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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
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First, note that this behavior applies to any default value that is subsequently mutated (e.g. hashes and strings), not just arrays.
TL;DR: Use Hash.new { |h, k| h[k] = [] } if you want the most idiomatic solution and don’t care why.
What doesn’...
CSS background image alt attribute
This is one I have not had to tackle before. I need to use alt tags on all images in a site including those used by CSS background-image attribute.
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How do I remove the space between inline/inline-block elements?
...wer has become rather popular, I'm rewriting it significantly.
Let's not forget the actual question that was asked:
How to remove the space between inline-block elements? I was hoping
for a CSS solution that doesn't require the HTML source code to be
tampered with. Can this issue be solved ...
Why and How to avoid Event Handler memory leaks?
...and answers on StackOverflow, that adding event handlers using += in C# (or i guess, other .net languages) can cause common memory leaks...
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Can Rails Routing Helpers (i.e. mymodel_path(model)) be Used in Models?
...swered Mar 28 '11 at 7:56
Paul HorsfallPaul Horsfall
7,80211 gold badge1616 silver badges77 bronze badges
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How to cast int to enum in C++?
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@Mitch what do I get for using auto in this case? Is there any performance improvements?
– Frederico Pantuzza
May 19 '17 at 3:29
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What is the purpose of willSet and didSet in Swift?
...point seems to be that sometimes, you need a property that has automatic storage and some behavior, for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to hold the value. With willSet and didSet, you can take action when the value...
Mercurial stuck “waiting for lock”
Got a bluescreen in windows while cloning a mercurial repository.
11 Answers
11
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JavaScript moving element in the DOM
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Trivial with jQuery
$('#div1').insertAfter('#div3');
$('#div3').insertBefore('#div2');
If you want to do it repeatedly, you'll need to use different selectors since the divs will retain their ids as they are moved around.
$(function() {
setInterval( function() {
$('div:first').inser...
What does the X-SourceFiles header do?
... a page's generated output back to that source file. It's only generated for localhost requests, so you don't need to worry about it being displayed to the world when you deploy the application to an actual server.
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