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Ruby - elegantly convert variable to an array if not an array already
... or Array(foo) will work most of the time, but for some cases like a hash, it messes it up.
Array([1, 2, 3]) # => [1, 2, 3]
Array(1) # => [1]
Array(nil) # => []
Array({a: 1, b: 2}) # => [[:a, 1], [:b, 2]]
[*[1, 2, 3]] # => [1, 2, 3]
[*1] # => ...
Use cases for the 'setdefault' dict method
The addition of collections.defaultdict in Python 2.5 greatly reduced the need for dict 's setdefault method. This question is for our collective education:
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'\r': command not found - .bashrc / .bash_profile [duplicate]
...s in Cygwin...
Try running the dos2unix command on the file in question.
It might help when you see error messages like this:
-bash: '\r': command not found
Windows style newline characters can cause issues in Cygwin.
The dos2unix command modifies newline characters so they are Unix / Cygwin c...
Can't append element
... directly (by which I mean creating the HTML from text like you're trying with the script tag), but when you do them with built-in commands things go better. Try this:
var script = document.createElement( 'script' );
script.type = 'text/javascript';
script.src = url;
$("#someElement").append( scri...
Circular (or cyclic) imports in Python
...e was a really good discussion on this over at comp.lang.python last year. It answers your question pretty thoroughly.
Imports are pretty straightforward really. Just remember the following:
'import' and 'from xxx import yyy' are executable statements. They execute
when the running progra...
The SQL OVER() clause - when and why is it useful?
I read about that clause and I don't understand why I need it.
What does the function Over do? What does Partitioning By do?
Why can't I make a query with writing Group By SalesOrderID ?
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How to add footnotes to GitHub-flavoured Markdown?
I am just trying to add footnotes in my GitHub Gist , but it doesn't work:
10 Answers
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How does collections.defaultdict work?
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Usually, a Python dictionary throws a KeyError if you try to get an item with a key that is not currently in the dictionary. The defaultdict in contrast will simply create any items that you try to access (provided of course they do not exist yet). To create such a "default" item, it calls ...
How to scroll HTML page to given anchor?
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That doesn't actually scroll though, it just jumps. At that point you might as well just link to the anchor <a href="#anchorName">link</a>
– Ryan
Feb 7 '14 at 22:32
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How to add hyperlink in JLabel?
... view using html tags, but how to open the browser when the user clicks on it?
12 Answers
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