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HashMap get/put complexity
...choose to believe that if I hadn't had to type this on a flipping mobile phone touchscreen, I could have beaten Jon Sheet to the punch. There's a badge for that, right?
– Tom Anderson
Dec 29 '10 at 11:55
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In PHP, how do you change the key of an array element?
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Had to preserve the key order, good one, worked like a charm!
– Learner
Dec 18 '18 at 12:02
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Should I use string.isEmpty() or “”.equals(string)?
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@David dead link; here's a live one docjar.com/html/api/java/lang/String.java.html#1011
– Matt Ball
Apr 8 '12 at 14:31
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Appending a line to a file only if it does not already exist
...tected file, @drAlberT and @rubo77 's answers might not work for you since one can't sudo >>. A similarly simple solution, then, would be to use tee --append (or, on MacOS, tee -a):
LINE='include "/configs/projectname.conf"'
FILE=lighttpd.conf
grep -qF "$LINE" "$FILE" || echo "$LINE" | sudo...
Installing in Homebrew errors
... using that line right there. I had to do this myself after using the ruby one-liner at the top of the official docs to install Homebrew. Worked like a charm for me. It ought to be the only time you'll ever need to sudo with Homebrew.
I'm not sure if the ruby one-liner does this. If it did, then so...
Do interfaces inherit from Object class in java
...od of object class on interface instance
An interface implicitly declared one method for each public method in Object. Thus the equals method is implicitly declared as a member in an interface (unless it already inherits it from a superinterface).
This is explained in detail in the Java Language Sp...
Adjust UILabel height depending on the text
...ng setting the preffered width first, but I assumed that had already been done with the init of the UILabel.
– DonnaLea
Jul 6 '11 at 1:42
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Behaviour of increment and decrement operators in Python
... +, count (two unary + operators) just as easily as it could be ++, count (one unary ++ operator). It's not a significant syntactic ambiguity, but it does exist.
Simpler language. ++ is nothing more than a synonym for += 1. It was a shorthand invented because C compilers were stupid and didn't know ...
How can I find an element by CSS class with XPath?
...ion to clean up stray whitespace characters around the class name (as mentioned by @Terry):
//div[contains(concat(' ', normalize-space(@class), ' '), ' Test ')]
Note that in all these versions, the * should best be replaced by whatever element name you actually wish to match, unless you wish to ...
How to change CSS using jQuery?
... @Ender: using css() all the css is reset and only the css mentioned in this function persists. How can I only add css which is to be changed and retain previous css ?
– SimpleGuy
Sep 2 at 5:46
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