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What is the purpose of Looper and how to use it?
...n AsyncTask is better for that purpose and less complex as it encapsulates all the thread managing.
– Fernando Gallego
Nov 29 '12 at 14:15
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How to get temporary folder for current user
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System.IO.Path.GetTempPath() is just a wrapper for a native call to GetTempPath(..) in Kernel32.
Have a look at http://msdn.microsoft.com/en-us/library/aa364992(VS.85).aspx
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The GetTempPath function checks for the existence of environment variables in the followi...
Check variable equality against a list of values
...an use the includes method. It's the cleanest way I've seen. (Supported by all major browsers, except IE (Polyfill is in the link)
if([1,3,12].includes(foo)) {
// ...
}
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angular ng-repeat in reverse
...le is an array before performing the reverse, or making it more lenient to allow the reversal of more things such as strings.
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Convert Pandas column containing NaNs to dtype `int`
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@jsc123 you can use the object dtype. This comes with a small health warning but for the most part works well.
– Andy Hayden
May 19 '15 at 15:16
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When is it right for a constructor to throw an exception?
...nstructor's job is to bring the object into a usable state. There are basically two schools of thought on this.
One group favors two-stage construction. The constructor merely brings the object into a sleeper state in which it refuses to do any work. There's an additional function that does the act...
object==null or null==object?
... {
The convention of putting the constant on the left side of == isn't really useful in Java since Java requires that the expression in an if evaluate to a boolean value, so unless the constant is a boolean, you'd get a compilation error either way you put the arguments. (and if it is a boolean, y...
Check if string contains only whitespace
...e OP wasn't asking to test for the empty string, but for a string that was all spaces. Your second method isn't bad though. Also, your parens surrounding the conditional aren't needed in python.
– NeilK
Jun 16 '17 at 21:00
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Covariance and contravariance real world example
... you have a method that returns an IEnumerable<Teacher>. Covariance allows you to directly use that result for the methods that take an IEnumerable<Person>, substituting a more derived type for a less derived (more generic) type. Contravariance, counter-intuitively, allows you to use a...
Pretty-Print JSON in Java
... Well I included code to parse a string into a JsonElement, usually you already have that from previous work you do with the JSON data. But I wanted to include it here to make the usage clearer.
– Ray Hulha
Feb 20 '14 at 15:01
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