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Java inner class and static nested class
What is the main difference between an inner class and a static nested class in Java? Does design / implementation play a role in choosing one of these?
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How do I find a “gap” in running counter with SQL?
I'd like to find the first "gap" in a counter column in an SQL table. For example, if there are values 1,2,4 and 5 I'd like to find out 3.
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Version number comparison in Python
I want to write a cmp -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
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Throttling method calls to M requests in N seconds
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I'd use a ring buffer of timestamps with a fixed size of M. Each time the method is called, you check the oldest entry, and if it's less than N seconds in the past, you execute and add another entry, otherwise you sleep for the time differe...
What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...when seen at the top of files is used to create a namespace, i.e. a named object under which functions and variables can be created without unduly polluting the global object.
The reason why it's used is so that if you have two (or more) files:
var MY_NAMESPACE = MY_NAMESPACE || {};
MY_NAMESPACE.f...
is there a post render callback for Angular JS directive?
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If the second parameter, "delay" is not provided, the default behaviour is to execute the function after the DOM has completed rendering. So instead of setTimeout, use $timeout:
$timeout(function () {
//DOM has finished rendering
});
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Best explanation for languages without null
Every so often when programmers are complaining about null errors/exceptions someone asks what we do without null.
11 Answe...
What is the use of the @ symbol in PHP?
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Uwe Keim
35.7k3636 gold badges153153 silver badges255255 bronze badges
answered Jun 23 '09 at 12:09
RichieHindleRichieHindle
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Setting table column width
I've got a simple table that is used for an inbox as follows:
13 Answers
13
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SQL join: selecting the last records in a one-to-many relationship
Suppose I have a table of customers and a table of purchases. Each purchase belongs to one customer. I want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes?
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