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Using bitwise OR 0 to floor a number
...oving the fractional part
All bitwise operations except unsigned right shift, >>>, work on signed 32-bit integers. So using bitwise operations will convert a float to an integer.
Does it have any advantages over doing Math.floor? Maybe it's a bit
faster? (pun not intended)
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Variable is accessed within inner class. Needs to be declared final
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If you don't want to make it final, you can always just make it a global variable.
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How to make a new List in Java
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If you use an IDE you can also generally view a type hierarchy in there, which may be more convenient. In Eclipse the default shortcut is F4, and in IDEA it is Ctrl+H.
– David Mason
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Git undo local branch delete
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Edit: As @seagullJS says, the branch -D command tells you the sha1, so if you haven't closed the terminal yet it becomes real easy. For example this deletes and then immediately restores a branch named master2:
user@MY-PC /C/MyRepo (master)
$ git branch -D master2
Deleted branch master2 (was 13...
Convert special characters to HTML in Javascript
...").replace(/"/g, """);
But taking into account your desire for different handling of single/double quotes.
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SQLite Concurrent Access
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If most of those concurrent accesses are reads (e.g. SELECT), SQLite can handle them very well. But if you start writing concurrently, lock contention could become an issue. A lot would then depend on how fast your filesystem...
How do I join two lists in Java?
Conditions: do not modifiy the original lists; JDK only, no external libraries. Bonus points for a one-liner or a JDK 1.3 version.
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How to convert the background to transparent? [closed]
...background and the border is not part of the image]
File menu/Save Image
GIF/PNG/ICO image file formats support transparency, JPG doesn't!
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Why use symbols as hash keys in Ruby?
...ring you mention throughout your source code in it's separate entity, e.g. if you have a string "name" multiple times mentioned in your source code, Ruby needs to store these all in separate String objects, because they might change later on (that's the nature of a Ruby string).
If you use a string...
What are the differences between the urllib, urllib2, urllib3 and requests module?
In Python, what are the differences between the urllib , urllib2 , urllib3 and requests modules? Why are there three? They seem to do the same thing...
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