大约有 46,000 项符合查询结果（耗时：0.0752秒） [XML]
Replace a string in shell script using a variable
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147
If you want to interpret $replace, you should not use single quotes since they prevent variable...
What does the clearfix class do in css? [duplicate]
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edited Aug 5 '14 at 13:47
answered Mar 3 '12 at 4:52
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Inserting a Python datetime.datetime object into MySQL
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4
Also, make sure your column name isn't a reserved word. Took me 30 minutes to realize the name "current_date" was causing problems...ugh!
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Yellow fade effect with JQuery
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edited Jan 6 '10 at 12:34
Jon Winstanley
21.3k2020 gold badges6767 silver badges106106 bronze badges
a...
What is the difference between float and double?
...)÷log(10) = 15.95 digits
float has 23 mantissa bits + 1 hidden bit: log(224)÷log(10) = 7.22 digits
This precision loss could lead to greater truncation errors being accumulated when repeated calculations are done, e.g.
float a = 1.f / 81;
float b = 0;
for (int i = 0; i < 729; ++ i)
b += a;...
How to remove the left part of a string?
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Xavier GuihotXavier Guihot
23.7k1414 gold badges132132 silver badges9696 bronze badges
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Difference between pre-increment and post-increment in a loop?
...ch (string item in items)
{
Console.WriteLine(i++);
}
Output:
1
2
3
4
0
1
2
3
foreach and while loops depend on which increment type you use. With for loops like below it makes no difference as you're not using the return value of i:
for (int i = 0; i < 5; i++) { Console.Write(i);}
Con...
Detect Android phone via Javascript / jQuery
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Michael LumbrosoMichael Lumbroso
4,59155 gold badges2323 silver badges3434 bronze badges
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SVN checkout ignore folder
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104
You can't directly ignore folders on a checkout, but you can use sparse checkouts in svn 1.5. F...
Difference between String replace() and replaceAll()
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Valentin Michalak
1,6491111 silver badges2323 bronze badges
answered May 31 '12 at 5:28
emilanemilan
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