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How to work with Git branches and Rails migrations
...s and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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Changing Vim indentation behavior by file type
...h a width of 2 characters for indenting (the noexpandtab option is set globally elsewhere in my configuration).
This is described here: http://vimdoc.sourceforge.net/htmldoc/usr_05.html#05.4, scroll down to the section on filetype plugins.
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Different between parseInt() and valueOf() in java?
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Well, the API for Integer.valueOf(String) does indeed say that the String is interpreted exactly as if it were given to Integer.parseInt(String). However, valueOf(String) returns a new Integer() object whereas parseInt(String) returns a primitive int.
If yo...
How can I check if string contains characters & whitespace, not just whitespace?
What is the best way to check if a string contains only whitespace?
9 Answers
9
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How can I remove the extension of a filename in a shell script?
... cut will use the . as delimiter (also known as separator) for cutting the string into segments and by -f we select which segment we want to have in output
Then the $() command substitution will get the output and return its value
The returned value will be assigned to the variable named name
Note...
How do you compare two version Strings in Java?
...standard idiom for comparing version numbers? I can't just use a straight String compareTo because I don't know yet what the maximum number of point releases there will be. I need to compare the versions and have the following hold true:
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XPath: How to select nodes which have no attributes?
...ess Marek Czaplicki's comment and expand the answer
//node[not(@*) or not(string-length(@*))]
....will select all node elements with zero attributes OR which have attributes that are all empty. If it was just a particular attribute you are interested in, rather than all of them, then you could us...
Equivalent of varchar(max) in MySQL?
... but a varchar also includes a byte or two to encode the length of a given string. So you actually can't declare a varchar of the maximum row size, even if it's the only column in the table.
mysql> CREATE TABLE foo ( v VARCHAR(65534) );
ERROR 1118 (42000): Row size too large. The maximum row siz...
Are there any O(1/n) algorithms?
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This question isn't as stupid as it might seem. At least theoretically, something such as O(1/n) is completely sensible when we take the mathematical definition of the Big O notation:
Now you can easily substitute g(x) for 1/x … it's obvious that the above definition still holds for so...
How do I detect IE 8 with jQuery?
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It is a string, so you should do if(jQuery.browser.version.substring(0, 2) == "8.") { ... }. That way it will work with all versions of IE8.
– AndiDog
Feb 4 '10 at 19:10
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