Swift 3
I did it by creating a custom tabbar controller and added this code inside the viewDidLoad
method.
if let count = self.tabBar.items?.count {
for i in 0...(count-1) {
let imageNameForSelectedState = arrayOfImageNameForSelectedState[i]
let imageNameForUnselectedState = arrayOfImageNameForUnselectedState[i]
self.tabBar.items?[i].selectedImage = UIImage(named: imageNameForSelectedState)?.withRenderingMode(.alwaysOriginal)
self.tabBar.items?[i].image = UIImage(named: imageNameForUnselectedState)?.withRenderingMode(.alwaysOriginal)
}
}
let selectedColor = UIColor(red: 246.0/255.0, green: 155.0/255.0, blue: 13.0/255.0, alpha: 1.0)
let unselectedColor = UIColor(red: 16.0/255.0, green: 224.0/255.0, blue: 223.0/255.0, alpha: 1.0)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: unselectedColor], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: selectedColor], for: .selected)
It worked for me!
Right I think I know what you mean so lets see....
<div id="con">
<div id="content">Results will go here</div>
<div id="footer">Footer will always be at the bottom</div>
</div>
html,
body {
margin:0;
padding:0;
height:100%;
}
div {
outline: 1px solid;
}
#con {
min-height:100%;
position:relative;
}
#content {
height: 1000px; /* Changed this height */
padding-bottom:60px;
}
#footer {
position:absolute;
bottom:0;
width:100%;
height:60px;
}
This demo have the height of contentheight: 1000px;
so you can see what it would look like scrolling down the bottom.
This demo has the height of content height: 100px;
so you can see what it would look like with no scrolling.
So this will move the footer below the div content
but if content is not bigger then the screen (no scrolling) the footer will sit at the bottom of the screen. Think this is what you want. Have a look and a play with it.
Updated fiddles so its easier to see with backgrounds.
For Windows/WSL/Cygwin etc users:
Make sure that your line endings are standard Unix line feeds, i.e. \n
(LF) only.
Using Windows line endings \r\n
(CRLF) line endings will break the command line break.
This is because having \
at the end of a line with Windows line ending translates to
\
\r
\n
.
As Mark correctly explains above:
The line-continuation will fail if you have whitespace after the backslash and before the newline.
This includes not just space () or tabs (
\t
) but also the carriage return (\r
).
This is very simple you are trying to convert an integer to a list object !!! of course it will fail and it should ...
To demonstrate/prove this to you by using the example you provided ...just use type function for each case as below and the results will speak for itself !
>>> type(cow)
<class 'range'>
>>>
>>> type(cow[0])
<class 'int'>
>>>
>>> type(0)
<class 'int'>
>>>
>>> >>> list(0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable
>>>
This line:
layout = (LinearLayout) findViewById(R.id.statsviewlayout);
Looks for the "statsviewlayout" id in your current 'contentview'. Now you've set that here:
setContentView(new GraphTemperature(getApplicationContext()));
And i'm guessing that new "graphTemperature" does not set anything with that id.
It's a common mistake to think you can just find any view with findViewById. You can only find a view that is in the XML (or appointed by code and given an id).
The nullpointer will be thrown because the layout you're looking for isn't found, so
layout.addView(buyButton);
Throws that exception.
addition: Now if you want to get that view from an XML, you should use an inflater:
layout = (LinearLayout) View.inflate(this, R.layout.yourXMLYouWantToLoad, null);
assuming that you have your linearlayout in a file called "yourXMLYouWantToLoad.xml"
eplawless's own answer simply and effectively solves his specific problem: it replaces all "
instances in the entire argument list with \"
, which is how Bash requires double-quotes inside a double-quoted string to be represented.
To generally answer the question of how to escape double-quotes inside a double-quoted string using cmd.exe
, the Windows command-line interpreter (whether on the command line - often still mistakenly called the "DOS prompt" - or in a batch file):See bottom for a look at PowerShell.
tl;dr:
You must use ""
when passing a string to a(nother) batch file and you may use ""
with applications created with Microsoft's C/C++/.NET compilers (which also accept \"
), which on Windows includes Python and Node.js:
Example: foo.bat "We had 3"" of rain."
The following applies to batch files only:
""
is the only way to get the command interpreter (cmd.exe
) to treat the whole double-quoted string as a single argument.
Sadly, however, not only are the enclosing double-quotes retained (as usual), but so are the doubled escaped ones, so obtaining the intended string is a two-step process; e.g., assuming that the double-quoted string is passed as the 1st argument, %1
:
set "str=%~1"
removes the enclosing double-quotes; set "str=%str:""="%"
then converts the doubled double-quotes to single ones.
Be sure to use the enclosing double-quotes around the assignment parts to prevent unwanted interpretation of the values.
\"
is required - as the only option - by many other programs, (e.g., Ruby, Perl, and even Microsoft's own Windows PowerShell(!)), but ITS USE IS NOT SAFE:
\"
is what many executables and interpreters either require - including Windows PowerShell - when passed strings from the outside - or, in the case of Microsoft's compilers, support as an alternative to ""
- ultimately, though, it's up to the target program to parse the argument list.
foo.exe "We had 3\" of rain."
\"
CAN RESULT IN UNWANTED, ARBITRARY EXECUTION OF COMMANDS and/or INPUT/OUTPUT REDIRECTIONS:
& | < >
ver
command; see further below for an explanation and the next bullet point for a workaround:
foo.exe "3\" of snow" "& ver."
\""
and "^""
are robust, but limited alternatives (see section "Calling PowerShell's CLI ..." below).If you must use \"
, there are only 3 safe approaches, which are, however quite cumbersome: Tip of the hat to T S for his help.
Using (possibly selective) delayed variable expansion in your batch file, you can store literal \"
in a variable and reference that variable inside a "..."
string using !var!
syntax - see T S's helpful answer.
Only with LITERAL strings - ones NOT involving VARIABLES - do you get a similarly methodical approach: categorically ^
-escape all cmd.exe
metacharacters: " & | < >
and - if you also want to suppress variable expansion - %
:
foo.exe ^"3\^" of snow^" ^"^& ver.^"
Otherwise, you must formulate your string based on recognizing which portions of the string cmd.exe
considers unquoted due to misinterpreting \"
as closing delimiters:
in literal portions containing shell metacharacters: ^
-escape them; using the example above, it is &
that must be ^
-escaped:
foo.exe "3\" of snow" "^& ver."
in portions with %...%
-style variable references: ensure that cmd.exe
considers them part of a "..."
string and that that the variable values do not themselves have embedded, unbalanced quotes - which is not even always possible.
For background information, read on.
Note: This is based on my own experiments. Do let me know if I'm wrong.
POSIX-like shells such as Bash on Unix-like systems tokenize the argument list (string) before passing arguments individually to the target program: among other expansions, they split the argument list into individual words (word splitting) and remove quoting characters from the resulting words (quote removal). The target program is handed an array of individual arguments, with syntactic quotes removed.
By contrast, the Windows command interpreter apparently does not tokenize the argument list and simply passes the single string comprising all arguments - including quoting chars. - to the target program.
However, some preprocessing takes place before the single string is passed to the target program: ^
escape chars. outside of double-quoted strings are removed (they escape the following char.), and variable references (e.g., %USERNAME%
) are interpolated first.
Thus, unlike in Unix, it is the target program's responsibility to parse to parse the arguments string and break it down into individual arguments with quotes removed. Thus, different programs can hypothetically require differing escaping methods and there's no single escaping mechanism that is guaranteed to work with all programs - https://stackoverflow.com/a/4094897/45375 contains excellent background on the anarchy that is Windows command-line parsing.
In practice, \"
is very common, but NOT SAFE, as mentioned above:
Since cmd.exe
itself doesn't recognize \"
as an escaped double-quote, it can misconstrue later tokens on the command line as unquoted and potentially interpret them as commands and/or input/output redirections.
In a nutshell: the problem surfaces, if any of the following characters follow an opening or unbalanced \"
: & | < >
; for example:
foo.exe "3\" of snow" "& ver."
cmd.exe
sees the following tokens, resulting from misinterpreting \"
as a regular double-quote:
"3\"
of
snow" "
& ver.
Since cmd.exe
thinks that & ver.
is unquoted, it interprets it as &
(the command-sequencing operator), followed by the name of a command to execute (ver.
- the .
is ignored; ver
reports cmd.exe
's version information).
The overall effect is:
foo.exe
is invoked with the first 3 tokens only.ver
is executed.Even in cases where the accidental command does no harm, your overall command won't work as designed, given that not all arguments are passed to it.
Many compilers / interpreters recognize ONLY \"
- e.g., the GNU C/C++ compiler, Python, Perl, Ruby, even Microsoft's own Windows PowerShell when invoked from cmd.exe
- and, except (with limitations) for Windows PowerShell with \""
, for them there is no simple solution to this problem.
Essentially, you'd have to know in advance which portions of your command line are misinterpreted as unquoted, and selectively ^
-escape all instances of & | < >
in those portions.
By contrast, use of ""
is SAFE, but is regrettably only supported by Microsoft-compiler-based executables and batch files (in the case of batch files, with the quirks discussed above), which notable excludes PowerShell - see next section.
cmd.exe
or POSIX-like shells:Note: See the bottom section for how quoting is handled inside PowerShell.
When invoked from the outside - e.g., from cmd.exe
, whether from the command line or a batch file:
PowerShell [Core] v6+ now properly recognizes ""
(in addition to \"
), which is both safe to use and whitespace-preserving.
pwsh -c " ""a & c"".length "
doesn't break and correctly yields 6
Windows PowerShell (the legacy edition whose last version is 5.1) recognizes only \"
and, on Windows also """
and the more robust \""
/ "^""
(even though internally PowerShell uses `
as the escape character in double-quoted strings and also accepts ""
- see bottom section):
Calling Windows PowerShell from cmd.exe
/ a batch file:
""
breaks, because it is fundamentally unsupported:
powershell -c " ""ab c"".length "
-> error "The string is missing the terminator"\"
and """
work in principle, but aren't safe:
powershell -c " \"ab c\".length "
works as intended: it outputs 5
(note the 2 spaces)cmd.exe
metacharacters break the command, unless escaped:powershell -c " \"a& c\".length "
breaks, due to the &
, which would have to be escaped as ^&
\""
is safe, but normalize interior whitespace, which can be undesired:
powershell -c " \""a& c\"".length "
outputs 4
(!), because the 2 spaces are normalized to 1."^""
is the best choice for Windows PowerShell specifically, where it is both safe and whitespace-preserving, but with PowerShell Core (on Windows) it is the same as \""
, i.e, whitespace-normalizing. Credit goes to Venryx for discovering this approach.
powershell -c " "^""a& c"^"".length "
works: doesn't break - despite &
- and outputs 5
, i.e., correctly preserved whitespace.
PowerShell Core: pwsh -c " "^""a& c"^"".length "
works, but outputs 4
, i.e. normalizes whitespace, as \""
does.
On Unix-like platforms (Linux, macOS), when calling PowerShell [Core]'s CLI, pwsh
, from a POSIX-like shell such as bash
:
You must use \"
, which, however is both safe and whitespace-preserving:
$ pwsh -c " \"a& c|\".length" # OK: 5
^
can only be used as the escape character in unquoted strings - inside double-quoted strings, ^
is not special and treated as a literal.
^
in parameters passed to the call
statement is broken (this applies to both uses of call
: invoking another batch file or binary, and calling a subroutine in the same batch file):
^
instances in double-quoted values are inexplicably doubled, altering the value being passed: e.g., if variable %v%
contains literal value a^b
, call :foo "%v%"
assigns "a^^b"
(!) to %1
(the first parameter) in subroutine :foo
.^
with call
is broken altogether in that ^
can no longer be used to escape special characters: e.g., call foo.cmd a^&b
quietly breaks (instead of passing literal a&b
too foo.cmd
, as would be the case without call
) - foo.cmd
is never even invoked(!), at least on Windows 7.Escaping a literal %
is a special case, unfortunately, which requires distinct syntax depending on whether a string is specified on the command line vs. inside a batch file; see https://stackoverflow.com/a/31420292/45375
%%
. On the command line, %
cannot be escaped, but if you place a ^
at the start, end, or inside a variable name in an unquoted string (e.g., echo %^foo%
), you can prevent variable expansion (interpolation); %
instances on the command line that are not part of a variable reference are treated as literals (e.g, 100%
).Generally, to safely work with variable values that may contain spaces and special characters:
set "v=a & b"
assigns literal value a & b
to variable %v%
(by contrast, set v="a & b"
would make the double-quotes part of the value). Escape literal %
instances as %%
(works only in batch files - see above).echo "%v%"
does not subject the value of %v%
to interpolation and prints "a & b"
(but note that the double-quotes are invariably printed too). By contrast, echo %v%
passes literal a
to echo
, interprets &
as the command-sequencing operator, and therefore tries to execute a command named b
.^
with the call
statement.%~1
to remove enclosing double-quotes from the 1st parameter) and, sadly, there is no direct way that I know of to get echo
to print a variable value faithfully without the enclosing double-quotes.
for
-based workaround that works as long as the value has no embedded double quotes; e.g.:set "var=^&')|;,%!"
for /f "delims=" %%v in ("%var%") do echo %%~v
cmd.exe
does not recognize single-quotes as string delimiters - they are treated as literals and cannot generally be used to delimit strings with embedded whitespace; also, it follows that the tokens abutting the single-quotes and any tokens in between are treated as unquoted by cmd.exe
and interpreted accordingly.
cmd.exe
.Windows PowerShell is a much more advanced shell than cmd.exe
, and it has been a part of Windows for many years now (and PowerShell Core brought the PowerShell experience to macOS and Linux as well).
PowerShell works consistently internally with respect to quoting:
`"
or ""
to escape double-quotes''
to escape single-quotesThis works on the PowerShell command line and when passing parameters to PowerShell scripts or functions from within PowerShell.
(As discussed above, passing an escaped double-quote to PowerShell from the outside requires \"
or, more robustly, \""
- nothing else works).
Sadly, when invoking external programs from PowerShell, you're faced with the need to both accommodate PowerShell's own quoting rules and to escape for the target program:
This problematic behavior is also discussed and summarized in this answer
Double-quotes inside double-quoted strings:
Consider string "3`" of rain"
, which PowerShell-internally translates to literal 3" of rain
.
If you want to pass this string to an external program, you have to apply the target program's escaping in addition to PowerShell's; say you want to pass the string to a C program, which expects embedded double-quotes to be escaped as \"
:
foo.exe "3\`" of rain"
Note how both `"
- to make PowerShell happy - and the \
- to make the target program happy - must be present.
The same logic applies to invoking a batch file, where ""
must be used:
foo.bat "3`"`" of rain"
By contrast, embedding single-quotes in a double-quoted string requires no escaping at all.
Single-quotes inside single-quoted strings do not require extra escaping; consider '2'' of snow'
, which is PowerShell' representation of 2' of snow
.
foo.exe '2'' of snow'
foo.bat '2'' of snow'
PowerShell translates single-quoted strings to double-quoted ones before passing them to the target program.
However, double-quotes inside single-quoted strings, which do not need escaping for PowerShell, do still need to be escaped for the target program:
foo.exe '3\" of rain'
foo.bat '3"" of rain'
PowerShell v3 introduced the magic --%
option, called the stop-parsing symbol, which alleviates some of the pain, by passing anything after it uninterpreted to the target program, save for cmd.exe
-style environment-variable references (e.g., %USERNAME%
), which are expanded; e.g.:
foo.exe --% "3\" of rain" -u %USERNAME%
Note how escaping the embedded "
as \"
for the target program only (and not also for PowerShell as \`"
) is sufficient.
However, this approach:
%
characters in order to avoid environment-variable expansions.Invoke-Expression
in a second.Thus, despite its many advancements, PowerShell has not made escaping much easier when calling external programs. It has, however, introduced support for single-quoted strings.
I wonder if it's fundamentally possible in the Windows world to ever switch to the Unix model of letting the shell do all the tokenization and quote removal predictably, up front, irrespective of the target program, and then invoke the target program by passing the resulting tokens.
I had to replace new lines with br
string newString = oldString.Replace("\n", "<br />");
or if you use xml
<asp:Label ID="Label1" runat="server" Text='<%# ShowLineBreaks(Eval("Comments")) %>'></asp:Label>
Then in code behind
public string ShowLineBreaks(object text)
{
return (text.ToString().Replace("\n", "<br/>"));
}
The mantissa and exponent of an IEEE double floating point number are the values such that
value = sign * (1 + mantissa) * pow(2, exponent)
if the mantissa is of the form 0.101010101_base 2 (ie its most sigificant bit is shifted to be after the binary point) and the exponent is adjusted for bias.
Since 1.6, java.lang.Math also provides a direct method to get the unbiased exponent (called getExponent(double))
However, the numbers you're asking for are the integral and fractional parts of the number, which can be obtained using
integral = Math.floor(x)
fractional = x - Math.floor(x)
though you may you want to treat negative numbers differently (floor(-3.5) == -4.0)
, depending why you want the two parts.
I'd strongly suggest that you don't call these mantissa and exponent.
You can simply use target="_blank"
to open a page in a new tab
<a href="whatever.php" target="_blank">Opens On Another Tab</a>
Or you can simply use a javascript for onload
<body onload="window.open(url, '_blank');">
Starting an Activity is not the right approach for this behavior. Instead have your BroadcastReceiver use an intent to start a Service which can continue to run as long as possible. (See http://developer.android.com/reference/android/app/Service.html#ProcessLifecycle)
See also Persistent service
Toad for MySQL has data and schema compare features, and I believe it will even create a synchronization script. Best of all, it's freeware.
A particularly feisty example is when you decide to show a managed Dialog from an Activity using showDialog()
. If the user rotates the screen while the dialog is still open (we call this a "configuration change"), then the main Activity will go through all the ending lifecycle calls up untill onDestroy()
, will be recreated, and go back up through the lifecycles. What you might not expect however, is that onCreateDialog()
and onPrepareDialog()
(the methods that are called when you do showDialog()
and now again automatically to recreate the dialog - automatically since it is a managed dialog) are called between onStart()
and onResume()
. The pointe here is that the dialog does not cover the full screen and therefore leaves part of the main activity visible. It's a detail but it does matter!
Following Code Works Fine to Get City Name (Using Google Map Geo API) :
HTML
<p><button onclick="getLocation()">Get My Location</button></p>
<p id="demo"></p>
<script src="http://maps.google.com/maps/api/js?key=YOUR_API_KEY"></script>
SCRIPT
var x=document.getElementById("demo");
function getLocation(){
if (navigator.geolocation){
navigator.geolocation.getCurrentPosition(showPosition,showError);
}
else{
x.innerHTML="Geolocation is not supported by this browser.";
}
}
function showPosition(position){
lat=position.coords.latitude;
lon=position.coords.longitude;
displayLocation(lat,lon);
}
function showError(error){
switch(error.code){
case error.PERMISSION_DENIED:
x.innerHTML="User denied the request for Geolocation."
break;
case error.POSITION_UNAVAILABLE:
x.innerHTML="Location information is unavailable."
break;
case error.TIMEOUT:
x.innerHTML="The request to get user location timed out."
break;
case error.UNKNOWN_ERROR:
x.innerHTML="An unknown error occurred."
break;
}
}
function displayLocation(latitude,longitude){
var geocoder;
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(latitude, longitude);
geocoder.geocode(
{'latLng': latlng},
function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[0]) {
var add= results[0].formatted_address ;
var value=add.split(",");
count=value.length;
country=value[count-1];
state=value[count-2];
city=value[count-3];
x.innerHTML = "city name is: " + city;
}
else {
x.innerHTML = "address not found";
}
}
else {
x.innerHTML = "Geocoder failed due to: " + status;
}
}
);
}
You can write your own generator. The secret key is essentially a byte array. Make sure that the string that you convert to a byte array is base64 encoded.
In Java, you could do something like this.
String key = "random_secret_key";
String base64Key = DatatypeConverter.printBase64Binary(key.getBytes());
byte[] secretBytes = DatatypeConverter.parseBase64Binary(base64Key);
The notion of complex numbers was introduced in mathematics, from the need of calculating negative quadratic roots. Complex number concept was taken by a variety of engineering fields.
Today that complex numbers are widely used in advanced engineering domains such as physics, electronics, mechanics, astronomy, etc...
Real and imaginary part, of a negative square root example:
#include <stdio.h>
#include <complex.h>
int main()
{
int negNum;
printf("Calculate negative square roots:\n"
"Enter negative number:");
scanf("%d", &negNum);
double complex negSqrt = csqrt(negNum);
double pReal = creal(negSqrt);
double pImag = cimag(negSqrt);
printf("\nReal part %f, imaginary part %f"
", for negative square root.(%d)",
pReal, pImag, negNum);
return 0;
}
Another possibility is that the code being executed doesn't have the required premissions.
In my case, I got this error when using Visual Studio debugger to test a call to a web service. Visual Studio wasn't running as Administrator, which caused this exception.
Use
#pragma once
at the top of header files, so if they're included more than once in a translation unit, the text of the header will only get included and parsed once.
Autofac. https://github.com/autofac/Autofac It is really fast and pretty good. Here is a link with comparisons (made after Ninject fixed a memory leak issue).
http://www.codinginstinct.com/2008/05/ioc-container-benchmark-rerevisted.html
This link has all the information you need. Here
Shape.xml
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#EAEAEA"/>
<corners android:bottomLeftRadius="8dip"
android:topRightRadius="8dip"
android:topLeftRadius="1dip"
android:bottomRightRadius="1dip"
/>
</shape>
and main.xml
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello Android from NetBeans"/>
<Button android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Nishant Nair"
android:padding="5dip"
android:layout_gravity="center"
android:background="@drawable/button_shape"
/>
</LinearLayout>
This should give you your desired result.
Best of luck
In linux, this worked for me:
adb logcat | grep `adb shell ps | grep your.package | awk '{print $2}'`
On a Hungarian keyboard it is Ctrl + ú.
In matplotlib it would be:
import matplotlib.pyplot as plt
data = [(0, 6.0705199999997801e-08), (1, 2.1015700100300739e-08),
(2, 7.6280656623374823e-09), (3, 5.7348209304555086e-09),
(4, 3.6812203579604238e-09), (5, 4.1572516753310418e-09)]
x_val = [x[0] for x in data]
y_val = [x[1] for x in data]
print x_val
plt.plot(x_val,y_val)
plt.plot(x_val,y_val,'or')
plt.show()
which would produce:
You need to start the script with a preceding dot, this will put the exported variables in the current environment.
#!/bin/bash
...
export output="SUCCESS"
Then execute it like so
chmod +x /tmp/test.sh
. /tmp/test.sh
When you need the entire output and not just a single value, just put the output in a variable like the other answers indicate
You can accomplish this (if I understand what you are trying to do) using dynamic SQL.
The trick is that you need to create a string containing the SQL statement. That's because the tablename has to specified in the actual SQL text, when you execute the statement. The table references and column references can't be supplied as parameters, those have to appear in the SQL text.
So you can use something like this approach:
SET @stmt = 'INSERT INTO @tmpTbl1 SELECT ' + @KeyValue
+ ' AS fld1 FROM tbl' + @KeyValue
EXEC (@stmt)
First, we create a SQL statement as a string. Given a @KeyValue of 'Foo', that would create a string containing:
'INSERT INTO @tmpTbl1 SELECT Foo AS fld1 FROM tblFoo'
At this point, it's just a string. But we can execute the contents of the string, as a dynamic SQL statement, using EXECUTE
(or EXEC
for short).
The old-school sp_executesql
procedure is an alternative to EXEC, another way to execute dymamic SQL, which also allows you to pass parameters, rather than specifying all values as literals in the text of the statement.
FOLLOWUP
EBarr points out (correctly and importantly) that this approach is susceptible to SQL Injection.
Consider what would happen if @KeyValue
contained the string:
'1 AS foo; DROP TABLE students; -- '
The string we would produce as a SQL statement would be:
'INSERT INTO @tmpTbl1 SELECT 1 AS foo; DROP TABLE students; -- AS fld1 ...'
When we EXECUTE that string as a SQL statement:
INSERT INTO @tmpTbl1 SELECT 1 AS foo;
DROP TABLE students;
-- AS fld1 FROM tbl1 AS foo; DROP ...
And it's not just a DROP TABLE that could be injected. Any SQL could be injected, and it might be much more subtle and even more nefarious. (The first attacks can be attempts to retreive information about tables and columns, followed by attempts to retrieve data (email addresses, account numbers, etc.)
One way to address this vulnerability is to validate the contents of @KeyValue, say it should contain only alphabetic and numeric characters (e.g. check for any characters not in those ranges using LIKE '%[^A-Za-z0-9]%'
. If an illegal character is found, then reject the value, and exit without executing any SQL.
I think what you are being asked to do (or perhaps asking yourself?) is take a character value which matches the name of a column in a particular dataframe (possibly also given as a character). There are two tricks here. Most people learn to extract columns with the "$" operator and that won't work inside a function if the function is passed a character vecor. If the function is also supposed to accept character argument then you will need to use the get
function as well:
df1 <- data.frame(a=1:10, b=11:20)
mean_col <- function( dfrm, col ) mean( get(dfrm)[[ col ]] )
mean_col("df1", "b")
# [1] 15.5
There is sort of a semantic boundary between ordinary objects like character vectors and language objects like the names of objects. The get
function is one of the functions that lets you "promote" character values to language level evaluation. And the "$" function will NOT evaluate its argument in a function, so you need to use"[[". "$" only is useful at the console level and needs to be completely avoided in functions.
Let's suppose you have two different classes:
public class Person
{
public string Name, Email;
public Person(string name, string email)
{
Name = name;
Email = email;
}
}
class Data
{
public string Mail, SlackId;
public Data(string mail, string slackId)
{
Mail = mail;
SlackId = slackId;
}
}
Now, let's Prepare data to work with:
var people = new Person[]
{
new Person("Sudi", "[email protected]"),
new Person("Simba", "[email protected]"),
new Person("Sarah", string.Empty)
};
var records = new Data[]
{
new Data("[email protected]", "Sudi_Try"),
new Data("[email protected]", "Sudi@Test"),
new Data("[email protected]", "SimbaLion")
};
You will note that [email protected] has got two slackIds. I have made that for demonstrating how Join works.
Let's now construct the query to join Person with Data:
var query = people.Join(records,
x => x.Email,
y => y.Mail,
(person, record) => new { Name = person.Name, SlackId = record.SlackId});
Console.WriteLine(query);
After constructing the query, you could also iterate over it with a foreach like so:
foreach (var item in query)
{
Console.WriteLine($"{item.Name} has Slack ID {item.SlackId}");
}
Let's also output the result for GroupJoin:
Console.WriteLine(
people.GroupJoin(
records,
x => x.Email,
y => y.Mail,
(person, recs) => new {
Name = person.Name,
SlackIds = recs.Select(r => r.SlackId).ToArray() // You could materialize //whatever way you want.
}
));
You will notice that the GroupJoin will put all SlackIds in a single group.
It is valid. You can, for example, use it to show modals (or similar things that respond to data-toggle
and data-target
attributes).
Something like:
<a role="button" data-toggle="modal" data-target=".bs-example-modal-sm" aria-hidden="true"><i class="fa fa-phone"></i></a>
Here I use the font-awesome icon, which is better as a a
tag rather than a button
, to show a modal. Also, setting role="button"
makes the pointer change to an action type. Without either href
or role="button"
, the cursor pointer does not change.
What you're looking for are the scales for each zoom level. The numbers are in metres. Use these:
20 : 1128.497220
19 : 2256.994440
18 : 4513.988880
17 : 9027.977761
16 : 18055.955520
15 : 36111.911040
14 : 72223.822090
13 : 144447.644200
12 : 288895.288400
11 : 577790.576700
10 : 1155581.153000
9 : 2311162.307000
8 : 4622324.614000
7 : 9244649.227000
6 : 18489298.450000
5 : 36978596.910000
4 : 73957193.820000
3 : 147914387.600000
2 : 295828775.300000
1 : 591657550.500000
When you call "https://darkorbit.com/" your server figures that it's missing "www" so it redirects the call to "http://www.darkorbit.com/" and then to "https://www.darkorbit.com/", your WebView call is blocked at the first redirection as it's a "http" call. You can call "https://www.darkorbit.com/" instead and it will solve the issue.
As far as the http verb is concerned the WebRequest
might be easier. You could go for something like:
WebRequest r = WebRequest.Create("http://some.url");
r.Method = "POST";
using (var s = r.GetResponse().GetResponseStream())
{
using (var reader = new StreamReader(r, FileMode.Open))
{
var content = reader.ReadToEnd();
}
}
Obviously this lacks exception handling and writing the request body (for which you can use r.GetRequestStream()
and write it like a regular stream, but I hope it may be of some help.
When floating elements exist on the page, non-floating elements wrap around the floating elements, similar to how text goes around a picture in a newspaper. From a document perspective (the original purpose of HTML), this is how floats work.
float
vs display:inline
Before the invention of display:inline-block
, websites use float
to set elements beside each other. float
is preferred over display:inline
since with the latter, you can't set the element's dimensions (width and height) as well as vertical paddings (top and bottom) - which floated elements can do since they're treated as block elements.
The main problem is that we're using float
against its intended purpose.
Another is that while float
allows side-by-side block-level elements, floats do not impart shape to its container. It's like position:absolute
, where the element is "taken out of the layout". For instance, when an empty container contains a floating 100px x 100px <div>
, the <div>
will not impart 100px in height to the container.
Unlike position:absolute
, it affects the content that surrounds it. Content after the floated element will "wrap" around the element. It starts by rendering beside it and then below it, like how newspaper text would flow around an image.
What clearfix does is to force content after the floats or the container containing the floats to render below it. There are a lot of versions for clear-fix, but it got its name from the version that's commonly being used - the one that uses the CSS property clear
.
Here are several ways to do clearfix , depending on the browser and use case. One only needs to know how to use the clear
property in CSS and how floats render in each browser in order to achieve a perfect cross-browser clear-fix.
Your provided style is a form of clearfix with backwards compatibility. I found an article about this clearfix. It turns out, it's an OLD clearfix - still catering the old browsers. There is a newer, cleaner version of it in the article also. Here's the breakdown:
The first clearfix you have appends an invisible pseudo-element, which is styled clear:both
, between the target element and the next element. This forces the pseudo-element to render below the target, and the next element below the pseudo-element.
The second one appends the style display:inline-block
which is not supported by earlier browsers. inline-block is like inline but gives you some properties that block elements, like width, height as well as vertical padding. This was targeted for IE-MAC.
This was the reapplication of display:block
due to IE-MAC rule above. This rule was "hidden" from IE-MAC.
All in all, these 3 rules keep the .clearfix
working cross-browser, with old browsers in mind.
for mysql 'text':
@Column(columnDefinition = "TEXT")
private String description;
for mysql 'longtext':
@Lob
private String description;
From the threading
module documentation
There is a “main thread” object; this corresponds to the initial thread of control in the Python program. It is not a daemon thread.
There is the possibility that “dummy thread objects” are created. These are thread objects corresponding to “alien threads”, which are threads of control started outside the threading module, such as directly from C code. Dummy thread objects have limited functionality; they are always considered alive and daemonic, and cannot be
join()
ed. They are never deleted, since it is impossible to detect the termination of alien threads.
So, to catch those two cases when you are not interested in keeping a list of the threads you create:
import threading as thrd
def alter_data(data, index):
data[index] *= 2
data = [0, 2, 6, 20]
for i, value in enumerate(data):
thrd.Thread(target=alter_data, args=[data, i]).start()
for thread in thrd.enumerate():
if thread.daemon:
continue
try:
thread.join()
except RuntimeError as err:
if 'cannot join current thread' in err.args[0]:
# catchs main thread
continue
else:
raise
Whereupon:
>>> print(data)
[0, 4, 12, 40]
In WPF an image is typically loaded from a Stream or an Uri.
BitmapImage supports both and an Uri can even be passed as constructor argument:
var uri = new Uri("http://...");
var bitmap = new BitmapImage(uri);
If the image file is located in a local folder, you would have to use a file://
Uri. You could create such a Uri from a path like this:
var path = Path.Combine(Environment.CurrentDirectory, "Bilder", "sas.png");
var uri = new Uri(path);
If the image file is an assembly resource, the Uri must follow the the Pack Uri scheme:
var uri = new Uri("pack://application:,,,/Bilder/sas.png");
In this case the Visual Studio Build Action for sas.png
would have to be Resource
.
Once you have created a BitmapImage
and also have an Image control like in this XAML
<Image Name="image1" />
you would simply assign the BitmapImage to the Source
property of that Image control:
image1.Source = bitmap;
I modified my activate script to source the file .virtualenvrc
, if it exists in the current directory, and to save/restore PYTHONPATH
on activate/deactivate.
You can find the patched activate
script here.. It's a drop-in replacement for the activate script created by virtualenv 1.11.6.
Then I added something like this to my .virtualenvrc
:
export PYTHONPATH="${PYTHONPATH:+$PYTHONPATH:}/some/library/path"
Just add a data attribute
data-html="true"
and you're good to go.
Eg. usage:
<i data-html="true" class="tooltip ficon-help-icon" twipsy-content-set="true" data-original-title= "<b>Hello</b> Stackoverflow" </i>
It has worked in majority of the tooltip plugins i have tried as of now.
I used this (need to run it only once); also make sure you have rights to execute:
from PowerShell with elevated rights:
Set-ExecutionPolicy=RemoteSigned
then from a bat file:
-----------------------------------------
ftype Microsoft.PowerShellScript.1="C:\WINDOWS\system32\windowspowershell\v1.0\powershell.exe" -noexit ^&'%%1'
assoc .ps1=Microsoft.PowerShellScript.1
-----------------------------------------
auto exit: remove -noexit
and voila; double-clicking a *.ps1 will execute it.
With Swift 3, you can choose one of the following ways to solve your problem.
sorted(by:?)
with a Movie
class that does not conform to Comparable
protocolIf your Movie
class does not conform to Comparable
protocol, you must specify in your closure the property on which you wish to use Array's sorted(by:?)
method.
Movie
class declaration:
import Foundation
class Movie: CustomStringConvertible {
let name: String
var date: Date
var description: String { return name }
init(name: String, date: Date = Date()) {
self.name = name
self.date = date
}
}
Usage:
let avatarMovie = Movie(name: "Avatar")
let titanicMovie = Movie(name: "Titanic")
let piranhaMovie = Movie(name: "Piranha II: The Spawning")
let movies = [avatarMovie, titanicMovie, piranhaMovie]
let sortedMovies = movies.sorted(by: { $0.name < $1.name })
// let sortedMovies = movies.sorted { $0.name < $1.name } // also works
print(sortedMovies)
/*
prints: [Avatar, Piranha II: The Spawning, Titanic]
*/
sorted(by:?)
with a Movie
class that conforms to Comparable
protocolHowever, by making your Movie
class conform to Comparable
protocol, you can have a much concise code when you want to use Array's sorted(by:?)
method.
Movie
class declaration:
import Foundation
class Movie: CustomStringConvertible, Comparable {
let name: String
var date: Date
var description: String { return name }
init(name: String, date: Date = Date()) {
self.name = name
self.date = date
}
static func ==(lhs: Movie, rhs: Movie) -> Bool {
return lhs.name == rhs.name
}
static func <(lhs: Movie, rhs: Movie) -> Bool {
return lhs.name < rhs.name
}
}
Usage:
let avatarMovie = Movie(name: "Avatar")
let titanicMovie = Movie(name: "Titanic")
let piranhaMovie = Movie(name: "Piranha II: The Spawning")
let movies = [avatarMovie, titanicMovie, piranhaMovie]
let sortedMovies = movies.sorted(by: { $0 < $1 })
// let sortedMovies = movies.sorted { $0 < $1 } // also works
// let sortedMovies = movies.sorted(by: <) // also works
print(sortedMovies)
/*
prints: [Avatar, Piranha II: The Spawning, Titanic]
*/
sorted()
with a Movie
class that conforms to Comparable
protocolBy making your Movie
class conform to Comparable
protocol, you can use Array's sorted()
method as an alternative to sorted(by:?)
.
Movie
class declaration:
import Foundation
class Movie: CustomStringConvertible, Comparable {
let name: String
var date: Date
var description: String { return name }
init(name: String, date: Date = Date()) {
self.name = name
self.date = date
}
static func ==(lhs: Movie, rhs: Movie) -> Bool {
return lhs.name == rhs.name
}
static func <(lhs: Movie, rhs: Movie) -> Bool {
return lhs.name < rhs.name
}
}
Usage:
let avatarMovie = Movie(name: "Avatar")
let titanicMovie = Movie(name: "Titanic")
let piranhaMovie = Movie(name: "Piranha II: The Spawning")
let movies = [avatarMovie, titanicMovie, piranhaMovie]
let sortedMovies = movies.sorted()
print(sortedMovies)
/*
prints: [Avatar, Piranha II: The Spawning, Titanic]
*/
Well, any specific reason to not make Proxy its own struct?
Anyway you have 2 options:
The proper way, simply move proxy to its own struct, for example:
type Configuration struct {
Val string
Proxy Proxy
}
type Proxy struct {
Address string
Port string
}
func main() {
c := &Configuration{
Val: "test",
Proxy: Proxy{
Address: "addr",
Port: "port",
},
}
fmt.Println(c)
fmt.Println(c.Proxy.Address)
}
The less proper and ugly way but still works:
c := &Configuration{
Val: "test",
Proxy: struct {
Address string
Port string
}{
Address: "addr",
Port: "80",
},
}
Here's yet another way, using pure NumPy, no recursion, no list comprehension, and no explicit for loops. It's about 20% slower than the original answer, and it's based on np.meshgrid.
def cartesian(*arrays):
mesh = np.meshgrid(*arrays) # standard numpy meshgrid
dim = len(mesh) # number of dimensions
elements = mesh[0].size # number of elements, any index will do
flat = np.concatenate(mesh).ravel() # flatten the whole meshgrid
reshape = np.reshape(flat, (dim, elements)).T # reshape and transpose
return reshape
For example,
x = np.arange(3)
a = cartesian(x, x, x, x, x)
print(a)
gives
[[0 0 0 0 0]
[0 0 0 0 1]
[0 0 0 0 2]
...,
[2 2 2 2 0]
[2 2 2 2 1]
[2 2 2 2 2]]
It depends on the implementation of your JSON writer/parser. Microsoft's DataContractJsonSerializer seems to have a hard limit around 8kb (8192 I think), and it will error out for larger strings.
Edit: We were able to resolve the 8K limit for JSON strings by setting the MaxJsonLength property in the web config as described in this answer: https://stackoverflow.com/a/1151993/61569
I had exactly the same problem. I fixed it without rebuilding python, as follows:
Find another server with the same architecture (i386 or x86_64) and the same python version (example: 2.7.5). Yes, this is the hard part. You can try installing python from sources into another server if you can't find any server with the same python version.
In this another server, check if import ssl works. It should work.
If it works, then try to find the _ssl lilbrary as follows:
[root@myserver]# find / -iname _ssl.so
/usr/local/python27/lib/python2.7/lib-dynload/_ssl.so
Copy this file into the original server. Use the same destination folder: /usr/local/python27/lib/python2.7/lib-dynload/
Double check owner and permissions:
[root@myserver]# chown root:root _ssl.so
[root@myserver]# chmod 755 _ssl.so
Now you should be able to import ssl.
This worked for me in a CentOS 6.3 x86_64 environment with python 2.7.3. Also I had python 2.6.6 installed, but with ssl working fine.
Despite Daniel Böhmer's working solution, Ohad Schneider offered a better solution in a comment:
If the file is usually ignored, and you force adding it - it can be accidentally ignored again in the future (like when the file is deleted, then a commit is made and the file is re-created.
You should just un-ignore it in the .gitignore file like that: Unignore subdirectories of ignored directories in Git
You can execute some lines in the same subshell if you end lines with backslash.
cd somedir; \
pwd
The universal tool for string formatting, sprintf
:
$stamp = sprintf('%s%02s', $year, $month);
In Laravel 5.1 I needed a global variable populated with model data accessible in all views.
I followed a similar approach to ollieread's answer and was able to use my variable ($notifications) in any view.
My controller location: /app/Http/Controllers/Controller.php
<?php
namespace App\Http\Controllers;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use App\Models\Main as MainModel;
use View;
abstract class Controller extends BaseController
{
use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
public function __construct() {
$oMainM = new MainModel;
$notifications = $oMainM->get_notifications();
View::share('notifications', $notifications);
}
}
My model location: /app/Models/Main.php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use DB;
class Main extends Model
{
public function get_notifications() {...
It's not magic.
The behavior of this code in C is described in section 6.7.8.21 of the C specification (online draft of C spec): for the elements that don't have a specified value, the compiler initializes pointers to NULL and arithmetic types to zero (and recursively applies this to aggregates).
The behavior of this code in C++ is described in section 8.5.1.7 of the C++ specification (online draft of C++ spec): the compiler aggregate-initializes the elements that don't have a specified value.
Also, note that in C++ (but not C), you can use an empty initializer list, causing the compiler to aggregate-initialize all of the elements of the array:
char array[100] = {};
As for what sort of code the compiler might generate when you do this, take a look at this question: Strange assembly from array 0-initialization
FOMO:
The following example shows apply
and applymap
applied to a DataFrame
.
map
function is something you do apply on Series only. You cannot apply map
on DataFrame.
The thing to remember is that apply
can do anything applymap
can, but apply
has eXtra options.
The X factor options are: axis
and result_type
where result_type
only works when axis=1
(for columns).
df = DataFrame(1, columns=list('abc'),
index=list('1234'))
print(df)
f = lambda x: np.log(x)
print(df.applymap(f)) # apply to the whole dataframe
print(np.log(df)) # applied to the whole dataframe
print(df.applymap(np.sum)) # reducing can be applied for rows only
# apply can take different options (vs. applymap cannot)
print(df.apply(f)) # same as applymap
print(df.apply(sum, axis=1)) # reducing example
print(df.apply(np.log, axis=1)) # cannot reduce
print(df.apply(lambda x: [1, 2, 3], axis=1, result_type='expand')) # expand result
As a sidenote, Series map
function, should not be confused with the Python map
function.
The first one is applied on Series, to map the values, and the second one to every item of an iterable.
Lastly don't confuse the dataframe apply
method with groupby apply
method.
You can also use
select CURDATE()-INTERVAL 30 DAY
I Prefer these one:
Creates Bitmap from InputStream and returns it:
public static Bitmap downloadImage(String url) {
Bitmap bitmap = null;
InputStream stream = null;
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inSampleSize = 1;
try {
stream = getHttpConnection(url);
bitmap = BitmapFactory.decodeStream(stream, null, bmOptions);
stream.close();
}
catch (IOException e1) {
e1.printStackTrace();
System.out.println("downloadImage"+ e1.toString());
}
return bitmap;
}
// Makes HttpURLConnection and returns InputStream
public static InputStream getHttpConnection(String urlString) throws IOException {
InputStream stream = null;
URL url = new URL(urlString);
URLConnection connection = url.openConnection();
try {
HttpURLConnection httpConnection = (HttpURLConnection) connection;
httpConnection.setRequestMethod("GET");
httpConnection.connect();
if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
stream = httpConnection.getInputStream();
}
}
catch (Exception ex) {
ex.printStackTrace();
System.out.println("downloadImage" + ex.toString());
}
return stream;
}
REMEMBER :
Android includes two HTTP clients: HttpURLConnection and Apache HTTP Client. For Gingerbread and later, HttpURLConnection is the best choice.
From Android 3.x Honeycomb or later, you cannot perform Network IO on the UI thread and doing this throws android.os.NetworkOnMainThreadException. You must use Asynctask instead as shown below
/** AsyncTAsk for Image Bitmap */
private class AsyncGettingBitmapFromUrl extends AsyncTask<String, Void, Bitmap> {
@Override
protected Bitmap doInBackground(String... params) {
System.out.println("doInBackground");
Bitmap bitmap = null;
bitmap = AppMethods.downloadImage(params[0]);
return bitmap;
}
@Override
protected void onPostExecute(Bitmap bitmap) {
System.out.println("bitmap" + bitmap);
}
}
Deprecation note:
As per the official Matplotlib guide, usage of thepylab
module is no longer recommended. Please consider using thematplotlib.pyplot
module instead, as described by this other answer.
The following seems to work:
from pylab import rcParams
rcParams['figure.figsize'] = 5, 10
This makes the figure's width 5 inches, and its height 10 inches.
The Figure class then uses this as the default value for one of its arguments.
You can try this:
for file in *.jpg;
do
mv $file $somestring_${file:((-7))}
done
You can see "parameter expansion" in man bash
to understand the above better.
Also make sure the value is not too large or too small for int like in my case.
the above solutions wont work on ipad-2
recently I had an safari browser crash issue while plotting the markers even if there are less number of markers. Initially I was using marker with label (markerwithlabel.js) library for plotting the marker , when i use google native marker it was working fine even with large number of markers but i want customized markers , so i refer the above solution given by jonathan but still the crashing issue is not resolved after doing lot of research i came to know about http://nickjohnson.com/b/google-maps-v3-how-to-quickly-add-many-markers this blog and now my map search is working smoothly on ipad-2 :)
array_key_exists
will definitely tell you if a key exists in an array, whereas isset
will only return true
if the key/variable exists and is not null
.
$a = array('key1' => '????', 'key2' => null);
isset($a['key1']); // true
array_key_exists('key1', $a); // true
isset($a['key2']); // false
array_key_exists('key2', $a); // true
There is another important difference: isset
doesn't complain when $a
does not exist, while array_key_exists
does.
var str = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
str = str.replace(regex, "$11$2");
console.log(str);
Or if you're sure there won't be any other digits in the string:
var str = 'asd-0.testing';
var regex = /\d/;
str = str.replace(regex, "1");
console.log(str);
Basically, ajax request as well as synchronous request sends your document cookies automatically. So, you need to set your cookie to document, not to request. However, your request is cross-domain, and things became more complicated. Basing on this answer, additionally to set document cookie, you should allow its sending to cross-domain environment:
type: "GET",
url: "http://example.com",
cache: false,
// NO setCookies option available, set cookie to document
//setCookies: "lkfh89asdhjahska7al446dfg5kgfbfgdhfdbfgcvbcbc dfskljvdfhpl",
crossDomain: true,
dataType: 'json',
xhrFields: {
withCredentials: true
},
success: function (data) {
alert(data);
});
Does this help?
from datetime import datetime
import calendar
d = datetime.utcnow()
unixtime = calendar.timegm(d.utctimetuple())
print unixtime
Here's an approach. If you pipe through less, the xterm width is set to 80, which ain't so hot. But if you proceed the command with, e.g. COLS=210, you can utilize your expanded xterm.
gitdiff()
{
local width=${COLS:-$(tput cols)}
GIT_EXTERNAL_DIFF="diff -yW$width \$2 \$5; echo >/dev/null" git diff "$@"
}
sc.next().charat(0).........is the method of entering character by user based on the number entered at the run time
example: sc.next().charat(2)------------>>>>>>>>
The problem here seems to be that you're reassigning $today
by assigning a string to it:
$today = $dd+'/'+$mm+'/'+$yyyy;
Strings don't have getDate
.
Also, $today.getDate()-1
just gives you the day of the month minus one; it doesn't give you the full date of 'yesterday'. Try this:
$today = new Date();
$yesterday = new Date($today);
$yesterday.setDate($today.getDate() - 1); //setDate also supports negative values, which cause the month to rollover.
Then just apply the formatting code you wrote:
var $dd = $yesterday.getDate();
var $mm = $yesterday.getMonth()+1; //January is 0!
var $yyyy = $yesterday.getFullYear();
if($dd<10){$dd='0'+$dd} if($mm<10){$mm='0'+$mm} $yesterday = $dd+'/'+$mm+'/'+$yyyy;
Because of the last statement, $yesterday
is now a String
(not a Date
) containing the formatted date.
select name from sysibm.systables
where name like '%ISP%'
and type = 'T'
In a previous project I found that changing from *-imports to specific imports reduced compilation time by half (from about 10 minutes to about 5 minutes). The *-import makes the compiler search each of the packages listed for a class matching the one you used. While this time can be small, it adds up for large projects.
A side affect of the *-import was that developers would copy and paste common import lines rather than think about what they needed.
I cleaned up mido's post and then cleaned up the function that they found. This will either return false
or an array
. When testing remember that you need to collapse the array in the web developer console otherwise it's nonintuitive default behavior may deceive you in to thinking that it is returning an empty array
.
function ip_local()
{
var ip = false;
window.RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection || false;
if (window.RTCPeerConnection)
{
ip = [];
var pc = new RTCPeerConnection({iceServers:[]}), noop = function(){};
pc.createDataChannel('');
pc.createOffer(pc.setLocalDescription.bind(pc), noop);
pc.onicecandidate = function(event)
{
if (event && event.candidate && event.candidate.candidate)
{
var s = event.candidate.candidate.split('\n');
ip.push(s[0].split(' ')[4]);
}
}
}
return ip;
}
Additionally please keep in mind folks that this isn't something old-new like CSS border-radius
though one of those bits that is outright not supported by IE11 and older. Always use object detection, test in reasonably older browsers (e.g. Firefox 4, IE9, Opera 12.1) and make sure your newer scripts aren't breaking your newer bits of code. Additionally always detect standards compliant code first so if there is something with say a CSS prefix detect the standard non-prefixed code first and then fall back as in the long term support will eventually be standardized for the rest of it's existence.
Use TextAreaFor
@Html.TextAreaFor(model => model.Description, new { @class = "whatever-class", @cols = 80, @rows = 10 })
or use style for multi-line
class.
You could also write EditorTemplate for this.
You are trying to instantiate an interface, you need to give the concrete class that you want to use i.e. Queue<Edge> theQueue = new LinkedBlockingQueue<Edge>();
.
I had same problem, but I think I have simple solution(code is from my RoR app): Extract industry ids from yahoo.finance.sectors and add it to db:
select = "select * from yahoo.finance.sectors"
generate_query select
@data.each do |data|
data["industry"].each do |ind|
unless ind.kind_of?(Array)
unless ind["id"].nil?
id = ind["id"].to_i
if id > 0
Industry.where(id: id).first_or_create(name: ind["name"]).update_attribute(:name, ind["name"])
end
end
end
end
end
Extract all comanies with their symbols with industry ids:
ids = Industry.all.map{|ind| "'#{ind.id.to_s}'" }.join(",")
select = "select * from yahoo.finance.industry where id in"
generate_query select, ids
@data.each do |ts|
unless ts.kind_of?(Array) || ts["company"].nil?
if ts["company"].count == 2 && ts["company"].first[0] == "name"
t = ts["company"]
Ticket.find_or_create_by_symbol(symbol: t["symbol"], name: t["name"] ).update_attribute(:name, t["name"])
else
ts["company"].each do |t|
Ticket.find_or_create_by_symbol(symbol: t["symbol"], name: t["name"] ).update_attribute(:name, t["name"])
end
end
end
end
end
Connection hellper:
def generate_query(select, ids = nil)
if params[:form] || params[:action] == "sectors" || params[:controller] == "tickets"
if params[:action] == "sectors" || params[:controller] == "tickets"
if ids.nil?
query= select
else
query= "#{select} (#{ids})"
end
else
if params[:form][:ids]
@conditions = params_parse params[:form][:ids]
query = "#{select} (#{@conditions})"
end
end
yql_execut(query)
end
end
def yql_execut(query)
# TODO: OAuth ACCESS (http://developer.yahoo.com/yql/guide/authorization.html)
base_url = "http://query.yahooapis.com/v1/public/yql?&format=json&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys&q="
dirty_data = JSON.parse(HTTParty.get(base_url + URI.encode(query)).body)
if dirty_data["query"]["results"] == nil
@data, @count, @table_head = nil
else
@data = dirty_data["query"]["results"].to_a[0][1].to_a
@count = dirty_data["query"]["count"]
if @count == 1
@table_head = @data.map{|h| h[0].capitalize}
else
@table_head = @data.to_a.first.to_a.map{|h| h[0].capitalize}
end
end
end
Sorry for mess, but this is first testing version for my project and I needed it very fast. There are some helpers variabels and other things for my app, sorry for it. But I have question: Have many symbols do you have? I have 5500.
The key point was "HARD TAB" 1. Check whether you used TAB instead of whitespace 2. Check your .vimrc for "set tabstop=X"
There are several tools which can import Excel to SQL Server.
I am using DbTransfer (http://www.dbtransfer.com/Products/DbTransfer) to do the job. It's primarily focused on transfering data between databases and excel, xml, etc...
I have tried the openrowset method and the SQL Server Import / Export Assitant before. But I found these methods to be unnecessary complicated and error prone in constrast to doing it with one of the available dedicated tools.
On Mac OS, I found the best solution here. Quoting the author, two simple steps are:
1) Open Terminal and do the following:
export http_proxy=http://staff-proxy.ul.ie:8080
export HTTP_PROXY=http://staff-proxy.ul.ie:8080
2) Run R and do the following:
Sys.setenv(http_proxy="http://staff-proxy.ul.ie:8080")
double-check this with:
Sys.getenv("http_proxy")
I am behind university proxy, and this solution worked perfectly. The major issue is to export the items in Terminal before running R, both in upper- and lower-case.
For anyone who comes here, as I did, looking for the syntax to change origin to a different location you can find that documentation here: https://help.github.com/articles/changing-a-remote-s-url/. Using git remote add
to do this will result in "fatal: remote origin already exists."
Nutshell:
git remote set-url origin https://github.com/username/repo
(The marked answer is correct, I'm just hoping to help anyone as lost as I was... haha)
I added the DOCTYPE
directive you see here:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [
<!ENTITY nl "
">
]>
<xsl:stylesheet xmlns:x="http://www.w3.org/2005/02/query-test-XQTSCatalog"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="2.0">
This allows me to use &nl;
instead of 

to produce a newline in the output. Like other solutions, this is typically placed inside a <xsl:text>
tag.
You were on the right track. IrfanView sets the background for transparency the same as the viewing color around the image.
You just need to re-open the image with IrfanView after changing the view color to white.
To change the viewing color in Irfanview go to:
Options > Properties/Settings > Viewing > Main window color
public class Itemfound{
public static void main(String args[]){
if( Arrays.asList("a","b","c").contains("a"){
System.out.println("It is here");
}
}
}
This is what you looking for. The contains() method simply checks the index of element in the list. If the index is greater than '0' than element is present in the list.
public boolean contains(Object o) {
return indexOf(o) >= 0;
}
Cell A1 = find/the/position/of/the last slash
simple way to do it is reverse the text and then find the first slash as normal. Now you can get the length of the full text minus this number.
Like so:
=LEN(A1)-FIND("/",REVERSETEXT(A1),1)+1
This returns 21, the position of the last /
you can use more than one useEffect
for example if my variable is data1 i can use all of this in my component
useEffect( () => console.log("mount"), [] );
useEffect( () => console.log("will update data1"), [ data1 ] );
useEffect( () => console.log("will update any") );
useEffect( () => () => console.log("will update data1 or unmount"), [ data1 ] );
useEffect( () => () => console.log("unmount"), [] );
I find letter identifiers to be more readable and more indicative of parsed type:
1 - 7f / 10
1 - 7 / 10f
or:
1 - 7d / 10
1 - 7 / 10d
NodeList.prototype.forEach = Array.prototype.forEach;
Now you can do document.querySelectorAll('div').forEach(function()...)
I had this problem in an abstract generic class. In this particular case, the solution is simpler:
abstract class Foo<T> {
abstract Class<T> getTClass();
//...
}
and later on the derived class:
class Bar extends Foo<Whatever> {
@Override
Class<T> getTClass() {
return Whatever.class;
}
}
This works :) (I hope multi-browser, Firefox likes it)
li { display: inline; list-style-type: none; }_x000D_
li:after { content: ", "; }_x000D_
li:last-child:before { content: "and "; }_x000D_
li:last-child:after { content: "."; }
_x000D_
<html>_x000D_
<body>_x000D_
<ul>_x000D_
<li>One</li>_x000D_
<li>Two</li>_x000D_
<li>Three</li>_x000D_
</ul>_x000D_
</body>_x000D_
</html>
_x000D_
I thought this could be solved by telling git that the file exists, rather than committing all of the contents of it to the staging area, and then call git stash
. Araqnid describes how to do the former.
git add --intent-to-add path/to/untracked-file
or
git update-index --add --cacheinfo 100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 path/to/untracked-file
However, the latter doesn't work:
$ git stash
b.rb: not added yet
fatal: git-write-tree: error building trees
Cannot save the current index state
I needed to achieve the same results, but using something more generic (as the type was not known). Thanks to marc's answer I finally figured out what I was trying to achieve:
public static LambdaExpression CombineOr(Type sourceType, LambdaExpression exp, LambdaExpression newExp)
{
var parameter = Expression.Parameter(sourceType);
var leftVisitor = new ReplaceExpressionVisitor(exp.Parameters[0], parameter);
var left = leftVisitor.Visit(exp.Body);
var rightVisitor = new ReplaceExpressionVisitor(newExp.Parameters[0], parameter);
var right = rightVisitor.Visit(newExp.Body);
var delegateType = typeof(Func<,>).MakeGenericType(sourceType, typeof(bool));
return Expression.Lambda(delegateType, Expression.Or(left, right), parameter);
}
In [9]: pd.Series(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %timeit pd.Series(df.A.values,index=df.B).to_dict()
1000 loops, best of 3: 987 us per loop
If you have the table definition to have an IDENTITY column e.g. IDENTITY(1,1) then don't include MyId in your INSERT INTO statement. The point of IDENTITY is it gives it the next unused value as the primary key value.
insert into MYDB.dbo.MainTable (MyFirstName, MyLastName, MyAddress, MyPort)
values(@myFirstName, @myLastName, @myAddress, @myPort)
There is then no need to pass the @MyId parameter into your stored procedure either. So change it to:
CREATE PROCEDURE [dbo].[sp_Test]
@myFirstName nvarchar(50)
,@myLastName nvarchar(50)
,@myAddress nvarchar(MAX)
,@myPort int
AS
If you want to know what the ID of the newly inserted record is add
SELECT @@IDENTITY
to the end of your procedure. e.g. http://msdn.microsoft.com/en-us/library/ms187342.aspx
You will then be able to pick this up in which ever way you are calling it be it SQL or .NET.
P.s. a better way to show you table definision would have been to script the table and paste the text into your stackoverflow browser window because your screen shot is missing the column properties part where IDENTITY is set via the GUI. To do that right click the table 'Script Table as' --> 'CREATE to' --> Clipboard. You can also do File or New Query Editor Window (all self explanitory) experient and see what you get.
There is better way. I'm using it in pages where I'm using kendo angularJS directives and grids has'nt IDs...
change: function (e) {
var selectedDataItem = e != null ? e.sender.dataItem(e.sender.select()) : null;
}
JButton b3 = new JButton("CLOSE");
b3.setBounds(50, 375, 250, 50);
b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
Here is an another way to parse json object into Html table
//EXTRACT VALUE FOR HTML HEADER._x000D_
// ('Book ID', 'Book Name', 'Category' and 'Price')_x000D_
var col = [];_x000D_
_x000D_
for (var i = 0; i < d.length; i++) {_x000D_
for (var key in d[i]) {_x000D_
if (col.indexOf(key) === -1) {_x000D_
col.push(key);_x000D_
}_x000D_
}_x000D_
}_x000D_
_x000D_
// CREATE DYNAMIC TABLE._x000D_
var table = document.createElement("table");_x000D_
_x000D_
// CREATE HTML TABLE HEADER ROW USING THE EXTRACTED HEADERS ABOVE._x000D_
var tr = table.insertRow(-1); // TABLE ROW. _x000D_
_x000D_
for (var i = 0; i < col.length; i++) {_x000D_
var th = document.createElement("th");// TABLE HEADER._x000D_
th.innerHTML = col[i];_x000D_
tr.appendChild(th);_x000D_
}_x000D_
_x000D_
// ADD JSON DATA TO THE TABLE AS ROWS._x000D_
for (var i = 0; i < d.length; i++) {_x000D_
tr = table.insertRow(-1);_x000D_
_x000D_
for (var j = 0; j < col.length; j++) {_x000D_
var tabCell = tr.insertCell(-1);_x000D_
tabCell.innerHTML = d[i][col[j]];_x000D_
}_x000D_
}_x000D_
_x000D_
// FINALLY ADD THE NEWLY CREATED TABLE WITH JSON DATA TO A CONTAINER._x000D_
var divContainer = document.getElementById("showData");_x000D_
divContainer.innerHTML = "";_x000D_
divContainer.appendChild(table);
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
_x000D_
rem Set your own path.
set TOOL_ROOT=d:\Tools\TortoiseSVN-1.6.13.20954-win32-svn-1.6.16\tortoisesvn_1.6.16.21511
set PACKAGENAME=TortoiseSVN-1.6.16.21511-x64-svn-1.6.17.msi
set TOOL_INSTALLROOT="c:\Program Files (x86)\TortoiseSVN"
msiexec /i "%TOOL_ROOT%\%PACKAGENAME%" INSTALLDIR=%TOOL_INSTALLROOT% ALLUSERS=1 ARPSYSTEMCOMPONENT=1 RebootYesNo=No REBOOT=ReallySupress /qb-
set ret=%ERRORLEVEL%
rem The installer seems to return same values as MSI
rem These codes mean that the product is properly installed, even though the code is not zero.
rem 1641 ERROR_SUCCESS_REBOOT_INITIATED
rem 3010 ERROR_SUCCESS_REBOOT_REQUIRED
if %ret% EQU 1641 set ret=0
if %ret% EQU 3010 set ret=0
if %ret% GTR 0 exit %ret%
Change the GetXxx API method to return HttpResponseMessage and then return a typed version for the full response and the untyped version for the NotModified response.
public HttpResponseMessage GetComputingDevice(string id)
{
ComputingDevice computingDevice =
_db.Devices.OfType<ComputingDevice>()
.SingleOrDefault(c => c.AssetId == id);
if (computingDevice == null)
{
return this.Request.CreateResponse(HttpStatusCode.NotFound);
}
if (this.Request.ClientHasStaleData(computingDevice.ModifiedDate))
{
return this.Request.CreateResponse<ComputingDevice>(
HttpStatusCode.OK, computingDevice);
}
else
{
return this.Request.CreateResponse(HttpStatusCode.NotModified);
}
}
*The ClientHasStale data is my extension for checking ETag and IfModifiedSince headers.
The MVC framework should still serialize and return your object.
NOTE
I think the generic version is being removed in some future version of the Web API.
True is only valid if you're using the .NET SqlClient library. It isn't valid when using OLEDB. Where SSPI is bvaid in both either you are using .net SqlClient library or OLEDB.
Usually when you want multidimensional arrays you don't want a list of lists, but rather a numpy array or possibly a dict.
For example, with numpy you would do something like
import numpy
a = numpy.empty((10, 10))
a.fill(foo)
If you want it outside of loop then use the below code.
<?php
$author_id = get_post_field ('post_author', $cause_id);
$display_name = get_the_author_meta( 'display_name' , $author_id );
echo $display_name;
?>
In C# and VB the SqlCommand object implements the Parameter.AddWithValue method which handles this situation
Find the current path of your global node package installation by following command.
npm list -g --depth=0
Change this path to correct path by following command.
npm set prefix C:\Users\username(Number)\AppData\Roaming\npm\node_modules
It worked for me. Read my previous answer for better understanding.
Using COUNT instead of SUM removes the requirement for an ELSE statement:
SELECT jobId, jobName,
COUNT(CASE WHEN Priority=1 THEN 1 END) AS Priority1,
COUNT(CASE WHEN Priority=2 THEN 1 END) AS Priority2,
COUNT(CASE WHEN Priority=3 THEN 1 END) AS Priority3,
COUNT(CASE WHEN Priority=4 THEN 1 END) AS Priority4,
COUNT(CASE WHEN Priority=5 THEN 1 END) AS Priority5
FROM TableName
GROUP BY jobId, jobName
For anyone who encounters this issue on Windows i couldn't find my answer on google at all. I just tried running composer require ext-curl and this worked. Alternatively add the following in your composer.json file:
"require": {
"ext-curl": "^7.3"
}
I use this, if you want only one view to be bring to front when needed:
containerView.bringChildToFront(topView);
containerView is container of views to be sorted, topView is view which i want to have as top most in container.
for multiple views to arrange is about to use setChildrenDrawingOrderEnabled(true) and overriding getChildDrawingOrder(int childCount, int i) as mentioned above.
Without doing this %config IPCompleter.greedy=True
after you import a package like numpy or pandas in this way;
import numpy as np
import pandas as pd
.
Then you type in pd.
then tap the tab button it brings out all the possible methods to use very easy and straight forward.
Cookies are passed as HTTP headers, both in the request (client -> server), and in the response (server -> client).
Regex rx = new Regex(@"^0+(\d+)$");
rx.Replace("0001234", @"$1"); // => "1234"
rx.Replace("0001234000", @"$1"); // => "1234000"
rx.Replace("000", @"$1"); // => "0" (TrimStart will convert this to "")
// usage
var outString = rx.Replace(inputString, @"$1");
Consider the easy, lightweight Java library EasyFlow. From their docs:
With EasyFlow you can:
- implement complex logic but keep your code simple and clean
- handle asynchronous calls with ease and elegance
- avoid concurrency by using event-driven programming approach
- avoid StackOverflow error by avoiding recursion
- simplify design, programming and testing of complex java applications
I wrote jaguarDb to handle some of the things that you are mentioning since I sometimes need a "little" database for demo or test projects too and I don't want to depend on mongoDB or another real database.
I don't believe the expression is sensical as it is.
Elvis means "if truthy, use the value, else use this other thing."
Your "other thing" is a closure, and the value is status != null
, neither of which would seem to be what you want. If status
is null, Elvis says true
. If it's not, you get an extra layer of closure.
Why can't you just use:
(it.description == desc) && ((status == null) || (it.status == status))
Even if that didn't work, all you need is the closure to return the appropriate value, right? There's no need to create two separate find
calls, just use an intermediate variable.
There are numerous methods of accomplishing this, which I'll detail with a few examples below.
img.grayscale {
filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 3.5+ */
filter: gray; /* IE6-9 */
-webkit-filter: grayscale(100%); /* Chrome 19+ & Safari 6+ */
}
img.grayscale:hover {
filter: none;
-webkit-filter: grayscale(0%);
}
img.grayscale {_x000D_
filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");_x000D_
/* Firefox 3.5+, IE10 */_x000D_
filter: gray;_x000D_
/* IE6-9 */_x000D_
-webkit-filter: grayscale(100%);_x000D_
/* Chrome 19+ & Safari 6+ */_x000D_
-webkit-transition: all .6s ease;_x000D_
/* Fade to color for Chrome and Safari */_x000D_
-webkit-backface-visibility: hidden;_x000D_
/* Fix for transition flickering */_x000D_
}_x000D_
_x000D_
img.grayscale:hover {_x000D_
filter: none;_x000D_
-webkit-filter: grayscale(0%);_x000D_
}_x000D_
_x000D_
svg {_x000D_
background: url(http://4.bp.blogspot.com/-IzPWLqY4gJ0/T01CPzNb1KI/AAAAAAAACgA/_8uyj68QhFE/s400/a2cf7051-5952-4b39-aca3-4481976cb242.jpg);_x000D_
}_x000D_
_x000D_
svg image {_x000D_
transition: all .6s ease;_x000D_
}_x000D_
_x000D_
svg image:hover {_x000D_
opacity: 0;_x000D_
}
_x000D_
<p>Firefox, Chrome, Safari, IE6-9</p>_x000D_
<img class="grayscale" src="http://4.bp.blogspot.com/-IzPWLqY4gJ0/T01CPzNb1KI/AAAAAAAACgA/_8uyj68QhFE/s1600/a2cf7051-5952-4b39-aca3-4481976cb242.jpg" width="400">_x000D_
<p>IE10 with inline SVG</p>_x000D_
<svg xmlns="http://www.w3.org/2000/svg" id="svgroot" viewBox="0 0 400 377" width="400" height="377">_x000D_
<defs>_x000D_
<filter id="filtersPicture">_x000D_
<feComposite result="inputTo_38" in="SourceGraphic" in2="SourceGraphic" operator="arithmetic" k1="0" k2="1" k3="0" k4="0" />_x000D_
<feColorMatrix id="filter_38" type="saturate" values="0" data-filterid="38" />_x000D_
</filter>_x000D_
</defs>_x000D_
<image filter="url("#filtersPicture")" x="0" y="0" width="400" height="377" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://4.bp.blogspot.com/-IzPWLqY4gJ0/T01CPzNb1KI/AAAAAAAACgA/_8uyj68QhFE/s1600/a2cf7051-5952-4b39-aca3-4481976cb242.jpg" />_x000D_
</svg>
_x000D_
You can find an article related to this technique here.
This approach requires two copies of an image: one in grayscale and the other in full color. Using the CSS :hover
psuedoselector, you can update the background of your element to toggle between the two:
#yourimage {
background: url(../grayscale-image.png);
}
#yourImage:hover {
background: url(../color-image.png};
}
#google {_x000D_
background: url('http://www.google.com/logos/keystroke10-hp.png');_x000D_
height: 95px;_x000D_
width: 275px;_x000D_
display: block;_x000D_
/* Optional for a gradual animation effect */_x000D_
transition: 0.5s;_x000D_
}_x000D_
_x000D_
#google:hover {_x000D_
background: url('https://graphics217b.files.wordpress.com/2011/02/logo1w.png');_x000D_
}
_x000D_
<a id='google' href='http://www.google.com'></a>
_x000D_
This could also be accomplished by using a Javascript-based hover effect such as jQuery's hover()
function in the same manner.
The desaturate library is a common library that allows you to easily switch between a grayscale version and full-colored version of a given element or image.
well after spending about 10 days trying to solve this issue, i finally figured it out today and decide to post the solution
in the start menu, type RUN, open it the in the run box, type SERVICES.MSC, click okay
ensure that these two services are started SQL Server(MSSQLSERVER) SQL Server Vss writer
Relationships in JPA are always unidirectional, unless you associate the parent with the child in both directions. Cascading REMOVE operations from the parent to the child will require a relation from the parent to the child (not just the opposite).
You'll therefore need to do this:
@ManyToOne
relationship to a bi-directional @ManyToOne
, or a unidirectional @OneToMany
. You can then cascade REMOVE operations so that EntityManager.remove
will remove the parent and the children. You can also specify orphanRemoval
as true, to delete any orphaned children when the child entity in the parent collection is set to null, i.e. remove the child when it is not present in any parent's collection.ON DELETE CASCADE
. You'll need to invoke EntityManager.clear()
after calling EntityManager.remove(parent)
as the persistence context needs to be refreshed - the child entities are not supposed to exist in the persistence context after they've been deleted in the database.you didn't complete your try
statement. You need and except
in there too.
For installing mysql-shell
with homebrew, run
brew cask install mysql-shell
you can then launch the mysql shell with
mysqlsh
if you want to enter SQL mode directly, run
mysqlsh --sql
I would use this:
$parts = explode('-', '2068-06-15');
echo $parts[0];
It appears the date is coming from a source where it is always the same, much quicker this way using explode.
This should also work.
this.ViewData.Add("index", index);
Html.RenderPartial(
"ProductImageForm",
image,
this.ViewData
);
There is, indeed, prevision for such feature, look http://www.w3.org/TR/css3-values/#attr-notation
This fiddle should work like what you need, but will not for now.
Unfortunately, it's still a draft, and isn't fully implemented on major browsers.
It does work for content
on pseudo-elements, though.
An alternative way to go around the problem, is to make the name of the session cookie be port related. For example:
Your code could access the webserver configuration to find out which port your server uses, and name the cookie accordingly.
Keep in mind that your application will receive both cookies, and you need to request the one that corresponds to your port.
There is no need to have the exact port number in the cookie name, but this is more convenient.
In general, the cookie name could encode any other parameter specific to the server instance you use, so it can be decoded by the right context.
See Timer Objects from threading.
How about
from threading import Timer
def timeout():
print("Game over")
# duration is in seconds
t = Timer(20 * 60, timeout)
t.start()
# wait for time completion
t.join()
Should you want pass arguments to the timeout
function, you can give them in the timer constructor:
def timeout(foo, bar=None):
print('The arguments were: foo: {}, bar: {}'.format(foo, bar))
t = Timer(20 * 60, timeout, args=['something'], kwargs={'bar': 'else'})
Or you can use functools.partial
to create a bound function, or you can pass in an instance-bound method.
When I was first learning Java we had to make Yahtzee and I thought it would be cool to create custom Swing components and containers instead of just drawing everything on one JPanel
. The benefit of extending Swing
components, of course, is to have the ability to add support for keyboard shortcuts and other accessibility features that you can't do just by having a paint()
method print a pretty picture. It may not be done the best way however, but it may be a good starting point for you.
Edit 8/6 - If it wasn't apparent from the images, each Die is a button you can click. This will move it to the DiceContainer
below. Looking at the source code you can see that each Die button is drawn dynamically, based on its value.
Here are the basic steps:
JComponent
super()
in your constructorsMouseListener
Put this in the constructor:
enableInputMethods(true);
addMouseListener(this);
Override these methods:
public Dimension getPreferredSize()
public Dimension getMinimumSize()
public Dimension getMaximumSize()
Override this method:
public void paintComponent(Graphics g)
The amount of space you have to work with when drawing your button is defined by getPreferredSize()
, assuming getMinimumSize()
and getMaximumSize()
return the same value. I haven't experimented too much with this but, depending on the layout you use for your GUI your button could look completely different.
And finally, the source code. In case I missed anything.
Did you try passwd -d root
? Most likely, this will do what you want.
You can also manually edit /etc/shadow
: (Create a backup copy. Be sure that you can log even if you mess up, for example from a rescue system.) Search for "root". Typically, the root entry looks similar to
root:$X$SK5xfLB1ZW:0:0...
There, delete the second field (everything between the first and second colon):
root::0:0...
Some systems will make you put an asterisk (*) in the password field instead of blank, where a blank field would allow no password (CentOS 8 for example)
root:*:0:0...
Save the file, and try logging in as root. It should skip the password prompt. (Like passwd -d
, this is a "no password" solution. If you are really looking for a "blank password", that is "ask for a password, but accept if the user just presses Enter", look at the manpage of mkpasswd
, and use mkpasswd
to create the second field for the /etc/shadow.)
{{widget.title}}
Try this it will work
try - Add sensitive code catch - to handle exception finally - always executed whether exception caught or not. Associated with try -catch. Used to close the resource which we opened in try block throw - To handover our created exception to JVM manually. Used to throw customized exception throws - To delegate the responsibility of exception handling to caller method or main method.
Add the following aliases. I think these should be made available in PowerShell by default:
function not-exist { -not (Test-Path $args) }
Set-Alias !exist not-exist -Option "Constant, AllScope"
Set-Alias exist Test-Path -Option "Constant, AllScope"
With that, the conditional statements will change to:
if (exist $path) { ... }
and
if (not-exist $path) { ... }
if (!exist $path) { ... }
For synchronous approach
const fs = require('fs')
fs.writeFileSync('file.json', JSON.stringify(jsonVariable));
ienumerable:when we want to deal with inprocess memory, i.e without dataconnection iqueryable:when to deal with sql server, i.e with data connection ilist : operations like add object, delete object etc
Just add the height you want with CSS, example:
.card{
height: 350px;
}
You will have to add your own CSS.
If you check the documentation, this is for Masonry style - the point of that is they are not all the same height.
You can use recode from the car package:
library(ggplot2) #get data
library(car)
daimons$new_var <- recode(diamonds$clarity , "'I1' = 'low';'SI2' = 'low';else = 'high';")[1:10]
If your class inherits from Thread, you can use methods getName
and setName
to name each thread. Otherwise you could just add a name
field to MyTask
, and initialize it in your constructor.
Hey this is pretty simple to solve this error.Just follow this steps:
First uninstall any existing installation:
pip uninstall scikit-image
or, on conda-based systems:
conda uninstall scikit-image
Now, clone scikit-image on your local computer, and install:
git clone https://github.com/scikit-image/scikit-image.git
cd scikit-image
pip install -e .
To update the installation:
git pull # Grab latest source
pip install -e . # Reinstall
For other os and manual process please check this Link.
This is a problem related permission. Make sure that the current user has access to the folder which contains installation files.
location / {
if ($http_host !~ "^www.domain.com"){
rewrite ^(.*)$ $scheme://www.domain.com/$1 redirect;
}
}
You can use subList(int fromIndex, int toIndex)
method on your integers arr, something like this:
import java.util.ArrayList;
import java.util.List;
public class Main {
public static void main(String[] args) {
List<Integer> arr = new ArrayList<>();
arr.add(1);
arr.add(2);
arr.add(3);
arr.add(4);
List<Integer> partialArr = arr.subList(1, 3);
// print the subArr
for (Integer i: partialArr)
System.out.println(i + " ");
}
}
Output will be: 2 3
.
Note that subList(int fromIndex, int toIndex)
method performs minus 1 on the 2nd variable it receives (var2 - 1), i don't know exactly why, but that's what happens, maybe to reduce the chance of exceeding the size of the array.
directories=[d for d in os.listdir(os.getcwd()) if os.path.isdir(d)]
I had a similar issue where I wanted to represent HTML as JSON in the following way:
string
Example:
<div>
<span>text</span>Text2
</div>
becomes
[
'div',
{},
['span', {}, 'text'],
'Text2'
]
I wrote a function which handles transforming a DOM Element into this kind of JS structure. You can find this function at the end of this answer. The function is written in Typescript. You can use the Typescript playground to convert it to clean JavaScript.
Furthermore, if you need to parse an html string into DOM, assign to .innerHtml
:
let element = document.createElement('div')
element.innerHtml = htmlString
Also, this one is common knowledge but if you need a JSON string output, use JSON.stringify
.
/**
* A NodeDescriptor stands for either an (HTML) Element, or for a text node
*/
export type NodeDescriptor = ElementDescriptor | string
/**
* Array representing an HTML Element. It consists of:
*
* - The (tag) name of the element
* - An object, mapping attribute keys to attribute values
* - The (inlined) list of children nodes
*/
export type ElementDescriptor = [
string,
Record<string, string>,
...NodeDescriptor[]
]
export let htmlToJs = (element: Element, trim = true): ElementDescriptor => {
let convertElement = (element: Element): ElementDescriptor => {
let attributeObject: Record<string, string> = {}
for (let { name, value } of element.attributes) {
attributeObject[name] = value
}
let childArray: NodeDescriptor[] = []
for (let node of element.childNodes) {
let converter = htmlToJsDispatch[node.nodeType]
if (converter) {
let descriptor = converter(node as any)
let skip = false
if (trim && typeof descriptor === 'string') {
descriptor = descriptor.trim()
if (descriptor === '') skip = true
}
if (!skip) childArray.push(descriptor)
}
}
return [element.tagName.toLowerCase(), attributeObject, ...childArray]
}
let htmlToJsDispatch = {
[element.ELEMENT_NODE]: convertElement,
[element.TEXT_NODE]: (node: Text): string => node.data,
}
return convertElement(element)
}
The method you are trying to use checks if the button is active:
btnAdd.isEnabled()
When enabled, any component associated with this object is active and able to fire this object's actionPerformed method.
This method does not check if the button is pressed.
If i understand your question correctly, you want to disable your "Add" button after the user clicks "Check out".
Try disabling your button at start: btnAdd.setEnabled(false)
or after the user presses "Check out"
I like the following:
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Demo:
import time
for i in range(100):
time.sleep(0.1)
print 'Downloading File FooFile.txt [%d%%]\r'%i,
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
Demo:
import time
for i in range(100):
time.sleep(0.1)
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
# On PyCharm Debugger console, \r needs to come before the text.
# Otherwise, the text may not appear at all, or appear inconsistently.
# tested on PyCharm 2019.3, Python 3.6
import time
print('Start.')
for i in range(100):
time.sleep(0.02)
print('\rDownloading File FooFile.txt [%d%%]'%i, end="")
print('\nDone.')
Unless you can get PHP to label that element with a class you are better to use jQuery.
jQuery(document).ready(function () {
$count = jQuery("ul li").size() - 1;
alert($count);
jQuery("ul li:nth-child("+$count+")").css("color","red");
});
For a Node.js app, in the server.js file before registering all of my own routes, I put the code below. It sets the headers for all responses. It also ends the response gracefully if it is a pre-flight "OPTIONS" call and immediately sends the pre-flight response back to the client without "nexting" (is that a word?) down through the actual business logic routes. Here is my server.js file. Relevant sections highlighted for Stackoverflow use.
// server.js
// ==================
// BASE SETUP
// import the packages we need
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var morgan = require('morgan');
var jwt = require('jsonwebtoken'); // used to create, sign, and verify tokens
// ====================================================
// configure app to use bodyParser()
// this will let us get the data from a POST
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
// Logger
app.use(morgan('dev'));
// -------------------------------------------------------------
// STACKOVERFLOW -- PAY ATTENTION TO THIS NEXT SECTION !!!!!
// -------------------------------------------------------------
//Set CORS header and intercept "OPTIONS" preflight call from AngularJS
var allowCrossDomain = function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
res.header('Access-Control-Allow-Headers', 'Content-Type');
if (req.method === "OPTIONS")
res.send(200);
else
next();
}
// -------------------------------------------------------------
// STACKOVERFLOW -- END OF THIS SECTION, ONE MORE SECTION BELOW
// -------------------------------------------------------------
// =================================================
// ROUTES FOR OUR API
var route1 = require("./routes/route1");
var route2 = require("./routes/route2");
var error404 = require("./routes/error404");
// ======================================================
// REGISTER OUR ROUTES with app
// -------------------------------------------------------------
// STACKOVERFLOW -- PAY ATTENTION TO THIS NEXT SECTION !!!!!
// -------------------------------------------------------------
app.use(allowCrossDomain);
// -------------------------------------------------------------
// STACKOVERFLOW -- OK THAT IS THE LAST THING.
// -------------------------------------------------------------
app.use("/api/v1/route1/", route1);
app.use("/api/v1/route2/", route2);
app.use('/', error404);
// =================
// START THE SERVER
var port = process.env.PORT || 8080; // set our port
app.listen(port);
console.log('API Active on port ' + port);
I had done all the above solutions but it did not work.
My default page wasn't an aspx page, it was an html page.
This article solved the problem. https://weblog.west-wind.com/posts/2013/aug/15/iis-default-documents-vs-aspnet-mvc-routes
Basically, in my \App_Start\RouteConfig.cs file, I had to add a line:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.IgnoreRoute(""); // This was the line I had to add here!
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
Hope this helps someone, it took me a goodly while to find the answer.
If like me, you got that message after installing jenv,
simply add netbeans_jdkhome="$JAVA_HOME"
to your [netbeans-installation-directory]/etc/netbeans.conf
file
Taken from the css3mediaqueries.js project page.
Note: Doesn't work on @import'ed stylesheets (which you shouldn't use anyway for performance reasons). Also won't listen to the media attribute of the <link>
and <style>
elements.
As much as I love XAML, for this kinds of tasks I switch to code behind. Attached behaviors are a good pattern for this. Keep in mind, Expression Blend 3 provides a standard way to program and use behaviors. There are a few existing ones on the Expression Community Site.
To check for network provider you just need to change the string passed to isProviderEnabled to LocationManager.NETWORK_PROVIDER if you check the return values for both GPS provider and NETwork provider - both false means no location services
If you have even the relative pathname (in this case it appears to be ./
) you can open files relative to your script file(s). I use Perl, but the same general solution can apply: I split the directory into an array of folders, then pop
off the last element (the script), then push
(or for you, append
) on whatever I want, and then join them together again, and BAM! I have a working pathname that points to exactly where I expect it to point, relative or absolute.
Of course, there are better solutions, as posted. I just kind of like mine.
Since the version 22.1.0, the class ActionBarActivity
is deprecated. You should use AppCompatActivity
.
In platforms like Java, int
s are primitives while Integer
is an object which holds a integer field. The important distinction is that primitives are always passed around by value and by definition are immutable.
Any operation involving a primitive variable always returns a new value. On the other hand, objects are passed around by reference. One could argue that the point to the object (AKA the reference) is also being passed around by value, but the contents are not.
button:hover is just when you move the cursor over the button.
Try button:active instead...will work for other elements as well
button:active{_x000D_
color: red;_x000D_
}
_x000D_
var units = ["", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
var tens = ["", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"];
function convert7digitIntoWords(num) {
var remainder = num % 1000000
var hun = num - remainder;
var div = Math.floor(num / 100000);
if (remainder !== 0)
return (convert2digitIntoWords(div) + " lakhs " + convert5digitIntoWords(remainder % 100000))
else
return (convert2digitIntoWords(div) + " lakhs ")
}
function convert6digitIntoWords(num) {
var remainder = num % 100000
var hun = num - remainder;
var div = Math.floor(num / 100000);
if (remainder !== 0)
return (units[div] + " lakh " + convert5digitIntoWords(remainder))
else
return (units[div] + " lakh ")
}
function convert5digitIntoWords(num) {
var remainder = num % 10000
var hun = num - remainder;
var div = Math.floor(num / 1000);
if (remainder !== 0)
return (convert2digitIntoWords(div) + " thousand " + convert3digitIntoWords(remainder % 1000))
else
return (convert2digitIntoWords(div) + " thousand")
}
function convert4digitIntoWords(num) {
var remainder = num % 1000
var hun = num - remainder;
var div = Math.floor(num / 1000);
if (remainder !== 0)
return (units[div] + " thousand " + convert3digitIntoWords(remainder))
else
return (units[div] + " thousand")
}
function convert3digitIntoWords(num) {
var remainder = num % 100
var hun = num - remainder;
var div = Math.floor(num / 100);
if (remainder !== 0)
return (units[div] + " hundred " + convert2digitIntoWords(remainder))
else
return (units[div] + " hundred ")
}
function convert2digitIntoWords(num) {
var remainder = num % 10;
var div = Math.floor(num / 10);
return (tens[div] + " " + convertNumIntoWords(remainder));
}
function convertNumIntoWords(num) {
switch (("" + num).length) {
case 1:
return units[num];
case 2:
return convert2digitIntoWords(num);
case 3:
return convert3digitIntoWords(num)
case 4:
return convert4digitIntoWords(num)
case 5:
return convert5digitIntoWords(num)
case 6:
return convert6digitIntoWords(num)
case 7:
return convert7digitIntoWords(num)
default:
return "cannot be converted"
}
}
console.log(convertNumIntoWords(3445125));
I was Forming some Programming Logic Used CHAR(34) for Quotes at Excel : A small Part of same I am posting which can be helpfull ,Hopefully
1 Customers
2 Invoices
Formula Used :
=CONCATENATE("listEvents.Add(",D4,",",CHAR(34),E4,CHAR(34),");")
Result :
listEvents.Add(1,"Customers");
listEvents.Add(2,"Invoices");
You're using a 32-bit OS, so you're going to be seeing limits on the total size due to that. Other answers have covered this in more detail, so I'll avoid repeating their information.
A behaviour that I noticed with our servers recently is that specifying a maximum heap size with -Xmx
while not specifying a minimum heap size with -Xms
would lead to Java's server VM immediately attempting to allocate all of the memory needed for the maximum heap size. And sure, if the app gets up to that heap size, that's the amount of memory that you'll need. But the chances are, your apps will be starting out with comparitively small heaps and may require the larger heap at some later point. Additionally specifying the minimum heap size will let you start your app start with a smaller heap and gradually grow that heap.
All of this isn't going to help you increase your maximum heap size, but I figured it might help, so...
Similar error as well. Realized I had an .htpasswd setup for the particular host. Uncommented it from the .htaccess file and worked fine.
see issue:
1.react-native start
2.click Reload(R,R)
on your device.
payton109’s answer is correct if you’re in the default US-EAST-1 region. If your bucket is in a different region, use a slightly different URL:
https://s3-<region>.amazonaws.com/your.domain.com/some/asset
Where <region>
is the bucket location name. For example, if your bucket is in the us-west-2
(Oregon) region, you can do this:
https://s3-us-west-2.amazonaws.com/your.domain.com/some/asset
Change Minute to be 0
. That's it :)
Note: you can check your "crons" in http://cronchecker.net/
Sorry this answer sucks, but you can't launch an just any external application via a click, as this would be a serious security issue, this functionality isn't available in HTML or javascript. Think of just launching cmd.exe
with args...you want to launch WinMerge with arguments, but you can see the security problems introduced by allowing this for anything.
The only possibly viable exception I can think of would be a protocol handler (since these are explicitly defined handlers), like winmerge://
, though the best way to pass 2 file parameters I'm not sure of, if it's an option it's worth looking into, but I'm not sure what you are or are not allowed to do to the client, so this may be a non-starter solution.
Also if you can set JVM timezone this way
System.setProperty("user.timezone", "EST");
or -Duser.timezone=GMT
in the JVM args.
They say it right there in the documentation for the FPDF constructor:
FPDF([string orientation [, string unit [, mixed size]]])
This is the class constructor. It allows to set up the page size, the orientation and the unit of measure used in all methods (except for font sizes). Parameters ...
size
The size used for pages. It can be either one of the following values (case insensitive):
A3 A4 A5 Letter Legal
or an array containing the width and the height (expressed in the unit given by unit).
They even give an example with custom size:
Example with a custom 100x150 mm page size:
$pdf = new FPDF('P','mm',array(100,150));
Actually your Windows firewall is blocking the connection. You need to enter these commands into cmd.exe
from Administrator.
netsh advfirewall firewall add rule name="FTP" dir=in action=allow program=%SystemRoot%\System32\ftp.exe enable=yes protocol=tcp
netsh advfirewall firewall add rule name="FTP" dir=in action=allow program=%SystemRoot%\System32\ftp.exe enable=yes protocol=udp
In case something goes wrong then you can revert by this:
netsh advfirewall firewall delete rule name="FTP" program=%SystemRoot%\System32\ftp.exe
In this code you access to root
directory project:
string _filePath = Path.GetDirectoryName(System.AppDomain.CurrentDomain.BaseDirectory);
then:
StreamReader r = new StreamReader(_filePath + "/cities2.json"))
TLDR
~ is what you want most of the time, it references past commits to the current branch
^ references parents (git-merge creates a 2nd parent or more)
A~ is always the same as A^
A~~ is always the same as A^^, and so on
A~2 is not the same as A^2 however,
because ~2 is shorthand for ~~
while ^2 is not shorthand for anything, it means the 2nd parent
I also landed in a similar situation. Use interactive rebase using the command below and while selecting, drop 3rd commit.
git rebase -i remote/branch
If you want integer i.e. number of days:
SELECT (EXTRACT(epoch FROM (SELECT (NOW() - '2014-08-02 08:10:56')))/86400)::int
Try the following:
<a asp-controller="Users" asp-action="Index"></a>
(Valid for ASP.NET 5 and MVC 6)
i'm running electron app and i can get the parent folder by path.resolve()
parent 1 level:path.resolve(__dirname, '..') + '/'
parent 2 levels:path.resolve(__dirname, '..', '..') + '/'
From Java 8 you can use this simple method for picking a random date from the date picker
List<WebElement> datePickerDays = driver.findElements(By.tagName("td"));
datePickerDays.stream().filter(e->e.getText().equals(whichDateYouWantToClick)).findFirst().get().click();
My solution (Kotlin):
class OnDebouncedClickListener(private val delayInMilliSeconds: Long, val action: () -> Unit) : View.OnClickListener {
var enable = true
override fun onClick(view: View?) {
if (enable) {
enable = false
view?.postDelayed(delayInMilliSeconds) { enable = true }
action()
}
}
}
fun View.setOnDebouncedClickListener(delayInMilliSeconds: Long = 500, action: () -> Unit) {
val onDebouncedClickListener = OnDebouncedClickListener(delayInMilliSeconds, action)
setOnClickListener(onDebouncedClickListener)
}
Use :
button.apply {
setOnDebouncedClickListener {
//your action on click
}
}
I don't know if this was true at the time of the original posting, but the siblings method allows selectors, so a reduction of what the OP listed should work.
$(this).siblings(':not(.closedTab)');
try grant privileges again.
GRANT ALL PRIVILEGES ON the_database.* TO 'the_user'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
If you're using
To get IntelliJ to recognize custom sourceset as test sources root:
plugin {
idea
}
idea {
module {
testSourceDirs = testSourceDirs + sourceSets["intTest"].allJava.srcDirs
testResourceDirs = testResourceDirs + sourceSets["intTest"].resources.srcDirs
}
}
To add to the other answers, by implementating java.io.Serializable
, you get "automatic" serialization capability for objects of your class. No need to implement any other logic, it'll just work. The Java runtime will use reflection to figure out how to marshal and unmarshal your objects.
In earlier version of Java, reflection was very slow, and so serializaing large object graphs (e.g. in client-server RMI applications) was a bit of a performance problem. To handle this situation, the java.io.Externalizable
interface was provided, which is like java.io.Serializable
but with custom-written mechanisms to perform the marshalling and unmarshalling functions (you need to implement readExternal
and writeExternal
methods on your class). This gives you the means to get around the reflection performance bottleneck.
In recent versions of Java (1.3 onwards, certainly) the performance of reflection is vastly better than it used to be, and so this is much less of a problem. I suspect you'd be hard-pressed to get a meaningful benefit from Externalizable
with a modern JVM.
Also, the built-in Java serialization mechanism isn't the only one, you can get third-party replacements, such as JBoss Serialization, which is considerably quicker, and is a drop-in replacement for the default.
A big downside of Externalizable
is that you have to maintain this logic yourself - if you add, remove or change a field in your class, you have to change your writeExternal
/readExternal
methods to account for it.
In summary, Externalizable
is a relic of the Java 1.1 days. There's really no need for it any more.
We do all our enums like this when it comes to Rest/Json etc. It has the advantage that the error is human readable and also gives you the accepted value list. We are using a custom method MyEnum.fromString instead of MyEnum.valueOf, hope it helps.
public enum MyEnum {
A, B, C, D;
private static final Map<String, MyEnum> NAME_MAP = Stream.of(values())
.collect(Collectors.toMap(MyEnum::toString, Function.identity()));
public static MyEnum fromString(final String name) {
MyEnum myEnum = NAME_MAP.get(name);
if (null == myEnum) {
throw new IllegalArgumentException(String.format("'%s' has no corresponding value. Accepted values: %s", name, Arrays.asList(values())));
}
return myEnum;
}
}
so for example if you call
MyEnum value = MyEnum.fromString("X");
you'll get an IllegalArgumentException with the following message:
'X' has no corresponding value. Accepted values: [A, B, C, D]
you can change the IllegalArgumentException to a custom one.
String someString = "" + c;
char c = someString.charAt(0);
What methods and properties you expose is a design decision. What base class you inherit from is an implementation detail. I feel it's worth taking a step back to the former.
An object is a collection of data and behaviour.
So your first questions should be:
Bear in mind that inheritance implies an "isa" (is a) relationship, whereas composition implies a "has a" (hasa) relationship. Choose the right one for your situation in your view, bearing in mind where things might go as your application evolves.
Consider thinking in interfaces before you think in concrete types, as some people find it easier to put their brain in "design mode" that way.
This isn't something everyone does consciously at this level in day to day coding. But if you're mulling this sort of topic, you're treading in design waters. Being aware of it can be liberating.
Take a look at List<T> and IList<T> on MSDN or Visual Studio. See what methods and properties they expose. Do these methods all look like something someone would want to do to a FootballTeam in your view?
Does footballTeam.Reverse() make sense to you? Does footballTeam.ConvertAll<TOutput>() look like something you want?
This isn't a trick question; the answer might genuinely be "yes". If you implement/inherit List<Player> or IList<Player>, you're stuck with them; if that's ideal for your model, do it.
If you decide yes, that makes sense, and you want your object to be treatable as a collection/list of players (behaviour), and you therefore want to implement ICollection or IList, by all means do so. Notionally:
class FootballTeam : ... ICollection<Player>
{
...
}
If you want your object to contain a collection/list of players (data), and you therefore want the collection or list to be a property or member, by all means do so. Notionally:
class FootballTeam ...
{
public ICollection<Player> Players { get { ... } }
}
You might feel that you want people to be able to only enumerate the set of players, rather than count them, add to them or remove them. IEnumerable<Player> is a perfectly valid option to consider.
You might feel that none of these interfaces are useful in your model at all. This is less likely (IEnumerable<T> is useful in many situations) but it's still possible.
Anyone who attempts to tell you that one of these it is categorically and definitively wrong in every case is misguided. Anyone who attempts to tell you it is categorically and definitively right in every case is misguided.
Once you've decided on data and behaviour, you can make a decision about implementation. This includes which concrete classes you depend on via inheritance or composition.
This may not be a big step, and people often conflate design and implementation since it's quite possible to run through it all in your head in a second or two and start typing away.
An artificial example: as others have mentioned, a team is not always "just" a collection of players. Do you maintain a collection of match scores for the team? Is the team interchangable with the club, in your model? If so, and if your team isa collection of players, perhaps it also isa collection of staff and/or a collection of scores. Then you end up with:
class FootballTeam : ... ICollection<Player>,
ICollection<StaffMember>,
ICollection<Score>
{
....
}
Design notwithstanding, at this point in C# you won't be able to implement all of these by inheriting from List<T> anyway, since C# "only" supports single inheritance. (If you've tried this malarky in C++, you may consider this a Good Thing.) Implementing one collection via inheritance and one via composition is likely to feel dirty. And properties such as Count become confusing to users unless you implement ILIst<Player>.Count and IList<StaffMember>.Count etc. explicitly, and then they're just painful rather than confusing. You can see where this is going; gut feeling whilst thinking down this avenue may well tell you it feels wrong to head in this direction (and rightly or wrongly, your colleagues might also if you implemented it this way!)
The guideline about not inheriting from collection classes isn't C# specific, you'll find it in many programming languages. It is received wisdom not a law. One reason is that in practice composition is considered to often win out over inheritance in terms of comprehensibility, implementability and maintainability. It's more common with real world / domain objects to find useful and consistent "hasa" relationships than useful and consistent "isa" relationships unless you're deep in the abstract, most especially as time passes and the precise data and behaviour of objects in code changes. This shouldn't cause you to always rule out inheriting from collection classes; but it may be suggestive.
string Time = "16:23:01";
DateTime date = DateTime.Parse(Time, System.Globalization.CultureInfo.CurrentCulture);
string t = date.ToString("HH:mm:ss tt");
The Main
method is Static. You can not invoke a non-static method from a static method.
GetRandomBits()
is not a static method. Either you have to create an instance of Program
Program p = new Program();
p.GetRandomBits();
or make
GetRandomBits()
static.
Check the following sample layout file
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="@color/white">
<RelativeLayout android:layout_height="fill_parent"
android:layout_width="fill_parent">
<ImageView android:id="@+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip" android:layout_marginTop="15dip"
android:src="@drawable/btn_blank" android:clickable="true" /> </RelativeLayout> </ScrollView>
PyInstaller will create a single .exe file with no dependencies; use the --onefile
option. It does this by packing all the needed shared libs into the executable, and unpacking them before it runs, just as you describe (EDIT: py2exe also has this feature, see minty's answer)
I use the version of PyInstaller from svn, since the latest release (1.3) is somewhat outdated. It's been working really well for an app which depends on PyQt, PyQwt, numpy, scipy and a few more.
Maybe you mean like this? I like to make an object and use Format-Table:
> $array = @()
> $object = New-Object -TypeName PSObject
> $object | Add-Member -Name 'Name' -MemberType Noteproperty -Value 'Joe'
> $object | Add-Member -Name 'Age' -MemberType Noteproperty -Value 32
> $object | Add-Member -Name 'Info' -MemberType Noteproperty -Value 'something about him'
> $array += $object
> $array | Format-Table
Name Age Info
---- --- ----
Joe 32 something about him
This will put all objects you have in the array in columns according to their properties.
Tip: Using -auto
sizes the table better
> $array | Format-Table -Auto
Name Age Info
---- --- ----
Joe 32 something about him
You can also specify which properties you want in the table. Just separate each property name with a comma:
> $array | Format-Table Name, Age -Auto
Name Age
---- ---
Joe 32
If you have entities A and B without any relation between them and there is strictly 0 or 1 B for each A, you could do:
select a, (select b from B b where b.joinProperty = a.joinProperty) from A a
This would give you an Object[]{a,b} for a single result or List<Object[]{a,b}> for multiple results.
The list selector drawable is a StateListDrawable
— it contains reference to multiple drawables for each state the list can be, like selected, focused, pressed, disabled...
While you can retrieve the drawable using getSelector()
, I don't believe you can retrieve a specific Drawable
from a StateListDrawable
, nor does it seem possible to programmatically retrieve the colour directly from a ColorDrawable
anyway.
As for setting the colour, you need a StateListDrawable
as described above. You can set this on your list using the android:listSelector
attribute, defining the drawable in XML like this:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false" android:state_focused="true"
android:drawable="@drawable/item_disabled" />
<item android:state_pressed="true"
android:drawable="@drawable/item_pressed" />
<item android:state_focused="true"
android:drawable="@drawable/item_focused" />
</selector>
The docs give a fair indicator of what's required., however requests
allow us to skip a few steps:
You only need to install the security
package extras (thanks @admdrew for pointing it out)
$ pip install requests[security]
or, install them directly:
$ pip install pyopenssl ndg-httpsclient pyasn1
Requests will then automatically inject pyopenssl
into urllib3
If you're on ubuntu, you may run into trouble installing pyopenssl
, you'll need these dependencies:
$ apt-get install libffi-dev libssl-dev
This is a part of security, you cannot do that. If you want to allow credentials then your Access-Control-Allow-Origin
must not use *
. You will have to specify the exact protocol + domain + port. For reference see these questions :
Besides *
is too permissive and would defeat use of credentials. So set http://localhost:3000
or http://localhost:8000
as the allow origin header.
Ben Alman has a good jquery querystring/url plugin here that allows you to manipulate the querystring easily.
As requested -
Goto his test page here
In firebug enter the following into the console
jQuery.param.querystring(window.location.href, 'a=3&newValue=100');
It will return you the following amended url string
http://benalman.com/code/test/js-jquery-url-querystring.html?a=3&b=Y&c=Z&newValue=100#n=1&o=2&p=3
Notice the a querystring value for a has changed from X to 3 and it has added the new value.
You can then use the new url string however you wish e.g using document.location = newUrl or change an anchor link etc
I had the same problem I altered the E:\NodeJS\ReactNativeApp\ExpoTest\node_modules\metro-config\src\defaults\blacklist.js in my project
from
var sharedBlacklist = [
/node_modules[/\\]react[/\\]dist[/\\].*/,
/website\/node_modules\/.*/,
/heapCapture\/bundle\.js/,
/.*\/__tests__\/.*/
];
to
var sharedBlacklist = [
/node_modules[\/\\]react[\/\\]dist[\/\\].*/,
/website\/node_modules\/.*/,
/heapCapture\/bundle\.js/,
/.*\/__tests__\/.*/
];
this worked perfectly for me
Found another solution for the same. It will be more helpful.
START C:\"Program Files (x86)"\Test\"Test Automation"\finger.exe ConfigFile="C:\Users\PCName\Desktop\Automation\Documents\Validation_ZoneWise_Default.finger.Config"
finger.exe is a parent program that is calling config solution. Note: if your path folder name consists of spaces, then do not forget to add "".
If scope must be applied in some cases, then you can set a timeout so that the $apply is deferred until the next tick
setTimeout(function(){ scope.$apply(); });
or wrap your code in a $timeout(function(){ .. }); because it will automatically $apply the scope at the end of execution. If you need your function to behave synchronously, I'd do the first.
Unfortunately, this is one of the many misnomers in the framework, or at best a violation of SRP.
To use the DateTimePicker for times, set the Format property to either Time or Custom (Use Custom if you want to control the format of the time using the CustomFormat property). Then set the ShowUpDown property to true.
Although a user may set the date and time together manually, they cannot use the GUI to set both.
When I align elements in center I use the bootstrap class text-center:
<div class="text-center">Centered content goes here</div>
The way I solved this was using flexbox. By using flexbox to layout the contents of your container div, you can have flexbox automatically distribute free space to an item above the one you want to have "stick to the bottom".
For example, say this is your container div with some other block elements inside it, and that the blue box (third one down) is a paragraph and the purple box (last one) is the one you want to have "stick to the bottom".
By setting this layout up with flexbox, you can set flex-grow: 1;
on just the paragraph (blue box) and, if it is the only thing with flex-grow: 1;
, it will be allocated ALL of the remaining space, pushing the element(s) after it to the bottom of the container like this:
(apologies for the terrible, quick-and-dirty graphics)
Try using this code for v3:
gMap = new google.maps.Map(document.getElementById('map'));
gMap.setZoom(13); // This will trigger a zoom_changed on the map
gMap.setCenter(new google.maps.LatLng(37.4419, -122.1419));
gMap.setMapTypeId(google.maps.MapTypeId.ROADMAP);
You're looking for delete
:
delete myhash['key2']
See the Core Javascript Guide
You can encrypt your SQLite database with the SEE addon. This way you prevent unauthorized access/modification.
Quoting SQLite documentation:
The SQLite Encryption Extension (SEE) is an enhanced version of SQLite that encrypts database files using 128-bit or 256-Bit AES to help prevent unauthorized access or modification. The entire database file is encrypted so that to an outside observer, the database file appears to contain white noise. There is nothing that identifies the file as an SQLite database.
You can find more info about this addon in this link.
Surprisingly this library not mentioned yet
python package named python-slugify, which does a pretty good job of slugifying:
pip install python-slugify
Works like this:
from slugify import slugify
txt = "This is a test ---"
r = slugify(txt)
self.assertEquals(r, "this-is-a-test")
txt = "This -- is a ## test ---"
r = slugify(txt)
self.assertEquals(r, "this-is-a-test")
txt = 'C\'est déjà l\'été.'
r = slugify(txt)
self.assertEquals(r, "cest-deja-lete")
txt = 'Nín hao. Wo shì zhong guó rén'
r = slugify(txt)
self.assertEquals(r, "nin-hao-wo-shi-zhong-guo-ren")
txt = '?????????'
r = slugify(txt)
self.assertEquals(r, "kompiuter")
txt = 'jaja---lol-méméméoo--a'
r = slugify(txt)
self.assertEquals(r, "jaja-lol-mememeoo-a")
It's said here that you should be able to add the following to your chart config:
credits: {
enabled: false
},
that will remove the "Highcharts.com" text from the bottom of the chart.
#include <thread>
#include <iostream>
#include <vector>
using namespace std;
void doSomething(int id) {
cout << id << "\n";
}
/**
* Spawns n threads
*/
void spawnThreads(int n)
{
std::vector<thread> threads(n);
// spawn n threads:
for (int i = 0; i < n; i++) {
threads[i] = thread(doSomething, i + 1);
}
for (auto& th : threads) {
th.join();
}
}
int main()
{
spawnThreads(10);
}
The objectsAreSame
function mentioned in @JasonBunting's answer works fine for me. However, there's a little problem: If x[propertyName]
and y[propertyName]
are objects (typeof x[propertyName] == 'object'
), you'll need to call the function recursively in order to compare them.
The to_char()
function is there to format numbers:
select to_char(column_1, 'fm000') as column_2
from some_table;
The fm
prefix ("fill mode") avoids leading spaces in the resulting varchar. The 000
simply defines the number of digits you want to have.
psql (9.3.5) Type "help" for help. postgres=> with sample_numbers (nr) as ( postgres(> values (1),(11),(100) postgres(> ) postgres-> select to_char(nr, 'fm000') postgres-> from sample_numbers; to_char --------- 001 011 100 (3 rows) postgres=>
For more details on the format picture, please see the manual:
http://www.postgresql.org/docs/current/static/functions-formatting.html
With the background-size property in those browsers which support this very new feature of CSS.
The best way is to use simple math
>>> a = 8
>>> a**(1./3.)
2.0
EDIT
For Negative numbers
>>> a = -8
>>> -(-a)**(1./3.)
-2.0
Complete Program for all the requirements as specified
x = int(input("Enter an integer: "))
if x>0:
ans = x**(1./3.)
if ans ** 3 != abs(x):
print x, 'is not a perfect cube!'
else:
ans = -((-x)**(1./3.))
if ans ** 3 != -abs(x):
print x, 'is not a perfect cube!'
print 'Cube root of ' + str(x) + ' is ' + str(ans)
In many circumstances they are different names for the same thing, but in some contexts they are quite different. So it depends. Terminology is not applied in a totally consistent way across the whole software industry.
For example in the classic sockets API, a non-blocking socket is one that simply returns immediately with a special "would block" error message, whereas a blocking socket would have blocked. You have to use a separate function such as select
or poll
to find out when is a good time to retry.
But asynchronous sockets (as supported by Windows sockets), or the asynchronous IO pattern used in .NET, are more convenient. You call a method to start an operation, and the framework calls you back when it's done. Even here, there are basic differences. Asynchronous Win32 sockets "marshal" their results onto a specific GUI thread by passing Window messages, whereas .NET asynchronous IO is free-threaded (you don't know what thread your callback will be called on).
So they don't always mean the same thing. To distil the socket example, we could say:
use
<activity android:name=".ActivityName"
android:theme="@android:style/Theme.NoTitleBar">
Probably the exact details of em.flush()
are implementation-dependent.
In general anyway, JPA providers like Hibernate can cache the SQL instructions they are supposed to send to the database, often until you actually commit the transaction.
For example, you call em.persist()
, Hibernate remembers it has to make a database INSERT, but does not actually execute the instruction until you commit the transaction. Afaik, this is mainly done for performance reasons.
In some cases anyway you want the SQL instructions to be executed immediately; generally when you need the result of some side effects, like an autogenerated key, or a database trigger.
What em.flush()
does is to empty the internal SQL instructions cache, and execute it immediately to the database.
Bottom line: no harm is done, only you could have a (minor) performance hit since you are overriding the JPA provider decisions as regards the best timing to send SQL instructions to the database.
Why not just:
import seaborn as sns
sns.barplot(list(D.keys()), list(D.values()))
Either bind the global Math object onto the scope (remember to use $window not window)
$scope.abs = $window.Math.abs;
Use the binding in your HTML:
<p>Distance from zero: {{abs(distance)}}</p>
Or create a filter for the specific Math function you're after:
module.filter('abs', ['$window', function($window) {
return function(n) {
return $window.Math.abs($window.parseInt(n));
};
});
Use the filter in your HTML:
<p>Distance from zero: {{distance | abs}}</p>