大约有 47,000 项符合查询结果（耗时：0.0430秒） [XML]
In Ruby how do I generate a long string of repeated text?
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310
str = "0" * 999999
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Providing white space in a Swing GUI
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+200
Using various LayoutManagers one can provide spacing between various components.
1.) BorderLayout :
Overloaded Constructor : Bor...
How can I replace a regex substring match in Javascript?
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140
var str = 'asd-0.testing';
var regex = /(asd-)\d(\.\w+)/;
str = str.replace(regex, "$11$2");
c...
Finding all possible combinations of numbers to reach a given sum
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250
This problem can be solved with a recursive combinations of all possible sums filtering out thos...
How can I convert a zero-terminated byte array to string?
I need to read [100]byte to transfer a bunch of string data.
13 Answers
13
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Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
How to detect if Visual C++ Redistributable for Visual Studio 2012 is installed?
20 Answers
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Regex how to match an optional character
...e letter optional. {1} is redundant. (Of course you could also write [A-Z]{0,1} which would mean the same, but that's what the ? is there for.)
You could improve your regex to
^([0-9]{5})+\s+([A-Z]?)\s+([A-Z])([0-9]{3})([0-9]{3})([A-Z]{3})([A-Z]{3})\s+([A-Z])[0-9]{3}([0-9]{4})([0-9]{2})([0-9]{2})
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What's the best way to get the last element of an array without deleting it?
... share my findings with you, benchmarked against PHP versions 5.6.38, 7.2.10 and 7.3.0RC1 (expected Dec 13 2018).
The options (<<option code>>s) I will test are:
option .1. $x = array_values(array_slice($array, -1))[0]; (as suggested by rolacja)
option .2. $x = array_slice($array, -1)...
Matplotlib - global legend and title aside subplots
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edited Mar 13 at 17:30
answered Feb 10 '12 at 0:47
orb...
What is a regular expression for a MAC Address?
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The standard (IEEE 802) format for
printing MAC-48 addresses in
human-friendly form is six groups of
two hexadecimal digits, separated by
hyphens - or colons :.
So:
^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$
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