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How can I remove 3 characters at the end of a string in php?
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Just do:
echo substr($string, 0, -3);
You don't need to use a strlen call, since, as noted in the substr docs:
If length is given and is negative, then that many characters will be omitted from the end of string
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How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
...tring columnName = String.Empty;
int modulo;
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}
return columnName;
}
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How does the algorithm to color the song list in iTunes 11 work? [closed]
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+50
I approximated the iTunes 11 color algorithm in Mathematica given the album cover as input:
How I did it
Through trial and error...
How to make child process die after parent exits?
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edited Nov 13 '08 at 18:25
answered Nov 12 '08 at 16:12
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关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
本帖最后由 天空一直巨响 于 2015-09-20 11:35 编辑
做了好几年的flash的aser，技术一直停留在flash这个狭小的容器内，最近转向php，才慢慢体会到之前充实技术开发前的那段极度渴望去学习新知识的那种动力，可能在大多数的人眼...
How to read from stdin line by line in Node
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edited Mar 20 '15 at 14:45
Gavin
62466 silver badges2020 bronze badges
answered Nov 20 '13...
Is there a C# type for representing an integer Range?
...need to store an integer range. Is there an existing type for that in C# 4.0?
10 Answers
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How can I create a Set of Sets in Python?
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answered May 9 '11 at 0:18
a3nma3nm
7,50155 gold badges2525 silver badges3737 bronze badges
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Check if a string matches a regex in Bash script
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330
You can use the test construct, [[ ]], along with the regular expression match operator, =~, to ...
Select rows which are not present in other table
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+500
There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM ...