大约有 14,000 项符合查询结果（耗时：0.0097秒） [XML]
Why start a shell command with a backslash?
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Aliases can be used in scripts by using shopt -s expand_aliases before use of the alias
– Alex
Mar 28 '13 at 21:06
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Python using enumerate inside list comprehension
...o work. Alternatively, given that enumerate() already returns a tuple, you can return it directly without unpacking it first:
[pair for pair in enumerate(mylist)]
Either way, the result that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
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What does the arrow operator, '->', do in Java?
While hunting through some code I came across the arrow operator, what exactly does it do? I thought Java did not have an arrow operator.
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Rails: convert UTC DateTime to another time zone
...ne)
Example:
zone = ActiveSupport::TimeZone.new("Central Time (US & Canada)")
Time.now.in_time_zone(zone)
or just
Time.now.in_time_zone("Central Time (US & Canada)")
You can find the names of the ActiveSupport time zones by doing:
ActiveSupport::TimeZone.all.map(&:name)
# or for...
C#: How to convert a list of objects to a list of a single property of that object?
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Thanks. Also, how would I sort that alphabetically by firstname?
– User
Sep 22 '09 at 16:36
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Set Viewbag before Redirect
Is it possible to set the ViewBag before I call a redirection?
5 Answers
5
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Escape double quotes in a string
Double quotes can be escaped like this:
6 Answers
6
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Remove accents/diacritics in a string in JavaScript
...s, which the Unicode standard conveniently groups as the Combining Diacritical Marks Unicode block.
See comment for performance testing.
Alternatively, if you just want sorting
Intl.Collator has sufficient support ~95% right now, a polyfill is also available here but I haven't tested it.
const c = ...
What is the session's “secret” option?
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Not only can you change it, but you should change it.
– Michael Mior
Sep 3 '12 at 2:29
1
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Right query to get the current number of connections in a PostgreSQL DB
...st one would be:
SELECT sum(numbackends) FROM pg_stat_database;
In that case, I would expect that version to be slightly faster than the second one, simply because it has fewer rows to count. But you are not likely going to be able to measure a difference.
Both queries are based on exactly the s...