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What's a good way to extend Error in JavaScript?
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The only standard field Error object has is the message property. (See MDN, or EcmaScript Language Specification, section 15.11) Everything else is platform specific.
Mosts environments set the stack property, but fileName and lineNumber are practically useless to ...
How to properly URL encode a string in PHP?
I'm making a search page, where you type a search query and the form is submitted to search.php?query=your query . What PHP function is the best and that I should use for encoding/decoding the search query?
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What do
... be substituted with any type
// getStringLength can only be used if this is a Foo[String]
def getStringLength(implicit evidence: A =:= String) = a.length
}
The implicit argument evidence is supplied by the compiler, iff A is String. You can think of it as a proof that A is String--the arg...
Handling file renames in git
...nges, perform your rename and then stage your renamed file. Git will recognise the file from the contents, rather than seeing it as a new untracked file, and keep the change history.
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grep a file, but show several surrounding lines?
...lowing five lines as well as the matched line. How would I be able to do this?
13 Answers
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Let JSON object accept bytes or let urlopen output strings
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HTTP sends bytes. If the resource in question is text, the character encoding is normally specified, either by the Content-Type HTTP header or by another mechanism (an RFC, HTML meta http-equiv,...).
urllib should know how to encode the bytes to a string, but it's too n...
how to show lines in common (reverse diff)?
...n the lines which are different between them. Command line unix or windows is fine.
7 Answers
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How to generate random number in Bash?
... and 10 (inclusive):
$ echo $((1 + RANDOM % 10))
3
The actual generator is in variables.c, the function brand(). Older versions were a simple linear generator. Version 4.0 of bash uses a generator with a citation to a 1985 paper, which presumably means it's a decent source of pseudorandom numbers...
ConnectionTimeout versus SocketTimeout
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A connection timeout occurs only upon starting the TCP connection. This usually happens if the remote machine does not answer. This means that the server has been shut down, you used the wrong IP/DNS name, wrong port or the network connection to the server is down.
A socket timeout is dedicat...
How do I programmatically determine if there are uncommitted changes?
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UPDATE: the OP Daniel Stutzbach points out in the comments that this simple command git diff-index worked for him:
git update-index --refresh
git diff-index --quiet HEAD --
A more precise option would be to test git status --porcelain=v1 2>/dev/null | wc -l, using the porcelain option....