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What is the difference between square brackets and parentheses in a regex?
.../^[789]\d{9}$/
/^[7-9]\d{9}$/
The explanation:
(a|b|c) is a regex "OR" and means "a or b or c", although the presence of brackets, necessary for the OR, also captures the digit. To be strictly equivalent, you would code (?:7|8|9) to make it a non capturing group.
[abc] is a "character class" th...
augmented reality framework [closed]
I am planning to develop an augmented reality application for Android phone. Does anyone know if there is any existing framework for augmented reality which could be used for such applications?
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How can I calculate the difference between two dates?
How can I calculate the days between 1 Jan 2010 and (for example) 3 Feb 2010?
9 Answers
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Jelly Bean DatePickerDialog — is there a way to cancel?
...explanation of the issue. I'm not sure if I should edit the other question and paste this content there, but I'm not comfortable changing someone else's question too much. ---
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Best Java obfuscator? [closed]
I am developing a security software and want to obfuscate my java code so it will become impossible to reverse engineer. What is the most reliable java obfuscator ?
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Get escaped URL parameter
I'm looking for a jQuery plugin that can get URL parameters, and support this search string without outputting the JavaScript error: "malformed URI sequence". If there isn't a jQuery plugin that supports this, I need to know how to modify it to support this.
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Weird Integer boxing in Java
... in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
r1 and r2 be the results of any two
boxing conversions of p. It is always
the case that r1 == r2.
The discussion goes on, suggesting that although your second line of output is guaranteed, the first ...
How are Anonymous inner classes used in Java?
...ut actually making a separate class.
I only use this technique for "quick and dirty" tasks where making an entire class feels unnecessary. Having multiple anonymous inner classes that do exactly the same thing should be refactored to an actual class, be it an inner class or a separate class.
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What is the difference between allprojects and subprojects
...e tell me what exactly is the difference between the "allprojects" section and the "subprojects" one? Just the parent directory? Does anyone use both? If so, do you have general rules that determines what typically is put in each one?
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Is there a way to tell git to only include certain files instead of ignoring certain files?
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*.c
!frob_*.c
!custom.c
To have it ignore all .c files except custom.c and anything starting with "frob_"
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