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What is the difference between 'typedef' and 'using' in C++11?
...nt
// C++20 (range-based for loop initialization statements).
std::vector<int> v{1, 2, 3};
for(typedef int Foo; Foo f : v) { (void)f; }
// ^^^^^^^^^^^^^^^ init-statement
whereas an alias-declaration is not an init-statement, and may thus not be used in contexts which allows initialization s...
Delegates: Predicate vs. Action vs. Func
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Predicate: essentially Func<T, bool>; asks the question "does the specified argument satisfy the condition represented by the delegate?" Used in things like List.FindAll.
Action: Perform an action given the arguments. Very general purpose. Not use...
Setting Android Theme background color
I'm trying to modify the default background theme color, which should be easy but surprisingly I can't get it working. Please note that I want the change to be across the entire app, not just for a single activity. Here is my code:
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Combine two data frames by rows (rbind) when they have different sets of columns
... bind_rows function which I assume is more efficient than smartbind.
df1 <- data.frame(a = c(1:5), b = c(6:10))
df2 <- data.frame(a = c(11:15), b = c(16:20), c = LETTERS[1:5])
dplyr::bind_rows(df1, df2)
a b c
1 1 6 <NA>
2 2 7 <NA>
3 3 8 <NA>
4 4 9 <NA&...
Make WPF window draggable, no matter what element is clicked
... typeof (EnableDragHelper),
new PropertyMetadata(default(bool), OnLoaded));
private static void OnLoaded(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
{
var uiElement = dependencyObject as U...
How to get a index value from foreach loop in jstl
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use varStatus to get the index c:forEach varStatus properties
<c:forEach var="categoryName" items="${categoriesList}" varStatus="loop">
<li><a onclick="getCategoryIndex(${loop.index})" href="#">${categoryName}</a></li>
</c:forEach>
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How to get value of selected radio button?
...es = document.getElementsByName('rate');
var rate_value;
for(var i = 0; i < rates.length; i++){
if(rates[i].checked){
rate_value = rates[i].value;
}
}
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Animated loading image in picasso
...ect.
Steps:
progress_image.png
/res/drawable/progress_animation.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:gravity="center">
<animated-rotate xmlns:android="http://schemas.android.co...
AngularJS - how to get an ngRepeat filtered result reference
I am using an ng-repeat directive with filter like so:
6 Answers
6
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How do I execute a command and get the output of the command within C++ using POSIX?
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#include <cstdio>
#include <iostream>
#include <memory>
#include <stdexcept>
#include <string>
#include <array>
std::string exec(const char* cmd) {
std::array<char, 128> buffer;
std::s...