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Extract substring using regexp in plain bash
...perl :
$ echo "US/Central - 10:26 PM (CST)" |
perl -lne 'print $& if /\-\s+\K\d{2}:\d{2}/'
and last one using awk :
$ echo "US/Central - 10:26 PM (CST)" |
awk '{for (i=0; i<=NF; i++){if ($i == "-"){print $(i+1);exit}}}'
...
XSD: What is the difference between xs:integer and xs:int?
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The difference is the following:
xs:int is a signed 32-bit integer.
xs:integer is an integer unbounded value.
See for details https://web.archive.org/web/20151117073716/http://www.w3schools.com/schema/schema_dtypes_numeric.asp
Fo...
How can I remove an element from a list?
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If you don't want to modify the list in-place (e.g. for passing the list with an element removed to a function), you can use indexing: negative indices mean "don't include this element".
x <- list("a", "b", "c", "d", "e")...
Code Golf - π day
...t.
93 chars. This is based on same formula as FORTRAN solution (slightly different results than test cases). Calculates X^2=R^2-Y^2 for every Y
[rdPr1-d0<p]sp1?dsMdd*sRd2%--
[dd*lRr-vddlMr-32rlpxRR42r2*lpxRRAP4*2+lN+sN2+dlM>y]
dsyx5klNlR/p
88 chars. Iterative solution. Matches test cases. ...
git pull keeping local changes
How can I safely update (pull) a git project, keeping specific files untouched, even if there's upstream changes?
6 Answers...
How to hide command output in Bash
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Usually, output goes either to file descriptor 1 (stdout) or 2 (stderr). If you close a file descriptor, you'll have to do so for every numbered descriptor, as &> (below) is a special BASH syntax incompatible with >&-:
/your/first/command >&- 2>&-
Be careful to note ...
Setting CSS pseudo-class rules from JavaScript
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More specific reference URLs: - < w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet > - < developer.mozilla.org/en/DOM/CSSStyleSheet/insertRule > - < developer.apple.com/library/safari/#documentation/… >
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How do you remove a Cookie in a Java Servlet
..., HttpServletResponse resp) {
Cookie[] cookies = req.getCookies();
if (cookies != null)
for (Cookie cookie : cookies) {
cookie.setValue("");
cookie.setPath("/");
cookie.setMaxAge(0);
resp.addCookie(cookie);
}
}
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How to manage local vs production settings in Django?
...sed in both, but some of them (like paths to static files) need to remain different, and hence should not be overwritten every time the new code is deployed.
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How to Join to first row
...ned which one will it be.
Multiple invocations of the query can give you different line items for the same order, even if the underlying did not change.
If you want deterministic order, you should add an ORDER BY clause to the innermost query.
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