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LINQ with groupby and count
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After calling GroupBy, you get a series of groups IEnumerable<Grouping>, where each Grouping itself exposes the Key used to create the group and also is an IEnumerable<T> of whatever items are in your original data set. ...
setState vs replaceState in React.js
...ows out the current state, and replaces it with only what you provide. Usually setState is used unless you really need to remove keys for some reason; but setting them to false/null is usually a more explicit tactic.
While it's possible it could change; replaceState currently uses the object passe...
how to show alternate image if source image is not found? (onerror working in IE but not in mozilla)
... found" onerror="this.onerror=null;this.src='imagefound.gif';" />
By calling this.onerror=null it will remove the onerror then try to get the alternate image.
NEW
I would like to add a jQuery way, if this can help anyone.
<script>
$(document).ready(function()
{
$(".backup_picture"...
Configuring user and password with Git Bash
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I cannot use SSH because of internal firewall rules (don't ask...) Is there another way to let git login automatically?
– Jorn
Apr 20 '15 at 9:04
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What requirement was the tuple designed to solve?
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When writing programs it is extremely common to want to logically group together a set of values which do not have sufficient commonality to justify making a class.
Many programming languages allow you to logically group together a set of otherwise unrelated values without creating ...
What does @synchronized() do as a singleton method in objective C?
...probably isn't multithreaded, and you probably don't need to use it (especially if the singleton itself isn't thread-safe).
Edit: Adding some more information that wasn't in the original answer from 2011.
The @synchronized directive prevents multiple threads from entering any region of code that...
C# generic type constraint for everything nullable
...vs. the unhandiness of exceptions in a static constructor. Since you're really implementing a poor-mans static analyzer here, this exception should never be thrown except during development. Finally, even if you want to avoid static construction exceptions at all costs (unwise), then you should sti...
Trim string in JavaScript?
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All browsers since IE9+ have trim() method for strings.
For those browsers who does not support trim(), you can use this polyfill from MDN:
if (!String.prototype.trim) {
(function() {
// Make sure we trim BOM an...
How can I brew link a specific version?
...n>
Example:
brew switch mysql 5.5.29
You can find the versions installed on your system with info.
brew info mysql
And to see the available versions to install, you can provide a dud version number, as brew will helpfully respond with the available version numbers:
brew switch mysql 0
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How to view the list of compile errors in IntelliJ?
I am looking for a way to view all compile errors in IntelliJ, similar to how they are displayed in Eclipse. I tried searching here and Google but have not really found a solution. I really like IntelliJ, I recently converted to it from Eclipse, and I hope this is just something I am missing and n...