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Fastest way to count exact number of rows in a very large table?
...ECT COUNT(*) FROM TABLE_NAME will be slow when the table has lots of rows and lots of columns.
25 Answers
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How add “or” in switch statements?
...e the stated purpose is to not write duplicate code as done in your case 1 and 2.
– Gary.Ray
May 11 '09 at 15:20
Usefu...
How does the String class override the + operator?
...x = "+x;
The compiler converts "x = "+x; into a StringBuilder internally and uses .append(int) to "add" the integer to the string.
5.1.11. String Conversion
Any type may be converted to type String by string conversion.
A value x of primitive type T is first converted to a reference val...
List of standard lengths for database fields
I'm designing a database table and once again asking myself the same stupid question: How long should the firstname field be?
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Can I delete a git commit but keep the changes?
... changes on my development branch with a commit message "temporary commit" and then checkout master for the demo.
11 Answer...
How do I show the value of a #define at compile-time?
...n in the gcc online documentation.
How it works:
The preprocessor understands quoted strings and handles them differently from normal text. String concatenation is an example of this special treatment. The message pragma requires an argument that is a quoted string. When there is more than one com...
What's the best way to make a d3.js visualisation layout responsive?
...svg graphic. How do I make this responsive so on resize the graphic widths and heights are dynamic?
12 Answers
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How to develop a soft keyboard for Android? [closed]
I would like to play around with some ideas and develop a soft keyboard for Android to replace the default one.
4 Answers
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String replacement in Objective-C
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I thought the point of having NSString and an NSMutableString subclass was because an instance of NSString is unchangeable. While--like any sane person, I'd rather have ducks than strings any day--the fact that you just overwrote the contents of str just blew my m...
Easiest way to detect Internet connection on iOS?
...wever, I don't feel the simple case is well explained here. Coming from an Android and BlackBerry background, making requests through HTTPUrlConnection instantly fail if there is no connection available. This seems like completely sane behavior, and I was surprised to find NSURLConnection in iOS...