大约有 45,000 项符合查询结果（耗时：0.0317秒） [XML]
What is Func, how and when is it used
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edited Sep 2 '10 at 7:58
answered Sep 2 '10 at 7:48
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Find the nth occurrence of substring in a string
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21 Answers
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What do numbers using 0x notation mean?
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112
Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
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Annotating text on individual facet in ggplot2
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edited Aug 9 '12 at 19:24
Andy
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answered Aug 9 '12 a...
How to compare versions in Ruby?
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234
Gem::Version.new('0.4.1') > Gem::Version.new('0.10.1')
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How do I remove duplicate items from an array in Perl?
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edited Jun 21 '14 at 1:39
Miller
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Convert datetime object to a String of date only in Python
...o help you format your date.
E.g.,
import datetime
t = datetime.datetime(2012, 2, 23, 0, 0)
t.strftime('%m/%d/%Y')
will yield:
'02/23/2012'
More information about formatting see here
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Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
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277
Try to start the MySQL server:
mysql.server start
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PHP Function with Optional Parameters
I've written a PHP function that can accepts 10 parameters, but only 2 are required. Sometimes, I want to define the eighth parameter, but I don't want to type in empty strings for each of the parameters until I reach the eighth.
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Javascript shorthand ternary operator
...g for, where it defaults if undefined?
var foo = bar || 1; // 1
var bar = 2;
foo = bar || 1; // 2
By the way, this works for a lot of scenarios, including objects:
var foo = bar || {}; // secure an object is assigned when bar is absent
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