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What is a good regular expression to match a URL? [duplicate]
...[-a-zA-Z0-9()@:%_\+.~#?&//=]*)
To try this out see http://regexr.com?37i6s, or for a version which is less restrictive http://regexr.com/3e6m0.
Example JavaScript implementation:
var expression = /[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)?/gi;...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
boost Composite keysComposite keysIn relational databases, composite keys depend on two or more fields of a given table The analogous concept in Boost MultiIndex is Composite keys
In relational databases, composite keys depend on two or more fields of a given table. The analogous concept in Boos...
How to create circle with Bézier curves?
...in the sense that the middle of the curve lies on the circle itself, is (4/3)*tan(pi/(2n)).
So for 4 points it is (4/3)*tan(pi/8) = 4*(sqrt(2)-1)/3 = 0.552284749831.
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Format a Go string without printing?
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ndequeker
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answered Jun 20 '12 at 16:43
SoniaSonia
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How do I output an ISO 8601 formatted string in JavaScript?
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463
There is already a function called toISOString():
var date = new Date();
date.toISOString(); /...
How to get cumulative sum
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select t1.id, t1.SomeNumt, SUM(t2.SomeNumt) as sum
from @t t1
inner join @t t2 on t1.id >= t...
Suppress warning CS1998: This async method lacks 'await'
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Stephen ClearyStephen Cleary
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How do I use reflection to call a generic method?
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Philippe
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answered Oct 24 '08 at 6:13
Jon SkeetJon Skee...
Compelling examples of custom C++ allocators?
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edited May 23 '17 at 12:18
community wiki
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What do the f and t commands do in Vim?
...th a number to move to the nth occurrence of that character. For example, 3fb would move to the third b to the right of the cursor. My example sentence only has one b though, so the cursor wouldn't move at all.
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