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Inheriting constructors
...re is a constructor inheritance using using (pun intended). For more see Wikipedia C++11 article. You write:
class A
{
public:
explicit A(int x) {}
};
class B: public A
{
using A::A;
};
This is all or nothing - you cannot inherit only some constructors, if you write this, you i...
How to make an alert dialog fill 90% of screen size?
...
According to Android platform developer Dianne Hackborn in this discussion group post, Dialogs set their Window's top level layout width and height to WRAP_CONTENT. To make the Dialog bigger, you can set those parameters to MATCH_PARENT.
Demo code:
AlertDialog.Builder...
Java Reflection Performance
...
Yes - absolutely. Looking up a class via reflection is, by magnitude, more expensive.
Quoting Java's documentation on reflection:
Because reflection involves types that are dynamically resolved, certain Java virtual machine optimizations can...
How do I get the filepath for a class in Python?
...etermine which file the class was defined in? I need something that can work from either the class C, or from an instance off C.
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vim and NERD Tree extension - adding a file
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Alan Haggai Alavi
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answered Sep 22 '09 at 14:13
innaMinnaM
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Using usort in php with a class private function
ok using usort with a function is not so complicated
5 Answers
5
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Why does “split” on an empty string return a non-empty array?
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Daniel C. SobralDaniel C. Sobral
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In Typescript, How to check if a string is Numeric
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Number('9BX9') // NaN
You can also use the unary plus operator if you like shorthand:
+'1234' // 1234
+'9BX9' // NaN
Be careful when checking against NaN (the operator === and !== don't work as expected with NaN). Use:
isNaN(maybeNumber) // returns true if NaN, otherwise false
...
Bash script absolute path with OS X
...b, but I'm not seeing anything available on the command-line. Here's a quick and dirty replacement:
#!/bin/bash
realpath() {
[[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}
realpath "$0"
This prints the path verbatim if it begins with a /. If not it must be a relative path, so i...
Change One Cell's Data in mysql
...in only one cell of a mysql table.
I have problem with UPDATE because it makes all the parameters in a column change but I want only one changed. How?
...