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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...
Difference between Java SE/EE/ME?
...with some basics, so I will write simple programs that create files, directories, edit XML files and so on, nothing too complex for now.
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jQuery - hashchange event
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You can detect if the browser supports the event by:
if ("onhashchange" in window) {
//...
}
See also:
Detecting event support without browser sniffing
Emulating onhashchange without setInterval
window.onhashchange
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How to correct TypeError: Unicode-objects must be encoded before hashing?
I have this error:
10 Answers
10
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What is the preferred Bash shebang?
Is there any Bash shebang objectively better than the others for most uses?
5 Answers
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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 return dictionary keys as a list in Python?
In Python 2.7 , I could get dictionary keys , values , or items as a list:
8 Answers
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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:
5 Answers
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Why is JsonRequestBehavior needed?
Why is Json Request Behavior needed?
5 Answers
5
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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.
4 Answers
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