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Convert HH:MM:SS string to seconds only in javascript
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Try this:
var hms = '02:04:33'; // your input string
var a = hms.split(':'); // split it at the colons
// minutes are worth 60 seconds. Hours are worth 60 minutes.
var seconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 + (+a[2]);
console.log(seconds...
What's quicker and better to determine if an array key exists in PHP?
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10 Answers
10
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How do I pass command-line arguments to a WinForms application?
... two different WinForms applications, AppA & AppB. Both are running .NET 2.0.
6 Answers
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Renaming columns in pandas
...he .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [10,20]})
>>> df.columns = ['a', 'b']
>>> df
a b
0 1 10
1 2 20
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On localhost, how do I pick a free port number?
...do I figure out which port is available? I assume I cannot listen on port 80 or 21?
5 Answers
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What is the preferred/idiomatic way to insert into a map?
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edited Nov 26 '10 at 18:37
user229044♦
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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
20个命令行工具监控 Linux 系统性能原文出处：Tecmint.Com-Ravi Saive译文出处：Linux story-FOREST对于每个系统管理员或网络管理员来说，每天要监控和调试 Linux 系统性...原文出处： Tecmint.Com-Ravi Saive 译文出处：Linux story-FOREST
对于每...
Value of i for (i == -i && i != 0) to return true in Java
....toBinaryString(Integer.MIN_VALUE));
you see that Integer.MIN_VALUE is
10000000000000000000000000000000
Taking the negative value is done by first swapping 0 and 1, which gives
01111111111111111111111111111111
and by adding 1, which gives
10000000000000000000000000000000
As you can see in...
Is there a difference between x++ and ++x in java?
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answered Jul 7 '09 at 21:09
Emil HEmil H
37.1k1010 gold badges7171 silver badges9494 bronze badges
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