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When to use symbols instead of strings in Ruby?
...rule of thumb is to use symbols every time you need internal identifiers. For Ruby < 2.2 only use symbols when they aren't generated dynamically, to avoid memory leaks.
Full answer
The only reason not to use them for identifiers that are generated dynamically is because of memory concerns.
Thi...
How to return dictionary keys as a list in Python?
In Python 2.7 , I could get dictionary keys , values , or items as a list:
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Guid.NewGuid() vs. new Guid()
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@JonHanna All guids make great special values. Unfortunately, the empty ones have a tendancy to collide. I agree that empty guids are useful though, typically to indicate that something is uninitialized.
– MarkPflug
Aug 13 '12 at 16:27
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How to capture UIView to UIImage without loss of quality on retina display
My code works fine for normal devices but creates blurry images on retina devices.
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What is the purpose of the '@' symbol in CSS?
...question and I noticed the user is using some notation I've never seen before:
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Why is JsonRequestBehavior needed?
Why is Json Request Behavior needed?
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Open files in 'rt' and 'wt' modes
Several times here on SO I've seen people using rt and wt modes for reading and writing files.
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Inserting HTML elements with JavaScript
Instead of tediously search for workarounds for each type of attribute and event when using the following syntax:
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Dialog throwing "Unable to add window — token null is not for an application” with getApplication()
...ng to create an AlertDialog which requires a Context as a parameter. This works as expected if I use:
28 Answers
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Can you turn off Peek Definition in Visual Studio 2013 and up?
...rl + Click. At first I thought this was cool, but I have found that the majority of the time, I need to click the Promote to Document button, since I make lots of changes to the files I Ctrl + Click on. But after Googling how to turn off Peek Definition, I can't find any details on if this is poss...