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Hex representation of a color with alpha channel?
...rimental web features to use this syntax. See Chromium Issue 618472 and Webkit bug 150853.
Android Apps that target Android P or newer can use this syntax
Opera supports this syntax in Opera 52 (or Opera 39 when experimental web features are enabled).
IE 11 and EdgeHTML 18 (Edge 44) do not support t...
Rails: Check output of path helper from console
Rails defines a bunch of magic with named routes that make helpers for your routes. Sometimes, especially with nested routes, it can get a little confusing to keep track of what URL you'll get for a given route helper method call. Is it possible to, using the Ruby console, see what link a given help...
Is optimisation level -O3 dangerous in g++?
...y popular demand, here an addition:
-O3 and especially additional flags like -funroll-loops (not enabled by -O3) can sometimes lead to more machine code being generated. Under certain circumstances (e.g. on a cpu with exceptionally small L1 instruction cache) this can cause a slowdown due to all th...
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
I make an outer join and executed successfully in the informix database but I get the following exception in my code:
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querySelector, wildcard element match?
...omeId.
[id*='someId'] will match all ids containing someId.
If you're looking for the name attribute just substitute id with name.
If you're talking about the tag name of the element I don't believe there is a way using querySelector
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Python Remove last 3 characters of a string
...'m trying to remove the last 3 characters from a string in python, I don't know what these characters are so I can't use rstrip , I also need to remove any white space and convert to upper-case
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What is JavaScript garbage collection?
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Eric Lippert wrote a detailed blog post about this subject a while back (additionally comparing it to VBScript). More accurately, he wrote about JScript, which is Microsoft's own implementation of ECMAScript, although very similar to JavaScript. I would imagine that you can assume the vast majo...
Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
...tive-c term for the object that is receiving the message (methods are also known as messages) so in my example here the receiver is superview.
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Should try…catch go inside or outside a loop?
I have a loop that looks something like this:
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Why does Google prepend while(1); to their JSON responses?
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It prevents JSON hijacking, a major JSON security issue that is formally fixed in all major browsers since 2011 with ECMAScript 5.
Contrived example: say Google has a URL like mail.google.com/json?action=inbox which returns the first 50 messages ...