大约有 34,000 项符合查询结果(耗时:0.0394秒) [XML]
How to trim a string to N chars in Javascript?
...re helpful for longer max): var string = "this is a string"; var length = 20; var trimmedString = string.length > length ? string.substring(0, length - 3) + "..." : string.substring(0, length);
– Will
Sep 13 '12 at 15:19
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How to check if hex color is “too black”?
...09
if (luma < 40) {
// pick a different colour
}
EDIT
Since May 2014 tinycolor now has a getBrightness() function, albeit using the CCIR601 weighting factors instead of the ITU-R ones above.
EDIT
The resulting luma value range is 0..255, where 0 is the darkest and 255 is the lightest. V...
Find a value in an array of objects in Javascript [duplicate]
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20 Answers
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Active
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How to ignore a property in class if null, using json.net
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edited Jan 30 '16 at 20:51
answered Jun 28 '11 at 14:20
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Adding days to a date in Python
...EP8.
– Aaron McMillin
Jun 26 '17 at 20:28
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show 4 more comments
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Sublime Text 2 - View whitespace characters
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– Mithun Sreedharan
Feb 15 '13 at 13:20
3
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How do I create a unique constraint that also allows nulls?
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SQL Server 2008 +
You can create a unique index that accept multiple NULLs with a WHERE clause. See the answer below.
Prior to SQL Server 2008
You cannot create a UNIQUE constraint and allow NULLs. You need set a default value of NEW...
Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
...bicking.org/illusive-setdefaultencoding.html
http://nedbatchelder.com/blog/200401/printing_unicode_from_python.html
http://www.diveintopython3.net/strings.html#one-ring-to-rule-them-all
http://boodebr.org/main/python/all-about-python-and-unicode
http://blog.notdot.net/2010/07/Getting-unicode-right-i...
“Ago” date/time functions in Ruby/Rails
...ce alias for from_now and many available methods
Time.current
#=> Tue, 20 Sep 2016 15:03:30 UTC +00:00
2.minutes.ago
#=> Tue, 20 Sep 2016 15:01:30 UTC +00:00
2.minutes.since
#=> Tue, 20 Sep 2016 15:05:30 UTC +00:00
1.month.ago
#=> Sat, 20 Aug 2016 15:03:30 UTC +00:00
1.year.since
#...
Commands out of sync; you can't run this command now
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