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For-each over an array in JavaScript
...
If the length of the array won't change during the loop, and it's in performance-sensitive code (unlikely), a slightly more complicated version grabbing the length up front might be a tiny bit faster:
var index, len;
var a = ["a", "b", "c"];
for (index = 0, len = a.length; index < len; ...
How to strip all whitespace from string
... ASCII whitespace:
(regular) space
tab
new line (\n)
carriage return (\r)
form feed
vertical tab
Additionally:
for Python 2 with re.UNICODE enabled,
for Python 3 without any extra actions,
...\s also covers the Unicode whitespace characters, for example:
non-breaking space,
em space,
ideographi...
How do I change selected value of select2 dropdown with JqGrid?
...n't have any custom actions binded to the change event (like reloading the form). Otherwise those actions would be called redundantly upon triggered change().
– van_folmert
Feb 22 '16 at 10:37
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Singular or plural controller and helper names in Rails
...ntifiers I define as a singular in one place are then used in their plural forms in other places. For example, I might want to define something like this in config/routes.rb:
resource :dashboard, :only => [:show]
and then I want a controller DashboardController to display summary information...
Is #pragma once a safe include guard?
...lation. I recognize that is non-standard, and thus could pose a cross-platform compatibility issue.
14 Answers
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Is there a limit to the length of a GET request? [duplicate]
...HOULD be able to handle URIs of unbounded length if they
provide GET-based forms that could generate such URIs. A server
SHOULD return 414 (Request-URI Too Long) status if a URI is longer
than the server can handle (see section 10.4.15).
Note: Servers should be cautious about depending on URI lengt...
For each row in an R dataframe
...w(tab)),
function(i) unclass(tab[i,,drop=F])
)
Or a faster, less clear form:
rows = function(x) lapply(seq_len(nrow(x)), function(i) lapply(x,"[",i))
This function just splits a data.frame to a list of rows. Then you can make a normal "for" over this list:
tab = data.frame(x = 1:3, y=2:4, z=...
Can gcc output C code after preprocessing?
...c -mtune=generic -march=x86-64 -fpch-preprocess -fstack-protector-strong -Wformat -Wformat-security -o main.i
/usr/lib/gcc/x86_64-linux-gnu/8/cc1 -fpreprocessed main.i -quiet -dumpbase main.c -mtune=generic -march=x86-64 -auxbase-strip main.o -version -fstack-protector-strong -Wformat -Wformat-secur...
PHPDoc type hinting for array of objects?
...ds this method:
specified containing a single type, the Type definition informs the reader of the type of each array element. Only one Type is then expected as element for a given array.
Example: @return int[]
share
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Executing injected by innerHTML after AJAX call
... output += '<\/script>';
Same goes for any closing tags, such as a form tag.