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Overload with different return type in Java?
...e same signature but returns a subclass of the object returned. In another words, a method in a subclass can return an object whose type is a subclass of the type returned by the method with the same signature in the superclass.
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Rails migration for change column
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@b_ayan: as far as I know, the only magical words in migration names are "add" and "remove".
– Alex Korban
May 10 '10 at 22:57
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How to get the last char of a string in PHP?
...not do what I indicated. I have restored my original code and changed the wording to make it more clear.
trim (or rtrim) will remove all whitespace, so if you do need to check for a space, tab, or other whitespace, manually replace the various line endings first:
$order = array("\r\n", "\n", "\r"...
Match two strings in one line with grep
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To search for files containing all the words in any order anywhere:
grep -ril \'action\' | xargs grep -il \'model\' | xargs grep -il \'view_type\'
The first grep kicks off a recursive search (r), ignoring case (i) and listing (printing out) the name of the file...
Any idea why I need to cast an integer literal to (int) here?
... the comments the cast to int works as intended, because it is a reserved word and therefore can't be interpreted as an identifier, which makes sense to me.
And Bringer128 found the JLS Reference 15.16.
CastExpression:
( PrimitiveType Dimsopt ) UnaryExpression
( ReferenceType ) UnaryExpr...
How can I output leading zeros in Ruby?
...in the directory, I'd like to use leading zeros in the filenames. In other words
6 Answers
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What does it mean by buffer?
I see the word "BUFFER" everywhere, but I am unable to grasp what it exactly is.
8 Answers
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android edittext onchange listener
...y two ways you can do it. How can you know the user has finished writing a word? Either on focus lost, or clicking on an "ok" button. There's no way on my mind you can know the user pressed the last character...
So call onFocusChange(View v, boolean hasFocus) or add a button and a click listener to...
Do interfaces inherit from Object class in java
... to (re)implement inherited methods. Have a look at this example. In other words, equals is already defined and inherited to the class implementing the interface.
– aioobe
Jul 2 '14 at 8:34
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Get MIME type from filename extension
..."text/xml"},
{".dlm", "text/dlm"},
{".doc", "application/msword"},
{".docm", "application/vnd.ms-word.document.macroEnabled.12"},
{".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
{".dot", "application/msword"},
{".d...