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if, elif, else statement issues in Bash
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460
There is a space missing between elif and [:
elif[ "$seconds" -gt 0 ]
should be
elif [ "$sec...
ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...这样构造我们的CAtlRegExp类：
CAtlRegExp <> re;
re.Parse( "{[0-9]?[0-9]}:{[0-9][0-9]}" );
ATL的正则表达式语法和Perl的正则表达式语法大同小异，不过有一个值得注意的地方就 是ATL中用大括号（{ }）表示其匹配字符串中的Group，我们上...
Set Matplotlib colorbar size to match graph
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import numpy as np
plt.figure()
ax = plt.gca()
im = ax.imshow(np.arange(100).reshape((10,10)))
# create an axes on the right side of ax. The width of cax will be 5%
# of ax and the padding between cax and ax will be fixed at 0.05 inch.
divider = make_axes_locatable(ax)
cax = divider.append_axes("...
How to deal with floating point number precision in JavaScript?
...st irritated that their programs don't work correctly with numbers like 1/10 without realizing that they wouldn't even blink at the same error if it occurred with 1/3.
If the first point really applies to you, use BigDecimal for JavaScript, which is not elegant at all, but actually solves the probl...
How can I get a count of the total number of digits in a number?
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Without converting to a string you could try:
Math.Ceiling(Math.Log10(n));
Correction following ysap's comment:
Math.Floor(Math.Log10(n) + 1);
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PDOException SQLSTATE[HY000] [2002] No such file or directory
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answered Dec 22 '13 at 19:08
ukautzukautz
1,99311 gold badge1111 silver badges77 bronze badges
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The modulo operation on negative numbers in Python
...nually fix it up by adding 7:
int result = (2 - N) % 7;
return result &lt; 0 ? result + 7 : result;
(See http://en.wikipedia.org/wiki/Modulo_operator for how the sign of result is determined for different languages.)
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Convert a number range to another range, maintaining ratio
...) + NewMin
Or if you want to protect for the case where the old range is 0 (OldMin = OldMax):
OldRange = (OldMax - OldMin)
if (OldRange == 0)
NewValue = NewMin
else
{
NewRange = (NewMax - NewMin)
NewValue = (((OldValue - OldMin) * NewRange) / OldRange) + NewMin
}
Note that in this...
Is SQL or even TSQL Turing Complete?
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Qantas 94 Heavy
14.4k1616 gold badges6060 silver badges7777 bronze badges
answered Sep 28 '11 at 7:59
Jan de VosJan de Vos
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