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How to use null in switch
...l throw a NullPointerException when i is null.
* Since Java 7 you can use String in switch statements.
More about switch (including example with null variable) in Oracle Docs - Switch
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Does Python have a string 'contains' substring method?
I'm looking for a string.contains or string.indexof method in Python.
10 Answers
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Iterate through every file in one directory
...puts path
end
The benefit is that you get a Pathname object instead of a string, that you can do useful stuff with and traverse further.
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CSS: Set a background color which is 50% of the width of the window
... pink;
}
Example: http://jsfiddle.net/PLfLW/1704/
The solution uses an extra fixed div that fills half the screen. Since it's fixed, it will remain in position even when your users scroll. You may have to fiddle with some z-indexes later, to make sure your other elements are above the background...
jQuery - replace all instances of a character in a string [duplicate]
...on, so that you can specify the global (g) flag:
var s = 'some+multi+word+string'.replace(/\+/g, ' ');
(I removed the $() around the string, as replace is not a jQuery method, so that won't work at all.)
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Checking if a string can be converted to float in Python
I've got some Python code that runs through a list of strings and converts them to integers or floating point numbers if possible. Doing this for integers is pretty easy
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Logical XOR operator in C++?
...!= !B implements the proper XOR in that regard.
But if you care about the extra sequence point though, neither != nor bitwise ^ is the proper way to implement XOR. One possible way to do XOR(a, b) correctly might look as follows
a ? !b : b
This is actually as close as you can get to making a hom...
#1071 - Specified key was too long; max key length is 767 bytes
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MySQL assumes worst case for the number of bytes per character in the string. For the MySQL 'utf8' encoding, that's 3 bytes per character since that encoding doesn't allow characters beyond U+FFFF. For the MySQL 'utf8mb4' encoding, it's 4 bytes per character, since that's what MySQL calls actua...
How to compare type of an object in Python?
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isinstance()
In your case, isinstance("this is a string", str) will return True.
You may also want to read this: http://www.canonical.org/~kragen/isinstance/
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Is returning null bad design? [closed]
...ing null is insane when it's used as a substitute for empty containers (or strings). That's not the common case though.
– MSalters
Aug 14 '09 at 8:17
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