Tutorial by Examples: c

Overview Browsersync is a tool that allows for live file watching and browser reloading. It's available as a NPM package. Installation To install Browsersync you'll first need to have Node.js and NPM installed. For more information see the SO documentation on Installing and Running Node.js. Once...

The extension 'realurl' provides complete transformation of URLs with GET parameter in the browser, like “index.php?id=123&type=0&L=1” into a virtual path, a so called “Speaking URL” like “home/about-us/index.html” and back again. The objective is that URLs shall be as human readable as poss...

Incoming data from JavaScript is going through Subscriptions. Elm side First, we need to define an incoming port, using the following syntax: port input : (Int -> msg) -> Sub msg We can use Sub.batch if we have multiple subscriptions, this example will only contain one Subscription to in...

In this example we will calculate the squared deviance for each column in a data frame, in this case the mtcars. Option A: integer index squared_deviance <- vector("list", length(mtcars)) for (i in seq_along(mtcars)){ squared_deviance[[i]] <- (mtcars[[i]] - mean(mtcars[[i]]))^2...

To illustrate the effect of good for loop construction, we will calculate the mean of each column in four different ways: Using a poorly optimized for loop Using a well optimized for for loop Using an *apply family of functions Using the colMeans function Each of these options will be shown...

<div [class.active]="isActive"></div> <span [style.color]="'red'"></span> <p [attr.data-note]="'This is value for data-note attribute'">A lot of text here</p>

import { Component } from '@angular/core'; @Component({ selector: 'my-app', template: ` <h1>Angular 2 App</h1> <p>Component is directive with template</p> ` }) export class AppComponent { }

<div *ngFor="let item of items">{{ item.description }}</div> <span *ngIf="isVisible"></span>

import {Directive, ElementRef, Renderer} from '@angular/core'; @Directive({ selector: '[green]', }) class GreenDirective { constructor(private _elementRef: ElementRef, private _renderer: Renderer) { _renderer.setElementStyle(_elementRef.nativeElement, 'color', 'gree...

By default, ui-router encodes the slash / inside parameters. If you want to send a path in the URL, you need to define a custom parameter type. Define: module.config(['$urlMatcherFactoryProvider', function($urlMatcherFactory) { $urlMatcherFactory.type('path', { decode: function(val) { retu...

An external procedure is one which is defined outside another program unit, or by a means other than Fortran. The function contained in a file like integer function f() implicit none end function f is an external function. For external procedures, their existence may be declared by using a...

Block data program units are program units which provide initial values for objects in common blocks. These are deliberately left undocumented here, and will feature in the documentation of historic Fortran features.

#include <stdio.h> #define ARRLEN (10) int main (void) { int n[ ARRLEN ]; /* n is an array of 10 integers */ size_t i, j; /* Use size_t to address memory, that is to index arrays, as its guaranteed to be wide enough to address all of the possible availab...

A distinctive syntactic peculiarity of C is that declarations mirror the use of the declared object as it would be in a normal expression. The following set of operators with identical precedence and associativity are reused in declarators, namely: the unary * "dereference" operator wh...

git diff HEAD^ HEAD This will show the changes between the previous commit and the current commit.

Freeing memory twice is undefined behavior, e.g. int * x = malloc(sizeof(int)); *x = 9; free(x); free(x); Quote from standard(7.20.3.2. The free function of C99 ): Otherwise, if the argument does not match a pointer earlier returned by the calloc, malloc, or realloc function, or if the sp...

Using an incorrect format specifier in the first argument to printf invokes undefined behavior. For example, the code below invokes undefined behavior: long z = 'B'; printf("%c\n", z); Here is another example printf("%f\n",0); Above line of code is undefined behavior. %...

instance Monoid [a] where mempty = [] mappend = (++) Checking the Monoid laws for this instance: mempty `mappend` x = x <-> [] ++ xs = xs -- prepending an empty list is a no-op x `mappend` mempty = x <-> xs ++ [] = xs -- appending an empty list is a no-op x...

mconcat :: [a] -> a is another method of the Monoid typeclass: ghci> mconcat [Sum 1, Sum 2, Sum 3] Sum {getSum = 6} ghci> mconcat ["concat", "enate"] "concatenate" Its default definition is mconcat = foldr mappend mempty.

Numbers are monoidal in two ways: addition with 0 as the unit, and multiplication with 1 as the unit. Both are equally valid and useful in different circumstances. So rather than choose a preferred instance for numbers, there are two newtypes, Sum and Product to tag them for the different functional...