't be arrays, and trying to make them objects doesn't make much sense. See comment from @Nile below.):

Dim d As dictionary
Set d = New dictionary

d("x") = 42
d(42) = "forty-two"
d(CVErr(xlErrValue)) = "Excel #VALUE!"
Set d(101) = New Collection

You can also use the VBA Collection object if your needs are simpler and you just want string keys.

I don't know if either actually hashes on anything, so you might want to dig further if you need hashtable-like performance. (EDIT: Scripting.Dictionary does use a hash table internally.)

This simple example works for me...

HTML

<input type="text" id="datepicker">

JavaScript

var $datepicker = $('#datepicker');
$datepicker.datepicker();
$datepicker.datepicker('setDate', new Date());

I was able to create this by simply looking @ the manual and reading the explanation of setDate:

.datepicker( "setDate" , date )
Sets the current date for the datepicker. The new date may be a Date object or a string in the current date format (e.g. '01/26/2009'), a number of days from today (e.g. +7) or a string of values and periods ('y' for years, 'm' for months, 'w' for weeks, 'd' for days, e.g. '+1m +7d'), or null to clear the selected date.

The solutions given here actually do not take into account multi-byte Unicode characters ("composed characters"), and could result in invalid Unicode strings.

In fact, the iOS header file which contains the declaration of substringToIndex contains the following comment:

Hint: Use with rangeOfComposedCharacterSequencesForRange: to avoid breaking up composed characters

See how to use rangeOfComposedCharacterSequenceAtIndex: to delete the last character correctly.

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
char *substring(int i,int j,char *ch)
{
    int n,k=0;
    char *ch1;
    ch1=(char*)malloc((j-i+1)*1);
    n=j-i+1;

    while(k<n)
    {
        ch1[k]=ch[i];
        i++;k++;
    }

    return (char *)ch1;
}

int main()
{
    int i=0,j=2;
    char s[]="String";
    char *test;

    test=substring(i,j,s);
    printf("%s",test);
    free(test); //free the test 
    return 0;
}

This will compile fine without any warning

1. #include stdlib.h
2. pass test=substring(i,j,s);
3. remove m as it is unused
4. either declare char substring(int i,int j,char *ch) or define it before main

You want to save Bitmap to Directory of your Choice. I have made a library ImageWorker that enables the user to load, save and convert bitmaps/drawables/base64 images.

Min SDK - 14

Pre-requisite

• Saving files would require WRITE_EXTERNAL_STORAGE permission.
• Retrieving files would require READ_EXTERNAL_STORAGE permission.

Saving Bitmap/Drawable/Base64

ImageWorker.to(context).
    directory("ImageWorker").
    subDirectory("SubDirectory").
    setFileName("Image").
    withExtension(Extension.PNG).
    save(sourceBitmap,85)

Loading Bitmap

val bitmap: Bitmap? = ImageWorker.from(context).
    directory("ImageWorker").
    subDirectory("SubDirectory").
    setFileName("Image").
    withExtension(Extension.PNG).
    load()

Implementation

Add Dependencies

In Project Level Gradle

allprojects {
        repositories {
            ...
            maven { url 'https://jitpack.io' }
        }
    }

In Application Level Gradle

dependencies {
            implementation 'com.github.ihimanshurawat:ImageWorker:0.51'
    }

You can read more on https://github.com/ihimanshurawat/ImageWorker/blob/master/README.md

You're thinking it wrong.

What you are trying to do:

If stdin exists use it, else check whether the user supplied a filename.

What you should be doing instead:

If the user supplies a filename, then use the filename. Else use stdin.

You cannot know the total length of an incoming stream unless you read it all and keep it buffered. You just cannot seek backwards into pipes. This is a limitation of how pipes work. Pipes are not suitable for all tasks and sometimes intermediate files are required.

For mac :

I have added below two commands its working fine!

-vm
/usr/bin
/usr/libexec/java_home --verbose

Example

As of Android 7.0, you can read the list from the Language settings straight in the source. You can see the Android version in the URL:

• https://android.googlesource.com/platform/frameworks/base/+/android-9.0.0_r1/core/res/res/values/locale_config.xml
• https://android.googlesource.com/platform/frameworks/base/+/android-8.1.0_r1/core/res/res/values/locale_config.xml
• https://android.googlesource.com/platform/frameworks/base/+/android-8.0.0_r1/core/res/res/values/locale_config.xml
• https://android.googlesource.com/platform/frameworks/base/+/android-7.1.2_r1/core/res/res/values/locale_config.xml
• https://android.googlesource.com/platform/frameworks/base/+/android-7.0.0_r1/core/res/res/values/locale_config.xml

The list for Google Play descriptions is different:

• https://support.google.com/googleplay/android-developer/table/4419860

jQuery.trim() capital Q?

or $.trim()

here is the complete working code in c# :

It has been implemented with Single Queue,

push:

1. add new element.
2. Remove elements from Queue (totalsize-1) times and add back to the Queue

pop:

normal remove





 using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    namespace StackImplimentationUsingQueue
    {
        class Program
        {
            public class Node
            {
                public int data;
                public Node link;
            }
            public class Queue
            {
                public Node rear;
                public Node front;
                public int size = 0;
                public void EnQueue(int data)
                {
                    Node n = new Node();
                    n.data = data;
                    n.link = null;
                    if (rear == null)
                        front = rear = n;
                    else
                    {
                        rear.link = n;
                        rear = n;
                    }
                    size++;
                    Display();
                }
                public Node DeQueue()
                {
                    Node temp = new Node();
                    if (front == null)
                        Console.WriteLine("Empty");
                    else
                    {
                        temp = front;
                        front = front.link;
                        size--;
                    }
                    Display();
                    return temp;
                }
                public void Display()
                {
                    if (size == 0)
                        Console.WriteLine("Empty");
                    else
                    {
                        Console.Clear();
                        Node n = front;
                        while (n != null)
                        {
                            Console.WriteLine(n.data);
                            n = n.link;
                        }
                    }
                }
            }
            public class Stack
            {
                public Queue q;
                public int size = 0;
                public Node top;
                public Stack()
                {
                    q = new Queue();
                }
                public void Push(int data)
                {
                    Node n = new Node();
                    n.data = data;
                    q.EnQueue(data);
                    size++;
                    int counter = size;
                    while (counter > 1)
                    {
                        q.EnQueue(q.DeQueue().data);
                        counter--;
                    }
                }
                public void Pop()
                {
                    q.DeQueue();
                    size--;
                }
            }
            static void Main(string[] args)
            {
                Stack s= new Stack();
                for (int i = 1; i <= 3; i++)
                    s.Push(i);
                for (int i = 1; i < 3; i++)
                    s.Pop();
                Console.ReadKey();
            }
        }
    }

***Try this***

 buildTypes {
        release {
            lintOptions {
                disable 'MissingTranslation'
                checkReleaseBuilds false
                abortOnError false
            }
            minifyEnabled false
            signingConfig signingConfigs.release
        }
    }

I also encountered this issue.

My problem was that I renamed the folder my extension was in, so all I had to do was delete and reload the extension.

Thought this might help some people out there.

// in the HTML code I used some razor
@Html.Hidden("RedirectTo", Url.Action("Action", "Controller"));

// now down in the script I do this
<script type="text/javascript">

var url = $("#RedirectTo").val();

$(document).ready(function () {
    $.ajax({
        dataType: 'json',
        type: 'POST',
        url: '/Controller/Action',
        success: function (result) {
            if (result.UserFriendlyErrMsg === 'Some Message') {
                // display a prompt
                alert("Message: " + result.UserFriendlyErrMsg);
                // redirect us to the new page
                location.href = url;
            }
            $('#friendlyMsg').html(result.UserFriendlyErrMsg);
        }
    });
</script>

How I can get rid of it so it doesnt display it?

People here are trying to tell you that it's unprofessional (and it is), but in your case you should simply add following to the start of your application:

 error_reporting(E_ERROR|E_WARNING);

This will disable E_NOTICE reporting. E_NOTICES are not errors, but notices, as the name says. You'd better check this stuff out and proof that undefined variables don't lead to errors. But the common case is that they are just informal, and perfectly normal for handling form input with PHP.

Also, next time Google the error message first.

If your textfile manipulation usually is one-time, possibly done on the shell-prompt, you will not get anything better from python.

On the other hand, if you usually have to do the same (or similar) task over and over, and you have to write your scripts for doing that, then python is great - and you can easily create your own libraries (you can do that with shell scripts too, but it's more cumbersome).

A very simple example to get a feeling.

import popen2
stdout_text, stdin_text=popen2.popen2("your-shell-command-here")
for line in stdout_text:
  if line.startswith("#"):
    pass
  else
    jobID=int(line.split(",")[0].split()[1].lstrip("<").rstrip(">"))
    # do something with jobID

Check also sys and getopt module, they are the first you will need.

JSON.stringify()

let myVar = {a: {b: {c: 1}}};
console.log(JSON.stringify( myVar, null, 4 ))

Great for deep inspection of data objects. This approach works on nested arrays and nested objects with arrays.

Your query apparently returned all correct dates, even considering the time.

If you're still not happy with the results, give DATEDIFF a shot and look for negaive/positive results between the two dates.

Make sure your mydate column is a datetime type.

IMHO, hg strip -r 39 suits this case better.

It requires the mq extension to be enabled and has the same limitations as the "cloning repo method" recommended by Martin Geisler: If the changeset was somehow published, it will (probably) return to your repo at some point in time because you only changed your local repo.

Try select substr(orderno, 1,2) from shipment;

HISTTIMEFORMAT="%d/%m/%y %H:%M "

For any commands typed prior to this, it will not help since they will just get a default time of when you turned history on, but it will log the time of any further commands after this.

If you want it to log history for permanent, you should put the following line in your ~/.bashrc

export HISTTIMEFORMAT="%d/%m/%y %H:%M "

Write a script and make it executable. The script should look like what you'd normally use at the command line:

java YourClass

This assumes you've already compiled your .java files and that the java can find your .class files. If java cannot find your .class files, you may want to look at using the -classpath option or setting your CLASSPATH environment variable.

Java 9

Use the Java 8 solution. Note DatatypeConverter can still be used, but it is now within the java.xml.bind module which will need to be included.

module org.example.foo {
    requires java.xml.bind;
}

Java 8

Java 8 now provides java.util.Base64 for encoding and decoding base64.

Encoding

byte[] message = "hello world".getBytes(StandardCharsets.UTF_8);
String encoded = Base64.getEncoder().encodeToString(message);
System.out.println(encoded);
// => aGVsbG8gd29ybGQ=

Decoding

byte[] decoded = Base64.getDecoder().decode("aGVsbG8gd29ybGQ=");
System.out.println(new String(decoded, StandardCharsets.UTF_8));
// => hello world

Java 6 and 7

Since Java 6 the lesser known class javax.xml.bind.DatatypeConverter can be used. This is part of the JRE, no extra libraries required.

Encoding

byte[] message = "hello world".getBytes("UTF-8");
String encoded = DatatypeConverter.printBase64Binary(message);
System.out.println(encoded);
// => aGVsbG8gd29ybGQ=  

Decoding

byte[] decoded = DatatypeConverter.parseBase64Binary("aGVsbG8gd29ybGQ=");
System.out.println(new String(decoded, "UTF-8"));
// => hello world

I have never encountered a C#->Java conversion tool. The syntax would be easy enough, but the frameworks are dramatically different. Even if there were a tool, I would strongly advise against it. I have worked on several "migration" projects, and can't say emphatically enough that while conversion seems like a good choice, conversion projects always always always turn in to money pits. It's not a shortcut, what you end up with is code that is not readable, and doesn't take advantage of the target language. speaking from personal experience, assume that a rewrite is the cheaper option.

This will do what you want. Fixed sides with 50px-width, and the content fills the remaining area.

<div style="width:100%;">
    <div style="width: 50px; float: left;">Left Side</div>
    <div style="width: 50px; float: right;">Right Side</div>
    <div style="margin-left: 50px; margin-right: 50px;">Content Goes Here</div>
</div>

If you are actually looking for the index number (and not the value) of the selected option then it would be

document.forms[0].elements["CCards"].selectedIndex 
/* You may need to change document.forms[0] to reference the correct form */

or using jQuery

$('select[name="CCards"]')[0].selectedIndex 

One thing you can do is to set your axis range by yourself by using matplotlib.pyplot.axis.

matplotlib.pyplot.axis

from matplotlib import pyplot as plt
plt.axis([0, 10, 0, 20])

0,10 is for x axis range. 0,20 is for y axis range.

or you can also use matplotlib.pyplot.xlim or matplotlib.pyplot.ylim

matplotlib.pyplot.ylim

plt.ylim(-2, 2)
plt.xlim(0,10)

In design patterns there is a principle called "favouring composition over inheritance". It says instead of inheriting Class B from Class A ,put an instance of class A inside class B as a property and then you can use functionalities of class A inside class B. You can see some examples of that here and here.

var inputs = document.getElementsByTagName('input');
for (var i = 0; i < inputs.length; ++i) {
  // ...
}

Upgrade the version of node without installing any package, not even nvm itself:

sudo npx n stable

Explanations:
This approach is similar to Johan Dettmar's answer. The only difference is here the package n is not installed glabally in the local machine.

For consistency remove any borders and use the height for the <hr> thickness. Adding a background color will style your <hr> with the height and color specified.

In your stylesheet:

hr {
    border: none;
    height: 1px;
    /* Set the hr color */
    color: #333; /* old IE */
    background-color: #333; /* Modern Browsers */
}

Or inline as you have it:

<hr style="height:1px;border:none;color:#333;background-color:#333;" />

Longer explanation here

That's a bit of informal terminology.

As far as Git is concerned, every other repository is just a remote.

Generally speaking, upstream is where you cloned from (the origin). Downstream is any project that integrates your work with other works.

The terms are not restricted to Git repositories.

For instance, Ubuntu is a Debian derivative, so Debian is upstream for Ubuntu.

Do you mean this:

if (newStr4.startsWith("Mon") || newStr4.startsWith("Tues") || ...)

Or you could use regular expression:

if (newStr4.matches("(Mon|Tues|Wed|Thurs|Fri).*"))

An alternative to using environment variables, which can get messy if you have a lot of them, is to use volumes to make a directory on the host accessible in the container.

If you put all your credentials as files in that folder, then the container can read the files and use them as it pleases.

For example:

$ echo "secret" > /root/configs/password.txt
$ docker run -v /root/configs:/cfg ...

In the Docker container:

# echo Password is `cat /cfg/password.txt`
Password is secret

Many programs can read their credentials from a separate file, so this way you can just point the program to one of the files.

Sometimes you just need to change Solution configuration from 'release' to 'debug'.

For Python/Java,

^(.(?!(some text)))*$

http://www.lisnichenko.com/articles/javapython-inverse-regex.html

Modified version from @dovidev as his version loads the image externally instead of reading the local cache.

1. Navigate to chrome://cache/
2. In the chrome top menu go to "View > Developer > Javascript Console"
3. In the console that opens paste the below and press enter

var cached_anchors = $$('a');_x000D_
document.body.innerHTML = '';_x000D_
for (var i in cached_anchors) {_x000D_
    var ca = cached_anchors[i];_x000D_
    if(ca.href.search('.png') > -1 || ca.href.search('.gif') > -1 || ca.href.search('.jpg') > -1) {_x000D_
        var xhr = new XMLHttpRequest();_x000D_
        xhr.open("GET", ca.href);_x000D_
        xhr.responseType = "document";_x000D_
        xhr.onload = response;_x000D_
        xhr.send();_x000D_
    }_x000D_
}_x000D_
_x000D_
function response(e) {_x000D_
  var hexdata = this.response.getElementsByTagName("pre")[2].innerHTML.split(/\r?\n/).slice(0,-1).map(e => e.split(/[\s:]+\s/)[1]).map(e => e.replace(/\s/g,'')).join('');_x000D_
  var byteArray = new Uint8Array(hexdata.length/2);_x000D_
  for (var x = 0; x < byteArray.length; x++){_x000D_
      byteArray[x] = parseInt(hexdata.substr(x*2,2), 16);_x000D_
  }_x000D_
  var blob = new Blob([byteArray], {type: "application/octet-stream"});_x000D_
  var image = new Image();_x000D_
  image.src = URL.createObjectURL(blob);_x000D_
  document.body.appendChild(image);_x000D_
}

put the dll in system32 or syswow32 directory, and use appropriate regsvr32 to register it. wiered that even though it gave failed to register error, I rebooted my WIN 7 64 AND my vb app loaded the dll just fine!!

I had the same issue. The problem ended up being the path to the image file. Make sure the image path is relative to the location of the CSS file instead of the HTML.

As of macOS Catalina 10.15.6, I run:

brew install git
brew install git-gui

and it worked for me.

A column with default value:

CREATE TABLE <TableName>(
...
<ColumnName> <Type> DEFAULT <DefaultValue>
...
)

<DefaultValue> is a placeholder for a:

• value literal
• ( expression )

Examples:

Count INTEGER DEFAULT 0,
LastSeen TEXT DEFAULT (datetime('now'))

From Sql Server 2008 you have "date" format.

So you can use

SELECT * FROM LOGS WHERE CONVERT(date,[CHECK_IN]) BETWEEN '2013-10-18' AND '2013-10-18'

https://docs.microsoft.com/en-us/sql/t-sql/data-types/date-transact-sql

can you try if.else

> col2=ifelse(df1$col=="true",1,0)
> df1
$col
[1] "true"  "false"

> cbind(df1$col)
     [,1]   
[1,] "true" 
[2,] "false"
> cbind(df1$col,col2)
             col2
[1,] "true"  "1" 
[2,] "false" "0" 

Objective-C is a more perfect superset of C. In C and Objective-C implicit casting from void* to a struct pointer is allowed.

Foo* bar = malloc(sizeof(Foo));

C++ will not compile unless the void pointer is explicitly cast:

Foo* bar = (Foo*)malloc(sizeof(Foo));

The relevance of this to every day programming is zero, just a fun trivia fact.

On some mobiles like mine (MIUI Redmi 3) you can just add specific Application on list where application doesnt stop when you terminate applactions in Task Manager (It will stop but it will start again)

Just go to Settings>PermissionsAutostart

Stumbled upon this one but you can get it by using the following as long as you import numpy.

import numpy as np

[y, x] = np.shape(img[:,:,0])

It works because you ignore all but one color and then the image is just 2D so shape tells you how bid it is. Still kinda new to Python but seems like a simple way to do it.

Here is a checklist I use to rename a component:

1.Rename the component class (VSCode Rename Symbool will update all the references)

<Old Name>Component => <New Name>Component

2.Rename @Component selector along with references (use VSCode's Replace in Files):

app-<old-name> => app-<new-name>

Result:
@Component({
  selector: 'app-<old-name>' => 'app-<new-name>',
  ...
})

<app-{old-name}></app-{old-name}> => <app-{new-name}></app-{new-name}>

3.Rename component folder (when renaming folder in VSCode, it will update references in module and other components)

src\app\<module>\<old-name> => src\app\<module>\<new-name>

4.Rename component files (renaming manually will be the fastest, but you can also use a terminal to rename all at once)

<old-name>.compoonent.* => <new-name>.compoonent.*

Bash:
find . -name "<old-name>.component.*" -exec rename 's/\/<old-name>\.component/\/<new-name>.component/' '{}' +

PowerShell: 
Get-Item <old-name>.component.* | % { Rename-Item $_ <new-name>.component.$($_.Extension) }

Cmd:
rename <old-name>.component.* <new-name>.component.*

5.Replace file references in @Component (use VSCode's Replace in Files):

<old-name>.component => <new-name>.component

Result:
@Component({
  ...
  templateUrl: './<old-name>.component.html' => './<old-name>.component.html',
  styleUrls: ['./<old-name>.component.scss'] => ['./<new-name>.component.scss']
})

That should be sufficient

I met this issue this morning because I used the same executable in DIFFERENT OSes: after compiling my program with gcc -ggdb -Wall test.c -o test in my Mac(10.15.2), I ran gdb with the executable in Ubuntu(16.04) in my VirtualBox.

Fix: recompile with the same command under Ubuntu, then you should be good.

An alternative way can be this: - recommended as using just one expression -

case when address.country <> '' then address.country
else 'United States'
end as country

Note: Result of checking null by <> operator will return false.
And as documented: NULLIF is equivalent to a searched CASE expression
and COALESCE expression is a syntactic shortcut for the CASE expression.
So, combination of those are using two time of case expression.

While working in a big project which has complex build system and where it is hard to get (or modify) the gcc/g++ command directly there is another way to see the result of macro expansion. Simply redefine the macro, and you will get output similiar to following:

file.h: note: this is the location of the previous definition
#define MACRO current_value

(Update) V5.1 & Hooks (Requires React >= 16.8)

You can use useHistory, useLocation and useRouteMatch in your component to get match, history and location .

const Child = () => {
  const location = useLocation();
  const history = useHistory();
  const match = useRouteMatch("write-the-url-you-want-to-match-here");

  return (
    <div>{location.pathname}</div>
  )
}

export default Child

(Update) V4 & V5

You can use withRouter HOC in order to inject match, history and location in your component props.

class Child extends React.Component {
  static propTypes = {
    match: PropTypes.object.isRequired,
    location: PropTypes.object.isRequired,
    history: PropTypes.object.isRequired
  }

  render() {
    const { match, location, history } = this.props

    return (
      <div>{location.pathname}</div>
    )
  }
}

export default withRouter(Child)

(Update) V3

You can use withRouter HOC in order to inject router, params, location, routes in your component props.

class Child extends React.Component {

  render() {
    const { router, params, location, routes } = this.props

    return (
      <div>{location.pathname}</div>
    )
  }
}

export default withRouter(Child)

Original answer

If you don't want to use the props, you can use the context as described in React Router documentation

First, you have to set up your childContextTypes and getChildContext

class App extends React.Component{

  getChildContext() {
    return {
      location: this.props.location
    }
  }

  render() {
    return <Child/>;
  }
}

App.childContextTypes = {
    location: React.PropTypes.object
}

Then, you will be able to access to the location object in your child components using the context like this

class Child extends React.Component{

   render() {
     return (
       <div>{this.context.location.pathname}</div>
     )
   }

}

Child.contextTypes = {
    location: React.PropTypes.object
 }

I had the same need in bash (Ubuntu 16.04 LTS) and the commands provided in the answers failed to work in my case. I had to use:

curl -X POST -F 'username="$USER"' -F 'password="$PASS"' "http://api.somesite.com/test/blah?something=123"

Double quotes in the -F arguments are only needed if you're using variables, thus from the command line ... -F 'username=myuser' ... will be fine.

Relevant Security Notice: as Mr. Mark Ribau points in comments this command shows the password ($PASS variable, expanded) in the processlist!

For Bootstrap 3:

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
_x000D_
_x000D_
<div class="row">_x000D_
    <div class="col-md-4">_x000D_
        <div class="well">1_x000D_
            <br/>_x000D_
            <br/>_x000D_
            <br/>_x000D_
            <br/>_x000D_
            <br/>_x000D_
        </div>_x000D_
    </div>_x000D_
    <div class="col-md-8">_x000D_
        <div class="row">_x000D_
            <div class="col-md-6">_x000D_
                <div class="well">2</div>_x000D_
            </div>_x000D_
            <div class="col-md-6">_x000D_
                <div class="well">3</div>_x000D_
            </div>_x000D_
        </div>_x000D_
        <div class="row">_x000D_
            <div class="col-md-6">_x000D_
                <div class="well">4</div>_x000D_
            </div>_x000D_
            <div class="col-md-6">_x000D_
                <div class="well">5</div>_x000D_
            </div>_x000D_
        </div>_x000D_
    </div>_x000D_
</div>_x000D_
<div class="row">_x000D_
    <div class="col-md-4">_x000D_
        <div class="well">6</div>_x000D_
    </div>_x000D_
    <div class="col-md-4">_x000D_
        <div class="well">7</div>_x000D_
    </div>_x000D_
    <div class="col-md-4">_x000D_
        <div class="well">8</div>_x000D_
    </div>_x000D_
</div>

For Bootstrap 2:

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.3.2/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
_x000D_
<div class="row-fluid">_x000D_
    <div class="span4"><div class="well">1<br/><br/><br/><br/><br/></div></div>_x000D_
    <div class="span8">_x000D_
        <div class="row-fluid">_x000D_
            <div class="span6"><div class="well">2</div></div>_x000D_
            <div class="span6"><div class="well">3</div></div>_x000D_
        </div>_x000D_
        <div class="row-fluid">_x000D_
            <div class="span6"><div class="well">4</div></div>_x000D_
            <div class="span6"><div class="well">5</div></div>_x000D_
        </div>_x000D_
    </div>_x000D_
</div>_x000D_
<div class="row-fluid">_x000D_
    <div class="span4">_x000D_
        <div class="well">6</div>_x000D_
    </div>_x000D_
    <div class="span4">_x000D_
        <div class="well">7</div>_x000D_
    </div>_x000D_
    <div class="span4">_x000D_
        <div class="well">8</div>_x000D_
    </div>_x000D_
</div>

See the demo on JSFiddle (Bootstrap 2): http://jsfiddle.net/SxcqH/52/

If you are in Spring, try just add properties for it (use needed properties), and it should work for total JVM

javax:
  net:
    ssl:
      key-store-password: ${KEYSTORE_SECRET}
      key-store-type: PKCS12
      trust-store-password: ${TRUSTSTORE_SECRET}
      trust-store-type: PKCS12

If you don't want to have to specify the version every time you use pip:

Install pip:

$ curl https://raw.github.com/pypa/pip/master/contrib/get-pip.py | python3

and export the path:

$ export PATH=/Library/Frameworks/Python.framework/Versions/<version number>/bin:$PATH

Sorry for late reply but still felt like posting my answer if it helps.It works for 6 digits OTP.

    @Override
    public void onOTPReceived(String messageBody)
    {
        Pattern pattern = Pattern.compile(SMSReceiver.OTP_REGEX);
        Matcher matcher = pattern.matcher(messageBody);
        String otp = HkpConstants.EMPTY;
        while (matcher.find())
        {
            otp = matcher.group();
        }
        checkAndSetOTP(otp);
    }
Adding constants here

public static final String OTP_REGEX = "[0-9]{1,6}";

For SMS listener one can follow the below class

public class SMSReceiver extends BroadcastReceiver
{
    public static final String SMS_BUNDLE = "pdus";
    public static final String OTP_REGEX = "[0-9]{1,6}";
    private static final String FORMAT = "format";

    private OnOTPSMSReceivedListener otpSMSListener;

    public SMSReceiver(OnOTPSMSReceivedListener listener)
    {
        otpSMSListener = listener;
    }

    @Override
    public void onReceive(Context context, Intent intent)
    {
        Bundle intentExtras = intent.getExtras();
        if (intentExtras != null)
        {
            Object[] sms_bundle = (Object[]) intentExtras.get(SMS_BUNDLE);
            String format = intent.getStringExtra(FORMAT);
            if (sms_bundle != null)
            {
                otpSMSListener.onOTPSMSReceived(format, sms_bundle);
            }
            else {
                // do nothing
            }
        }
    }

    @FunctionalInterface
    public interface OnOTPSMSReceivedListener
    {
        void onOTPSMSReceived(@Nullable String format, Object... smsBundle);
    }
}

    @Override
    public void onOTPSMSReceived(@Nullable String format, Object... smsBundle)
    {
        for (Object aSmsBundle : smsBundle)
        {
            SmsMessage smsMessage = getIncomingMessage(format, aSmsBundle);
            String sender = smsMessage.getDisplayOriginatingAddress();
            if (sender.toLowerCase().contains(ONEMG))
            {
                getIncomingMessage(smsMessage.getMessageBody());
            } else
            {
                // do nothing
            }
        }
    }

    private SmsMessage getIncomingMessage(@Nullable String format, Object aObject)
    {
        SmsMessage currentSMS;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && format != null)
        {
            currentSMS = SmsMessage.createFromPdu((byte[]) aObject, format);
        } else
        {
            currentSMS = SmsMessage.createFromPdu((byte[]) aObject);
        }

        return currentSMS;
    }

Please use

.FirstOrDefault()

because if in the first row of the result there is no info this instruction goes to the default info.

These are all good answers, this is what I did on a different project:

Usage:

Get Today's REAL date Time

var today = SystemTime.Now().Date;

Instead of using DateTime.Now, you need to use SystemTime.Now()... It's not hard change but this solution might not be ideal for all projects.

Time Traveling (Lets go 5 years in the future)

SystemTime.SetDateTime(today.AddYears(5));

Get Our Fake "today" (will be 5 years from 'today')

var fakeToday = SystemTime.Now().Date;

Reset the date

SystemTime.ResetDateTime();

/// <summary>
/// Used for getting DateTime.Now(), time is changeable for unit testing
/// </summary>
public static class SystemTime
{
    /// <summary> Normally this is a pass-through to DateTime.Now, but it can be overridden with SetDateTime( .. ) for testing or debugging.
    /// </summary>
    public static Func<DateTime> Now = () => DateTime.Now;

    /// <summary> Set time to return when SystemTime.Now() is called.
    /// </summary>
    public static void SetDateTime(DateTime dateTimeNow)
    {
        Now = () =>  dateTimeNow;
    }

    /// <summary> Resets SystemTime.Now() to return DateTime.Now.
    /// </summary>
    public static void ResetDateTime()
    {
        Now = () => DateTime.Now;
    }
}

As of .NET 5 RC2 you can use:

• Convert.ToHexString(byte[] inArray) which returns a string and
• Convert.FromHexString(string s) which returns a byte[].

Overloads are available that take span parameters.

Why are you grouping by? Do you mean order by?

SELECT player_name, player_salary, player_salary * 1.1 AS NewSalary
FROM players
ORDER BY player_salary, player_name;

nginx, like all well-behaved programs, can be configured not to self-daemonize.

Use the daemon off configuration directive described in http://wiki.nginx.org/CoreModule.

If you want to compare with a particular date , You can directly write it like :

select * from `table_name` where timestamp >= '2018-07-07';

// here the timestamp is the name of the column having type as timestamp

or

For fetching today date , CURDATE() function is available , so :

select * from `table_name` where timestamp >=  CURDATE();

Note: This is some explanation and pseudocode as to how to implement a very trivial server that can handle incoming and outcoming WebSocket messages as per the definitive framing format. It does not include the handshaking process. Furthermore, this answer has been made for educational purposes; it is not a full-featured implementation.

Specification (RFC 6455)

Sending messages

(In other words, server → browser)

The frames you're sending need to be formatted according to the WebSocket framing format. For sending messages, this format is as follows:

• one byte which contains the type of data (and some additional info which is out of scope for a trivial server)
• one byte which contains the length
• either two or eight bytes if the length does not fit in the second byte (the second byte is then a code saying how many bytes are used for the length)
• the actual (raw) data

The first byte will be 1000 0001 (or 129) for a text frame.

The second byte has its first bit set to 0 because we're not encoding the data (encoding from server to client is not mandatory).

It is necessary to determine the length of the raw data so as to send the length bytes correctly:

• if 0 <= length <= 125, you don't need additional bytes
• if 126 <= length <= 65535, you need two additional bytes and the second byte is 126
• if length >= 65536, you need eight additional bytes, and the second byte is 127

The length has to be sliced into separate bytes, which means you'll need to bit-shift to the right (with an amount of eight bits), and then only retain the last eight bits by doing AND 1111 1111 (which is 255).

After the length byte(s) comes the raw data.

This leads to the following pseudocode:

bytesFormatted[0] = 129

indexStartRawData = -1 // it doesn't matter what value is
                       // set here - it will be set now:

if bytesRaw.length <= 125
    bytesFormatted[1] = bytesRaw.length

    indexStartRawData = 2

else if bytesRaw.length >= 126 and bytesRaw.length <= 65535
    bytesFormatted[1] = 126
    bytesFormatted[2] = ( bytesRaw.length >> 8 ) AND 255
    bytesFormatted[3] = ( bytesRaw.length      ) AND 255

    indexStartRawData = 4

else
    bytesFormatted[1] = 127
    bytesFormatted[2] = ( bytesRaw.length >> 56 ) AND 255
    bytesFormatted[3] = ( bytesRaw.length >> 48 ) AND 255
    bytesFormatted[4] = ( bytesRaw.length >> 40 ) AND 255
    bytesFormatted[5] = ( bytesRaw.length >> 32 ) AND 255
    bytesFormatted[6] = ( bytesRaw.length >> 24 ) AND 255
    bytesFormatted[7] = ( bytesRaw.length >> 16 ) AND 255
    bytesFormatted[8] = ( bytesRaw.length >>  8 ) AND 255
    bytesFormatted[9] = ( bytesRaw.length       ) AND 255

    indexStartRawData = 10

// put raw data at the correct index
bytesFormatted.put(bytesRaw, indexStartRawData)


// now send bytesFormatted (e.g. write it to the socket stream)

Receiving messages

(In other words, browser → server)

The frames you obtain are in the following format:

• one byte which contains the type of data
• one byte which contains the length
• either two or eight additional bytes if the length did not fit in the second byte
• four bytes which are the masks (= decoding keys)
• the actual data

The first byte usually does not matter - if you're just sending text you are only using the text type. It will be 1000 0001 (or 129) in that case.

The second byte and the additional two or eight bytes need some parsing, because you need to know how many bytes are used for the length (you need to know where the real data starts). The length itself is usually not necessary since you have the data already.

The first bit of the second byte is always 1 which means the data is masked (= encoded). Messages from the client to the server are always masked. You need to remove that first bit by doing secondByte AND 0111 1111. There are two cases in which the resulting byte does not represent the length because it did not fit in the second byte:

• a second byte of 0111 1110, or 126, means the following two bytes are used for the length
• a second byte of 0111 1111, or 127, means the following eight bytes are used for the length

The four mask bytes are used for decoding the actual data that has been sent. The algorithm for decoding is as follows:

decodedByte = encodedByte XOR masks[encodedByteIndex MOD 4]

where encodedByte is the original byte in the data, encodedByteIndex is the index (offset) of the byte counting from the first byte of the real data, which has index 0. masks is an array containing of the four mask bytes.

This leads to the following pseudocode for decoding:

secondByte = bytes[1]

length = secondByte AND 127 // may not be the actual length in the two special cases

indexFirstMask = 2          // if not a special case

if length == 126            // if a special case, change indexFirstMask
    indexFirstMask = 4

else if length == 127       // ditto
    indexFirstMask = 10

masks = bytes.slice(indexFirstMask, 4) // four bytes starting from indexFirstMask

indexFirstDataByte = indexFirstMask + 4 // four bytes further

decoded = new array

decoded.length = bytes.length - indexFirstDataByte // length of real data

for i = indexFirstDataByte, j = 0; i < bytes.length; i++, j++
    decoded[j] = bytes[i] XOR masks[j MOD 4]


// now use "decoded" to interpret the received data

With recent browsers you can use the HTML5 download attribute as well:

<a download="quot.pdf" href="../doc/quot.pdf">Click here to Download quotation</a>

It is supported by most of the recent browsers except MSIE11. You can use a polyfill, something like this (note that this is for data uri only, but it is a good start):

(function (){

    addEvent(window, "load", function (){
        if (isInternetExplorer())
            polyfillDataUriDownload();
    });

    function polyfillDataUriDownload(){
        var links = document.querySelectorAll('a[download], area[download]');
        for (var index = 0, length = links.length; index<length; ++index) {
            (function (link){
                var dataUri = link.getAttribute("href");
                var fileName = link.getAttribute("download");
                if (dataUri.slice(0,5) != "data:")
                    throw new Error("The XHR part is not implemented here.");
                addEvent(link, "click", function (event){
                    cancelEvent(event);
                    try {
                        var dataBlob = dataUriToBlob(dataUri);
                        forceBlobDownload(dataBlob, fileName);
                    } catch (e) {
                        alert(e)
                    }
                });
            })(links[index]);
        }
    }

    function forceBlobDownload(dataBlob, fileName){
        window.navigator.msSaveBlob(dataBlob, fileName);
    }

    function dataUriToBlob(dataUri) {
        if  (!(/base64/).test(dataUri))
            throw new Error("Supports only base64 encoding.");
        var parts = dataUri.split(/[:;,]/),
            type = parts[1],
            binData = atob(parts.pop()),
            mx = binData.length,
            uiArr = new Uint8Array(mx);
        for(var i = 0; i<mx; ++i)
            uiArr[i] = binData.charCodeAt(i);
        return new Blob([uiArr], {type: type});
    }

    function addEvent(subject, type, listener){
        if (window.addEventListener)
            subject.addEventListener(type, listener, false);
        else if (window.attachEvent)
            subject.attachEvent("on" + type, listener);
    }

    function cancelEvent(event){
        if (event.preventDefault)
            event.preventDefault();
        else
            event.returnValue = false;
    }

    function isInternetExplorer(){
        return /*@cc_on!@*/false || !!document.documentMode;
    }
    
})();

Here is a more complete answer with regard to InnoDB. It is a bit of a lengthy process, but can be worth the effort.

Keep in mind that /var/lib/mysql/ibdata1 is the busiest file in the InnoDB infrastructure. It normally houses six types of information:

• Table Data
• Table Indexes
• MVCC (Multiversioning Concurrency Control) Data
  • Rollback Segments
  • Undo Space
• Table Metadata (Data Dictionary)
• Double Write Buffer (background writing to prevent reliance on OS caching)
• Insert Buffer (managing changes to non-unique secondary indexes)
• See the Pictorial Representation of ibdata1

InnoDB Architecture

Many people create multiple ibdata files hoping for better disk-space management and performance, however that belief is mistaken.

Can I run OPTIMIZE TABLE ?

Unfortunately, running OPTIMIZE TABLE against an InnoDB table stored in the shared table-space file ibdata1 does two things:

• Makes the table’s data and indexes contiguous inside ibdata1
• Makes ibdata1 grow because the contiguous data and index pages are appended to ibdata1

You can however, segregate Table Data and Table Indexes from ibdata1 and manage them independently.

Can I run OPTIMIZE TABLE with innodb_file_per_table ?

Suppose you were to add innodb_file_per_table to /etc/my.cnf (my.ini). Can you then just run OPTIMIZE TABLE on all the InnoDB Tables?

Good News : When you run OPTIMIZE TABLE with innodb_file_per_table enabled, this will produce a .ibd file for that table. For example, if you have table mydb.mytable witha datadir of /var/lib/mysql, it will produce the following:

• /var/lib/mysql/mydb/mytable.frm
• /var/lib/mysql/mydb/mytable.ibd

The .ibd will contain the Data Pages and Index Pages for that table. Great.

Bad News : All you have done is extract the Data Pages and Index Pages of mydb.mytable from living in ibdata. The data dictionary entry for every table, including mydb.mytable, still remains in the data dictionary (See the Pictorial Representation of ibdata1). YOU CANNOT JUST SIMPLY DELETE ibdata1 AT THIS POINT !!! Please note that ibdata1 has not shrunk at all.

InnoDB Infrastructure Cleanup

To shrink ibdata1 once and for all you must do the following:

1. Dump (e.g., with mysqldump) all databases into a .sql text file (SQLData.sql is used below)

2. Drop all databases (except for mysql and information_schema) CAVEAT : As a precaution, please run this script to make absolutely sure you have all user grants in place:

   mkdir /var/lib/mysql_grants
   cp /var/lib/mysql/mysql/* /var/lib/mysql_grants/.
   chown -R mysql:mysql /var/lib/mysql_grants
   

3. Login to mysql and run SET GLOBAL innodb_fast_shutdown = 0; (This will completely flush all remaining transactional changes from ib_logfile0 and ib_logfile1)

4. Shutdown MySQL

5. Add the following lines to /etc/my.cnf (or my.ini on Windows)

   [mysqld]
   innodb_file_per_table
   innodb_flush_method=O_DIRECT
   innodb_log_file_size=1G
   innodb_buffer_pool_size=4G
   

   (Sidenote: Whatever your set for innodb_buffer_pool_size, make sure innodb_log_file_size is 25% of innodb_buffer_pool_size.

   Also: innodb_flush_method=O_DIRECT is not available on Windows)

6. Delete ibdata* and ib_logfile*, Optionally, you can remove all folders in /var/lib/mysql, except /var/lib/mysql/mysql.

7. Start MySQL (This will recreate ibdata1 [10MB by default] and ib_logfile0 and ib_logfile1 at 1G each).

8. Import SQLData.sql

Now, ibdata1 will still grow but only contain table metadata because each InnoDB table will exist outside of ibdata1. ibdata1 will no longer contain InnoDB data and indexes for other tables.

For example, suppose you have an InnoDB table named mydb.mytable. If you look in /var/lib/mysql/mydb, you will see two files representing the table:

• mytable.frm (Storage Engine Header)
• mytable.ibd (Table Data and Indexes)

With the innodb_file_per_table option in /etc/my.cnf, you can run OPTIMIZE TABLE mydb.mytable and the file /var/lib/mysql/mydb/mytable.ibd will actually shrink.

I have done this many times in my career as a MySQL DBA. In fact, the first time I did this, I shrank a 50GB ibdata1 file down to only 500MB!

Give it a try. If you have further questions on this, just ask. Trust me; this will work in the short term as well as over the long haul.

CAVEAT

At Step 6, if mysql cannot restart because of the mysql schema begin dropped, look back at Step 2. You made the physical copy of the mysql schema. You can restore it as follows:

mkdir /var/lib/mysql/mysql
cp /var/lib/mysql_grants/* /var/lib/mysql/mysql
chown -R mysql:mysql /var/lib/mysql/mysql

Go back to Step 6 and continue

UPDATE 2013-06-04 11:13 EDT

With regard to setting innodb_log_file_size to 25% of innodb_buffer_pool_size in Step 5, that's blanket rule is rather old school.

Back on July 03, 2006, Percona had a nice article why to choose a proper innodb_log_file_size. Later, on Nov 21, 2008, Percona followed up with another article on how to calculate the proper size based on peak workload keeping one hour's worth of changes.

I have since written posts in the DBA StackExchange about calculating the log size and where I referenced those two Percona articles.

• Aug 27, 2012 : Proper tuning for 30GB InnoDB table on server with 48GB RAM
• Jan 17, 2013 : MySQL 5.5 - Innodb - innodb_log_file_size higher than 4GB combined?

Personally, I would still go with the 25% rule for an initial setup. Then, as the workload can more accurate be determined over time in production, you could resize the logs during a maintenance cycle in just minutes.

Try including stdint.h or inttypes.h.

It's possible that you've run out of memory or some space elsewhere and it prompted the system to mount an overflow filesystem, and for whatever reason, it's not going away.

Try unmounting the overflow partition:

umount /tmp

or

umount overflow

You can add a menu item to toggle ReSharper if you don't want to use the command window or a shortcut key. Sadly the ReSharper_ToggleSuspended command can't be directly added to a menu (there's an open issue on that), but it's easy enough to work around:

Create a macro like this:

Sub ToggleResharper()

    DTE.ExecuteCommand("ReSharper_ToggleSuspended")

End Sub

Then add a menu item to run that macro:

1. Tools | Customize...
2. Choose the Commands tab
3. Choose the menu you want to put the item on
4. Click Add Command...
5. In the list on the left, choose "Macros"
6. In the resulting list on the right, choose the macro
7. Click OK
8. Highlight your new command in the list and click Modify Selection... to set the menu item text etc.

I have changed the implementation of it to get your problem solved, I made an object to track the old changes and compare it with that. You can use it to solve your issue.

Here I created a method, in which the old value will be stored in a separate variable and, which then will be used in a watch.

new Vue({
  methods: {
    setValue: function() {
      this.$data.oldPeople = _.cloneDeep(this.$data.people);
    },
  },
  mounted() {
    this.setValue();
  },
  el: '#app',
  data: {
    people: [
      {id: 0, name: 'Bob', age: 27},
      {id: 1, name: 'Frank', age: 32},
      {id: 2, name: 'Joe', age: 38}
    ],
    oldPeople: []
  },
  watch: {
    people: {
      handler: function (after, before) {
        // Return the object that changed
        var vm = this;
        let changed = after.filter( function( p, idx ) {
          return Object.keys(p).some( function( prop ) {
            return p[prop] !== vm.$data.oldPeople[idx][prop];
          })
        })
        // Log it
        vm.setValue();
        console.log(changed)
      },
      deep: true,
    }
  }
})

See the updated codepen

try
{
  // load the assembly or type
}
catch (Exception ex)
{
  if (ex is System.Reflection.ReflectionTypeLoadException)
  {
    var typeLoadException = ex as ReflectionTypeLoadException;
    var loaderExceptions  = typeLoadException.LoaderExceptions;
  }
}

Maybe something like this:

connected = False

while not connected:
    try:
        try_connect()
        connected = True
    except ...:
        pass

I use EclipseLink. This JPA allows the following way for the native queries:

Query q = em.createNativeQuery("SELECT * FROM mytable where username = ?username");
q.setParameter("username", "test");
q.getResultList();

This works fine to me:

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
     ControlToValidate="YourTextBoxID"
     ErrorMessage="Only numeric allowed." ForeColor="Red"
     ValidationExpression="^[0-9]*$" ValidationGroup="NumericValidate">*
</asp:RegularExpressionValidator>

I think you should add ValidationGroup="NumericValidate" to your submit button also.

My answer complements @maroun these are some ways to initialize an array:

Use an array

val numbers = arrayOf(1,2,3,4,5)

Use a strict array

val numbers = intArrayOf(1,2,3,4,5)

Mix types of matrices

val numbers = arrayOf(1,2,3.0,4f)

Nesting arrays

val numbersInitials = intArrayOf(1,2,3,4,5)
val numbers = arrayOf(numbersInitials, arrayOf(6,7,8,9,10))

Ability to start with dynamic code

val numbers = Array(5){ it*2}

<?php

    require 'database.php';

    $id = $_GET['id'];

    $image = "SELECT * FROM slider WHERE id = '$id'";
    $query = mysqli_query($connect, $image);
    $after = mysqli_fetch_assoc($query);

    if ($after['image'] != 'default.png') {
        unlink('../slider/'.$after['image']);
    }

    $delete = "DELETE FROM slider WHERE id = $id";
    $query = mysqli_query($connect, $delete);

    if ($query) {
        header('location: slider.php');
    }

?>

First represent the epoch of the millisecond time as a date (usually 1/1/1970), then add your millisecond time divided by the number of milliseconds in a day (86400000):

=DATE(1970,1,1)+(A1/86400000)

If your cell is properly formatted, you should see a human-readable date/time.

Most simple approach in Template driven forms for min/max validation with out using reactive forms and building any directive, would be to use pattern attribute of html. This has already been explained and answered here please look https://stackoverflow.com/a/63312336/14069524

You can repeat it by fetching again the data

 while($row = mysql_fetch_assoc($result)){
 //another html element
 <div>$row['name']</div>
 <div>$row['title']</div>
 //and so on
 }

or you need to put it on the variable and call display it again on other html element

 $name = $row['name'];
 $title = $row['title']
 //and so on

then put it on the other element, but if you want to call all the data of each id, you need to do the first code

See this resultant operator was opposite to the Timezone .So apply some math function then validate the num less or more.

See the MDN document

var a = new Date().getTimezoneOffset();_x000D_
_x000D_
var res = -Math.round(a/60)+':'+-(a%60);_x000D_
res = res < 0 ?res : '+'+res;_x000D_
_x000D_
console.log(res)

Update: AdoptOpenJDK has changed its name to Adoptium, as part of its move to the Eclipse Foundation.

OpenJDK ? source code
Adoptium/AdoptOpenJDK ? builds

Difference between OpenJDK and AdoptOpenJDK

The first provides source-code, the other provides builds of that source-code.

• OpenJDK is an open-source project providing source-code (not builds) of an implementation of the Java platform as defined by:
  • the Java Specifications
  • Java Specification Request (JSR) documents published by Oracle via the Java Community Process
  • JDK Enhancement Proposal (JEP) documents published by Oracle via the OpenJDK project
• AdoptOpenJDK is an organization founded by some prominent members of the Java community aimed at providing binary builds and installers at no cost for users of Java technology.

Several vendors of Java & OpenJDK

Adoptium of the Eclipse Foundation, formerly known as AdoptOpenJDK, is only one of several vendors distributing implementations of the Java platform. These include:

• Eclipse Foundation (Adoptium/AdoptOpenJDK)
• Azul Systems
• Oracle
• Red Hat / IBM
• BellSoft
• SAP
• Amazon AWS
• … and more

See this flowchart of mine to help guide you in picking a vendor for an implementation of the Java platform. Click/tap to zoom.

Another resource: This comparison matrix by Azul Systems is useful, and seems true and fair to my mind.

Here is a list of considerations and motivations to consider in choosing a vendor and implementation.

Some vendors offer you a choice of JIT technologies.

To understand more about this Java ecosystem, read Java Is Still Free

Optionals and default parameters are two different things.

An Optional is a variable that can be nil, that's it.

Default parameters use a default value when you omit that parameter, this default value is specified like this: func test(param: Int = 0)

If you specify a parameter that is an optional, you have to provide it, even if the value you want to pass is nil. If your function looks like this func test(param: Int?), you can't call it like this test(). Even though the parameter is optional, it doesn't have a default value.

You can also combine the two and have a parameter that takes an optional where nil is the default value, like this: func test(param: Int? = nil).

I think all these answers are missing the question. The problem was to "Round UP", not just "Round". It is my understanding that Round Up means that ANY fractional value about a whole digit rounds up to the next WHOLE digit. ie: 48.0000000 = 48 but 25.00001 = 26. Is this not the definition of rounding up? (or have my past 60 years in accounting been misplaced?

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="100dp">
<EditText
    android:id="@+id/question_input"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:ems="10"
    android:inputType="text|textMultiLine"
    android:lineSpacingExtra="5sp"
    android:padding="5dp"
    android:textAlignment="textEnd"
    android:typeface="normal" />

</android.support.v4.widget.NestedScrollView>

You can run this command for making a factory reset:

killall dropbear uhttpd; sleep 1; mtd -r erase rootfs_data

Try this:

int index = row.Table.Columns["ColumnName"].Ordinal;

<?php

use PHPMailer\PHPMailer\PHPMailer;

require_once "PHPMailer/src/Exception.php";
require_once "PHPMailer/src/PHPMailer.php";
require_once "PHPMailer/src/SMTP.php";



$mail = new PHPMailer();

$mail ->isSMTP();
$mail ->Host ="smtp.gmail.com";
$mail -> SMTPAuth = true;
$mail ->Username = '[email protected]';
$mail ->Password = 'password';
//$mail ->SMTPSecure=PHPMailer::ENCRYPTION_STARTTLS;
$mail ->Port = '587';
$mail ->SMTPSecure ='tls';
$mail ->isHTML(true);

$mail ->setFrom('[email protected]','email send name');

$mail ->addAddress('[email protected]');
$mail ->Subject = 'HelloWorld';
$mail ->Body = 'a test email';


$mail->SMTPOptions = array(
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    )
);



if ($mail->send()){
    echo "Message has been sent successfully";
}else{
    echo "Mailer Error: " . $mail->ErrorInfo;
}

?>

make sure that you configure less secure app settings in gmail using this link https://www.google.com/settings/security/lesssecureapps and make sure you downloaded PHPMailer-master.zip from github

working fine with MAMP server locally :)

You are using two WHERE clauses but only one is allowed. Use it like this:

SELECT table1.f_id FROM table1
INNER JOIN table2 ON table2.f_id = table1.f_id
WHERE
  table1.f_com_id = '430'
  AND table1.f_status = 'Submitted'
  AND table2.f_type = 'InProcess'

If the size of the arrays are known prior then we could use the union to our help. Like this-

#include <bits/stdc++.h>
using namespace std;

union ua{
    int arr[2][3];
    int brr[3][2];
};

int main() {
    union ua uav;
    int karr[2][3] = {{1,2,3},{4,5,6}};
    memcpy(uav.arr,karr,sizeof(karr));
    for (int i=0;i<3;i++)
    {
        for (int j=0;j<2;j++)
            cout<<uav.brr[i][j]<<" ";
        cout<<'\n';
    }

    return 0;
}

For database separate out Data Access Service that will do all DB work with simple API and avoid shared state.

Separating routes.setup looks like overhead. I would prefer to place a configuration based routing instead. And configure routes in .json or with annotations.

There is a built-in way to format LocalDate in Joda library

import org.joda.time.LocalDate;

LocalDate localDate = LocalDate.now();
String dateFormat = "MM/dd/yyyy";
localDate.toString(dateFormat);

In case you don't have it already - add this to the build.gradle:

implementation 'joda-time:joda-time:2.9.5'

Happy coding! :)

Check out this micro news aggregator called EveryBlock.

It's entirely written in Django. In fact they are the people who developed the Django framework itself.

Example of pure js with going right or left

        window.addEventListener('keydown', function (e) {
            // go to the right
            if (e.keyCode == 39) {

            }
            // go to the left
            if (e.keyCode == 37) {

            }
        });

the below codes helped me with the same problem. Let me know if it helped.

<!DOCTYPE html>
<html>
<body>


<audio controls>

<source src="YOUR AUDIO FILE" type="audio/mpeg">
Your browser does not support the audio element.
</audio>



</body>
</html>

insert into AGREGADORES_AGREGADORES (IDAGREGADOR,NOMBRE,URL)
values (2,'Netvibes',
'http://www.netvibes.com/subscribe.php?type=rss' || chr(38) || 'amp;url=');

Use this:

from c in dc.Organization
where SqlMethods.Like(c.Hierarchy, "%/12/%")
select *;

For the parent element, add the following properties:

.parent {
    overflow: hidden;
    position: relative;
    width: 100%;
}

then for .child-right these:

.child-right {
    background:green;
    height: 100%;
    width: 50%;
    position: absolute;
    right: 0;
    top: 0;
}

Find more detailed results with CSS examples here and more information about equal height columns here.

Without any server side solution, Theres is only one way in which a secure page can get something from a insecure page/request and that's thought postMessage and a popup

I said popup cuz the site isn't allowed to mix content. But a popup isn't really mixing. It has it's own window but are still able to communicate with the opener with postMessage.

So you can open a new http-page with window.open(...) and have that making the request for you (that is if the site is using CORS as well)

XDomain came to mind when i wrote this but here is a modern approach using the new fetch api, the advantage is the streaming of large files, the downside is that it won't work in all browser

You put this proxy script on any http page

onmessage = evt => {
  const port = evt.ports[0]

  fetch(...evt.data).then(res => {
    // the response is not clonable
    // so we make a new plain object
    const obj = {
      bodyUsed: false,
      headers: [...res.headers],
      ok: res.ok,
      redirected: res.redurected,
      status: res.status,
      statusText: res.statusText,
      type: res.type,
      url: res.url
    }

    port.postMessage(obj)

    // Pipe the request to the port (MessageChannel)
    const reader = res.body.getReader()
    const pump = () => reader.read()
    .then(({value, done}) => done 
      ? port.postMessage(done)
      : (port.postMessage(value), pump())
    )

    // start the pipe
    pump()
  })
}

Then you open a popup window in your https page (note that you can only do this on a user interaction event or else it will be blocked)

window.popup = window.open(http://.../proxy.html)

create your utility function

function xfetch(...args) {
  // tell the proxy to make the request
  const ms = new MessageChannel
  popup.postMessage(args, '*', [ms.port1])

  // Resolves when the headers comes
  return new Promise((rs, rj) => {

    // First message will resolve the Response Object
    ms.port2.onmessage = ({data}) => {
      const stream = new ReadableStream({
        start(controller) {

          // Change the onmessage to pipe the remaning request
          ms.port2.onmessage = evt => {
            if (evt.data === true) // Done?
              controller.close()
            else // enqueue the buffer to the stream
              controller.enqueue(evt.data)
          }
        }
      })

      // Construct a new response with the 
      // response headers and a stream
      rs(new Response(stream, data))
    }
  })
}

And make the request like you normally do with the fetch api

xfetch('http://httpbin.org/get')
  .then(res => res.text())
  .then(console.log)

Kotlin's String class has a format function now, which internally uses Java's String.format method:

/**
 * Uses this string as a format string and returns a string obtained by substituting the specified arguments,
 * using the default locale.
 */
@kotlin.internal.InlineOnly
public inline fun String.Companion.format(format: String, vararg args: Any?): String = java.lang.String.format(format, *args)

Usage

val pi = 3.14159265358979323
val formatted = String.format("%.2f", pi) ;
println(formatted)
>>3.14

        TextView tv = (TextView)findViewById(R.id.item_title));
        RelativeLayout.LayoutParams mRelativelp = (RelativeLayout.LayoutParams) tv
                    .getLayoutParams();
        mRelativelp.setMargins(DptoPxConvertion(15), 0, DptoPxConvertion (15), 0);
        tv.setLayoutParams(mRelativelp);

    private int DptoPxConvertion(int dpValue)
    {
       return (int)((dpValue * mContext.getResources().getDisplayMetrics().density) + 0.5);
    }

getLayoutParams() of textview should be casted to the corresponding Params based on the Parent of the textview in xml.

<RelativeLayout>
   <TextView
    android:id="@+id/item_title">
</RelativeLayout>

To render the same real size on different devices use DptoPxConvertion() method which I have used above. setMargin(left,top,right,bottom) params will take values in pixel not in dp. For further reference see this Link Answer

I see std::weak_ptr<T> as a handle to a std::shared_ptr<T>: It allows me to get the std::shared_ptr<T> if it still exists, but it will not extend its lifetime. There are several scenarios when such point of view is useful:

// Some sort of image; very expensive to create.
std::shared_ptr< Texture > texture;

// A Widget should be able to quickly get a handle to a Texture. On the
// other hand, I don't want to keep Textures around just because a widget
// may need it.

struct Widget {
    std::weak_ptr< Texture > texture_handle;
    void render() {
        if (auto texture = texture_handle.get(); texture) {
            // do stuff with texture. Warning: `texture`
            // is now extending the lifetime because it
            // is a std::shared_ptr< Texture >.
        } else {
            // gracefully degrade; there's no texture.
        }
    }
};

Another important scenario is to break cycles in data structures.

// Asking for trouble because a node owns the next node, and the next node owns
// the previous node: memory leak; no destructors automatically called.
struct Node {
    std::shared_ptr< Node > next;
    std::shared_ptr< Node > prev;
};

// Asking for trouble because a parent owns its children and children own their
// parents: memory leak; no destructors automatically called.
struct Node {
    std::shared_ptr< Node > parent;
    std::shared_ptr< Node > left_child;
    std::shared_ptr< Node > right_child;
};

// Better: break dependencies using a std::weak_ptr (but not best way to do it;
// see Herb Sutter's talk).
struct Node {
    std::shared_ptr< Node > next;
    std::weak_ptr< Node > prev;
};

// Better: break dependencies using a std::weak_ptr (but not best way to do it;
// see Herb Sutter's talk).
struct Node {
    std::weak_ptr< Node > parent;
    std::shared_ptr< Node > left_child;
    std::shared_ptr< Node > right_child;
};

Herb Sutter has an excellent talk that explains the best use of language features (in this case smart pointers) to ensure Leak Freedom by Default (meaning: everything clicks in place by construction; you can hardly screw it up). It is a must watch.

Very generally speaking:

An API key simply identifies you.

If there is a public/private distinction, then the public key is one that you can distribute to others, to allow them to get some subset of information about you from the api. The private key is for your use only, and provides access to all of your data.

Depending on what exactly you need:

• is null checks whether the value is null:

  {% if var is null %}
      {# do something #}
  {% endif %}
  

• is defined checks whether the variable is defined:

  {% if var is not defined %}
      {# do something #}
  {% endif %}
  

Additionally the is sameas test, which does a type strict comparison of two values, might be of interest for checking values other than null (like false):

{% if var is sameas(false) %}
    {# do something %}
{% endif %}

Below is the Update query which includes JOIN & WHERE both. Same way we can use multiple join/where clause, Hope it will help you :-

UPDATE opportunities_cstm oc JOIN opportunities o ON oc.id_c = o.id
 SET oc.forecast_stage_c = 'APX'
 WHERE o.deleted = 0
   AND o.sales_stage IN('ABC','PQR','XYZ')

Like this... I used it to read Chinese characters...

Dim reader as StreamReader = My.Computer.FileSystem.OpenTextFileReader(filetoimport.Text)
Dim a as String

Do
   a = reader.ReadLine
   '
   ' Code here
   '
Loop Until a Is Nothing

reader.Close()

The easiest solution for your case - change the first line, let it do just the opposite thing:

String lower = Name.toUpperCase ();

Of course, it's worth to change its name too.

The easy way to do this is to put the Date function you want to use in a Cell, and link to that cell from the textbox with the LinkedCell property.

From VBA you might try using:

textbox.Value = Format(Date(),"mm/dd/yy")

var month = mydate.getMonth(); // month (in integer 0-11)
var year = mydate.getFullYear(); // year

Then all you would need to have is an array of months:

var months = ['Jan', 'Feb', 'Mar', ...];

And then to show it:

alert(months[month] + "  " + year);

I had a problem with a big delay between calling setNeedsDisplay and drawRect: (5 seconds). It turned out I called setNeedsDisplay in a different thread than the main thread. After moving this call to the main thread the delay went away.

Hope this is of some help.

If it is Long you can check if it's null unless you go for long (as primitive data types cant be null while Long instance is a object)

Long num; _x000D_
_x000D_
if(num == null) return;

For some context, you can also prefer using Optional with it to make it somehow beautiful for some use cases. Refer @RequestParam in Spring MVC handling optional parameters

Window Page Scrollbar clickable when Modal is open

This one works for me. Pure CSS.

<style type="text/css">

body.modal-open {
padding-right: 17px !important;
}

.modal-backdrop.in {
margin-right: 16px; 

</style>

Try it and let me know

If you have empty rows, not NAs, you can do:

data[!apply(data == "", 1, all),]

To remove both (NAs and empty):

data <- data[!apply(is.na(data) | data == "", 1, all),]

Using vector drawable:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
   android:width="24dp"
   android:height="24dp"
   android:viewportWidth="24.0"
   android:viewportHeight="24.0">
   <path
        android:pathData="M0,0 L24,0 L0,24 z"
        android:strokeColor="@color/color"
        android:fillColor="@color/color"/>
</vector>

Use DataSet(C#) with JavaScript. A simple function for creating a JSON stream with DataSet input. Create JSON content like (multi table dataset):

[[{a:1,b:2,c:3},{a:3,b:5,c:6}],[{a:23,b:45,c:35},{a:58,b:59,c:45}]]

Just client side, use eval. For example,

var d = eval('[[{a:1,b:2,c:3},{a:3,b:5,c:6}],[{a:23,b:45,c:35},{a:58,b:59,c:45}]]')

Then use:

d[0][0].a // out 1 from table 0 row 0

d[1][1].b // out 59 from table 1 row 1

// Created by Behnam Mohammadi And Saeed Ahmadian
public string jsonMini(DataSet ds)
{
    int t = 0, r = 0, c = 0;
    string stream = "[";

    for (t = 0; t < ds.Tables.Count; t++)
    {
        stream += "[";
        for (r = 0; r < ds.Tables[t].Rows.Count; r++)
        {
            stream += "{";
            for (c = 0; c < ds.Tables[t].Columns.Count; c++)
            {
                stream += ds.Tables[t].Columns[c].ToString() + ":'" +
                          ds.Tables[t].Rows[r][c].ToString() + "',";
            }
            if (c>0)
                stream = stream.Substring(0, stream.Length - 1);
            stream += "},";
        }
        if (r>0)
            stream = stream.Substring(0, stream.Length - 1);
        stream += "],";
    }
    if (t>0)
        stream = stream.Substring(0, stream.Length - 1);
    stream += "];";
    return stream;
}

Super simple in-place assignment: df['new'] = 0

For in-place modification, perform direct assignment. This assignment is broadcasted by pandas for each row.

df = pd.DataFrame('x', index=range(4), columns=list('ABC'))
df

   A  B  C
0  x  x  x
1  x  x  x
2  x  x  x
3  x  x  x

df['new'] = 'y'
# Same as,
# df.loc[:, 'new'] = 'y'
df

   A  B  C new
0  x  x  x   y
1  x  x  x   y
2  x  x  x   y
3  x  x  x   y

Note for object columns

If you want to add an column of empty lists, here is my advice:

• Consider not doing this. object columns are bad news in terms of performance. Rethink how your data is structured.
• Consider storing your data in a sparse data structure. More information: sparse data structures

• If you must store a column of lists, ensure not to copy the same reference multiple times.

  # Wrong
  df['new'] = [[]] * len(df)
  # Right
  df['new'] = [[] for _ in range(len(df))]
  

Generating a copy: df.assign(new=0)

If you need a copy instead, use DataFrame.assign:

df.assign(new='y')

   A  B  C new
0  x  x  x   y
1  x  x  x   y
2  x  x  x   y
3  x  x  x   y

And, if you need to assign multiple such columns with the same value, this is as simple as,

c = ['new1', 'new2', ...]
df.assign(**dict.fromkeys(c, 'y'))

   A  B  C new1 new2
0  x  x  x    y    y
1  x  x  x    y    y
2  x  x  x    y    y
3  x  x  x    y    y

Multiple column assignment

Finally, if you need to assign multiple columns with different values, you can use assign with a dictionary.

c = {'new1': 'w', 'new2': 'y', 'new3': 'z'}
df.assign(**c)

   A  B  C new1 new2 new3
0  x  x  x    w    y    z
1  x  x  x    w    y    z
2  x  x  x    w    y    z
3  x  x  x    w    y    z

For example you have a start program named run.sh to start it working at background do the following command line. ./run.sh &>/dev/null &

The special target .PHONY: allows to declare phony targets, so that make will not check them as actual file names: it will work all the time even if such files still exist.

You can put several .PHONY: in your Makefile :

.PHONY: all

all : prog1 prog2

...

.PHONY: clean distclean

clean :
    ...
distclean :
    ...

There is another way to declare phony targets : simply put :: without prerequisites :

all :: prog1 prog2

...

clean ::
    ...
distclean ::
    ...

The :: has other special meanings, see here, but without prerequisites it always execute the recipes, even if the target already exists, thus acting as a phony target.

This should provide you the details for current user. Powershell not needed.

whoami /groups

For versions below 12c, the plain answer is NO, at least not in the manner it is being done is SQL Server.
You can print the results, you can insert the results into tables, you can return the results as cursors from within function/procedure or return a row set from function -
but you cannot execute SELECT statement, without doing something with the results.

SQL Server

begin
    select 1+1
    select 2+2
    select 3+3
end

/* 3 result sets returned */

Oracle

SQL> begin
  2  select 1+1 from dual;
  3  end;
  4  /
select * from dual;
*
ERROR at line 2:
ORA-06550: line 2, column 1:
PLS-00428: an INTO clause is expected in this SELECT statement

Use getattr if you have an attribute in string form:

>>> class User(object):
       name = 'John'

>>> u = User()
>>> param = 'name'
>>> getattr(u, param)
'John'

Otherwise use the dot .:

>>> class User(object):
       name = 'John'

>>> u = User()
>>> u.name
'John'

1. Go to "Microsoft Visual C++ Compiler for Python 2.7" and continue based on "System Requirements" (this is what I did to put below steps together).

2. Install setuptools (setuptools 6.0 or later is required for Python to automatically detect this compiler package) either by: pip install setuptools or download "Setuptools bootstrapping installer" source from, save this file somwhere on your filestystem as "ez_python.py" and install with: python ez_python.py

3. Install wheel (wheel is recommended for producing pre-built binary packages). You can install it with: pip install wheel

4. Open Windows elevated Command Prompt cmd.exe (with "Run as administrator") to install "Microsoft Visual C++ Compiler for Python 2.7" for all users. You can use following command to do so: msiexec /i C:\users\jozko\download\VCForPython27.msi ALLUSERS=1 just use your own path to file: msiexec /i <path to MSI> ALLUSERS=1

5. Now you should be able to install pycrypto with: pip install pycrypto

You'll have to set it to zero. Zero means the script can run forever. Add the following at the start of your script:

ini_set('max_execution_time', 0);

Refer to the PHP documentation of max_execution_time

Note that:

set_time_limit(0);

will have the same effect.

To set the background color for the JFrame try this:

this.getContentPane().setBackground(Color.white);

Just type any one of the below commands to give you the latest version in the first line.

1. CSC
2. GACUTIL /l ?
3. CLRVER

You can only run these from the Visual Studio Command prompt if you have Visual Studio installed, or else if you have the .NET framework SDK, then the SDK Command prompt.

4. wmic product get description | findstr /C:".NET Framework"
5. dir /b /ad /o-n %systemroot%\Microsoft.NET\Framework\v?.*

The last command (5) will list out all the versions (except 4.5) of .NET installed, latest first.
You need to run the 4th command to see if .NET 4.5 is installed.

Another three options from the PowerShell command prompt is given below.

6.   [environment]::Version
7.   $PSVersionTable.CLRVersion
8.   gci 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -recurse | gp -name Version,Release -EA 0 |
     where { $_.PSChildName -match '^(?!S)\p{L}'} | select PSChildName, Version, Release

The last command (8) will give you all versions, including .NET 4.5.

sharing the latest on mat-dialog two ways of achieving this... 1) either you set the width and height during the open e.g.

let dialogRef = dialog.open(NwasNtdSelectorComponent, {
    data: {
        title: "NWAS NTD"
    },
    width: '600px',
    height: '600px',
    panelClass: 'epsSelectorPanel'
});

or 2) use the panelClass and style it accordingly.

1) is easiest but 2) is better and more configurable.

As far as I know, and I cant verify it now, you cannot stop remote services with the Stop-Service cmdlet or with .Net, it is not supported.

Yes it works, but it stopes the service on your local machine, not on the remote computer.

Now, if the above is correct, without remoting or wmi enabled, you could set a scheduled job on the remote system, using AT, that runs Stop-Service locally.

Shorter version of:

REGEXP_REPLACE( my_value, '[[:space:]]', '' )

Would be:

REGEXP_REPLACE( my_value, '\s')

Neither of the above statements will remove "null" characters.

To remove "nulls" encase the statement with a replace

Like so:

REPLACE(REGEXP_REPLACE( my_value, '\s'), CHR(0))

Use the basename method of the path module:

path.basename('/foo/bar/baz/asdf/quux.html')
// returns
'quux.html'

Here is the documentation the above example is taken from.

This code is all you need:

   static void Main(string[] args) {
        String xml = @"
            <transactions>
                <transaction name=""Fred"" amount=""5,20"" />
                <transaction name=""John"" amount=""10,00"" />
                <transaction name=""Fred"" amount=""3,00"" />
            </transactions>";

        XDocument xmlDocument = XDocument.Parse(xml);

        var query = from x in xmlDocument.Descendants("transaction")
                    group x by x.Attribute("name").Value into g
                    select new { Name = g.Key, Amount = g.Sum(t => Decimal.Parse(t.Attribute("amount").Value)) };

        foreach (var item in query) {
            Console.WriteLine("Name: {0}; Amount: {1:C};", item.Name, item.Amount);
        }
    }

And the content is:

Name: Fred; Amount: R$ 8,20;
Name: John; Amount: R$ 10,00;

That is the way of doing this in C# - in a declarative way!

I hope this helps,

Ricardo Lacerda Castelo Branco