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How to check if a variable is set in Bash?
... to a non-empty value, whereas specifying the empty string should make the script use an empty extension or list of additional properties.
The distinction may not be essential in every scenario though. In those cases [ -z "$var" ] will be just fine.
...
Change default text in input type=“file”?
...n() {
filename = this.files[0].name
console.log(filename);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<label for="files" class="btn">Select Image</label>
<input id="files" style="visibilit...
Running unittest with typical test directory structure
...
The simplest solution for your users is to provide an executable script (runtests.py or some such) which bootstraps the necessary test environment, including, if needed, adding your root project directory to sys.path temporarily. This doesn't require users to set environment variables, som...
Which version of Python do I have installed?
I have to run a Python script on a Windows server. How can I know which version of Python I have, and does it even really matter?
...
What's the best way to make a d3.js visualisation layout responsive?
Assume I have a histogram script that builds a 960 500 svg graphic. How do I make this responsive so on resize the graphic widths and heights are dynamic?
...
Setting PayPal return URL and making it auto return?
...link.
<?php
// Check to see there are posted variables coming into the script
if ($_SERVER['REQUEST_METHOD'] != "POST")
die("No Post Variables");
// Initialize the $req variable and add CMD key value pair
$req = 'cmd=_notify-validate';
// Read the post from PayPal
foreach ($_POST as $key =&g...
val() doesn't trigger change() in jQuery [duplicate]
...).trigger('input');
$('#txt').trigger('input');
$('#txt').change();
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" id="txt">
you have to use .dispatchEvent() instead.
txt.addEventListener('input', functio...
About Android image and asset sizes
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Based on kcoppock's answer I have created the following shell script to automatically resize all images to the correct size and copy them in the respective Android drawable-* - folders!
Create a shell script and paste the following code:
createAndroidImages.sh
#!/bin/bash
read -p "P...
Replacing .NET WebBrowser control with a better browser, like Chrome?
... are some js problems. Everyone using it will almost immediately notice js alert does nothing. Events like mouseup,mousedown... etc. doesn't work, js drag and drop is buggy and so on..
I also had some difficulties installing it since it requires specific version of VC redistributable installed, so a...
How to force link from iframe to be opened in the parent window
...
With JavaScript:
window.parent.location.href= "http://www.google.com";
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