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Validate phone number with JavaScript
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I like this one: /\D/gi.test(value). Everything that's not a digit, including whitespaces, dashes, etc...
– Gus
Jul 4 '19 at 1:59
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
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第17条：使用“swap技巧”出去多余的容量。
vector<Contestant>(contestants).swap(contestants);
表达式vector<Contestant>(contestants)创建一个临时的矢量，它是contestants的拷贝：这是由 vector的拷贝构造函数来完成的。然而，vector的拷贝构造函...
Synchronise ScrollView scroll positions - android
...l have to do that for ourselves.
First we need an interface.
package com.test;
public interface ScrollViewListener {
void onScrollChanged(ObservableScrollView scrollView, int x, int y, int oldx, int oldy);
}
Then we need to override the ScrollView class, to provide the ScrollViewListener ...
When is an interface with a default method initialized?
...initialization. The example as follows:
interface I {
int i = 1, ii = Test.out("ii", 2);
}
interface J extends I {
int j = Test.out("j", 3), jj = Test.out("jj", 4);
}
interface K extends J {
int k = Test.out("k", 5);
}
class Test {
public static void main(String[] args) {
Sy...
Stack Memory vs Heap Memory [duplicate]
... case of C++, the code is not run in either the stack or the heap. You can test what happens if you run out of heap memory by repeatingly calling new to allocate memory in a loop without calling delete to free it it. But make a system backup before doing this.
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Proper usage of Java -D command-line parameters
... the problem is that you've put the "-D" after the -jar. Try this:
java -Dtest="true" -jar myApplication.jar
From the command line help:
java [-options] -jar jarfile [args...]
In other words, the way you've got it at the moment will treat -Dtest="true" as one of the arguments to pass to main i...
PHP: If internet explorer 6, 7, 8 , or 9
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Some simple, stock browser testing, but it doesn't do versions like the request...
– Jake
May 9 '13 at 20:42
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SVN checkout ignore folder
...g for a way to check out the WebKit sources while excluding the regression tests. I ended up with the following:
svn checkout http://svn.webkit.org/repository/webkit/trunk WebKit \
--depth immediates
cd WebKit
find . \
-maxdepth 1 -type d \
-not -name '.*' \
-not -name '*Tests' \
-not -n...
How can I apply a function to every row/column of a matrix in MATLAB?
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I would test performance of this approach for any particular case against simple for-loop, which might be faster then converting a matrix to cell array. Use tic/tac wrap to test.
– yuk
Feb 21 '1...
java.io.Console support in Eclipse IDE
... you wouldn't want someone to be able to override the class to make a mock/testing console...
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