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Predicate in Java
...egular expression.
This is essentially an OOP abstraction for a boolean test.
For example, you may have a helper method like this:
static boolean isEven(int num) {
return (num % 2) == 0; // simple
}
Now, given a List<Integer>, you can process only the even numbers like this:
Lis...
Why is there no xrange function in Python3?
...only 30% slower. How did the OP get 2x as slow? Well, if I repeat the same tests with 32-bit Python, I get 1.58 vs. 3.12. So my guess is that this is yet another of those cases where 3.x has been optimized for 64-bit performance in ways that hurt 32-bit.
But does it really matter? Check this out, w...
How can I pretty-print JSON using node.js?
...your filesystem with fs. Example:
var fs = require('fs');
fs.writeFile('test.json', JSON.stringify({ a:1, b:2, c:3 }, null, 4));
/* test.json:
{
"a": 1,
"b": 2,
"c": 3,
}
*/
See the JSON.stringify() docs at MDN, Node fs docs
...
How to run an application as “run as administrator” from the command prompt? [closed]
I have a batch file called test.bat . I am calling the below instructions in the test.bat file:
3 Answers
...
How to allow only one radio button to be checked?
... for all the radio buttons in a form.
i.e.,
<input type="radio" name="test" value="value1"> Value 1
<input type="radio" name="test" value="value2"> Value 2
<input type="radio" name="test" value="value3"> Value 3
Hope that would help.
...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
I successfully implemented the OpenCV square-detection example in my test application, but now need to filter the output, because it's quite messy - or is my code wrong?
...
What's the scope of the “using” declaration in C++?
...namespaces all being used by one "conglomerator"-type file, and gmock unit-testing was extra tedious because each test used things from a specific namespace, and I thought I had to qualify each and every variable. Using using inside a function (or even a gtest TEST macro!) makes my life so much bett...
jQuery scroll to element
... article Smoothly scroll to an element without a jQuery plugin. And I have tested it on the example below.
<html>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script>
$(document).ready(function (){
...
Undefined reference to pthread_create in Linux
...sing the following command (suppose the c file I want to compile is called test.c):
gcc -o test test.c -pthread
Hope it helps somebody!
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How to change the name of an iOS app?
...eps:
Note: In this example I'll change a hypothetical "Sample" name to a "Test" one.
Click twice slowly on the project root in the project navigator and then it becomes editable.
Rename the project.
After pressing 'ENTER' the assistant will suggest you to automatically change all project-na...