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How to check if a value exists in an array in Ruby
I have a value 'Dog' and an array ['Cat', 'Dog', 'Bird'] .
26 Answers
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How to use filter, map, and reduce in Python 3
filter , map , and reduce work perfectly in Python 2. Here is an example:
7 Answers
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What is a covariant return type?
What is a covariant return type in Java? In object-oriented programming in general?
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What is the most “pythonic” way to iterate over a list in chunks?
I have a Python script which takes as input a list of integers, which I need to work with four integers at a time. Unfortunately, I don't have control of the input, or I'd have it passed in as a list of four-element tuples. Currently, I'm iterating over it this way:
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How do I close a single buffer (out of many) in Vim?
I open several files in Vim by, for example, running
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What's the best way to convert a number to a string in JavaScript? [closed]
What's the "best" way to convert a number to a string (in terms of speed advantage, clarity advantage, memory advantage, etc) ?
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How to get a specific version of a file in Mercurial?
I am new to Mercurial. Just cannot find the right command. Tried update/checkout with no luck. I am using local repository. Thanks
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Checking for empty queryset in Django
What is the recommended idiom for checking whether a query returned any results?
Example:
7 Answers
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How should one go about choosing a default TCP/IP port for a new service?
When developing an app that will listen on a TCP/IP port, how should one go about selecting a default port? Assume that this app will be installed on many computers, and that avoiding port conflicts is desired.
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Is it a good practice to use an empty URL for a HTML form's action attribute? (action=“”)
I am wondering if anyone can give a "best practices" response to using blank HTML form actions to post back to the current page.
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