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How to check if a process id (PID) exists
...s -p $PID > /dev/null
then
echo "$PID is running"
# Do something knowing the pid exists, i.e. the process with $PID is running
fi
The problem with:
kill -0 $PID
is the exit code will be non-zero even if the pid is running and you dont have permission to kill it. For example:
kill -0 1...
Jquery If radio button is checked
... {
display: block;
}
<!-- note that the <input> elements are now not wrapped in the <label> elements,
in order that the #conditional element is a (subsequent) sibling of the radio
<input> elements: -->
<input type="radio" id="postageyes" name="postage" value="Yes" ...
MySQL and GROUP_CONCAT() maximum length
...lize method but as keatkeat has stated, this is only temporary. If anyone knows the right way to make this change permanently pls let me know
– IcedDante
Nov 18 '14 at 22:42
a...
Transposing a 2D-array in JavaScript
... can just do const transpose = apply(zip)
– Guy Who Knows Stuff
Apr 26 '18 at 5:09
1
Why would th...
Using HTML and Local Images Within UIWebView
... by choosing Add Files to "MyProj" and selecting Create folder references. Now the following code will take care about all the referred images, css and javascript
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"WEB/test.html" ofType:nil];
[webView loadRequest:[NSURLRequest requestWit...
Read a file in Node.js
...
With Node 0.12, it's possible to do this synchronously now:
var fs = require('fs');
var path = require('path');
// Buffer mydata
var BUFFER = bufferFile('../public/mydata.png');
function bufferFile(relPath) {
return fs.readFileSync(path.join(__dirname, relPath));...
Accurate way to measure execution times of php scripts
I want to know how many milliseconds a PHP for-loop takes to execute.
14 Answers
14
...
UICollectionView auto scroll to cell at IndexPath
...hat I'm trying to use. I have the number of the object in the array and I know the name of that object. But don't know how to put correct indexPath... Any ideas?
– AlexanderZ
Apr 13 '13 at 17:55
...
Can you make valid Makefiles without tab characters?
... nothing you can do about it if you are going to use make.
Edit: GNU Make now supports a custom recipe prefix. See this answer.
You are not the first one to dislike this aspect of make. To quote Unix Haters' Handbook:
The problem with Dennis’s Makefile is that when he added the comment line...
Java: Clear the console
... Windows installation that could be invoked via Runtime.exec, as the well-known command cls is builtin to Windows’ command line interpreter.
When launching a new process via Runtime.exec, the standard output gets redirected to a pipe which the initiating Java process can read. But when the output ...