Tutorial by Examples: ti

The function angular.isFunction determines and returns true if and only if the value passed to is a reference to a function. The function returns a reference to the now extended destination object angular.isFunction(fn) Examples var onClick = function(e) {return e}; angular.isFunction(onCli...

In javascript, assigning a non-primitive value (Such as Object, Array, Function, and many more), keeps a reference (an address in the memory) to the assigned value. Assigning a primitive value (String, Number, Boolean, or Symbol) to two different variables, and changing one, won't change both: var...

Be careful, this approach might be considered as a bad design for angular apps, since it requires programmers to remember both where functions are placed in the scope tree, and to be aware of scope inheritance. In many cases it would be preferred to inject a service (Angular practice - using scope ...

In medical imaging, spectroscopy, image processing, cryptography and other areas of science and engineering it is often the case that one wishes to compute multidimensional Fourier transforms of images. This is quite straightforward in Matlab: (multidimensional) images are just n-dimensional matrice...

Group common operations Docker builds images as a collection of layers. Each layer can only add data, even if this data says that a file has been deleted. Every instruction creates a new layer. For example: RUN apt-get -qq update RUN apt-get -qq install some-package Has a couple of downsides: ...

_mycompletion() { local command_name="$1" # not used in this example local current_word="$2" local previous_word="$3" # not used in this example # COMPREPLY is an array which has to be filled with the possible completions # compgen is used to fi...

RewriteEngine on RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(www\.)?yourdomain.com/.*$ [NC] RewriteRule \.(gif|jpg|css)$ - [F] This blocks all the links to '.gif', '.jpg' and '.css' files which are not from the domain name http://www.yourdomain.com. Display alterna...

3.0 The most simple way is to use sorted(): let words = ["Hello", "Bonjour", "Salute", "Ahola"] let sortedWords = words.sorted() print(sortedWords) // ["Ahola", "Bonjour", "Hello", "Salute"] or sort() var mutable...

import fileinput replacements = {'Search1': 'Replace1', 'Search2': 'Replace2'} for line in fileinput.input('filename.txt', inplace=True): for search_for in replacements: replace_with = replacements[search_for] line = line.replace(search_for, replace_with...

Applying a function to a collection/stream and creating a new collection/stream is called a projection. /// Projection var newReleases = [ [ "id": 70111470, "title": "Die Hard", "boxart": "http://cdn-0.nflximg.com/images...

When results need to have some logic applied 'on the fly' one can use CASE statement to implement it. SELECT CASE WHEN Col1 < 50 THEN 'under' ELSE 'over' END threshold FROM TableName also can be chained SELECT CASE WHEN Col1 < 50 THEN 'under' WHEN Col1 > 50 AND Col1 ...

Sometimes when tables are used mostly (or only) for reads, indexing does not help anymore and every little bit counts, one might use selects without LOCK to improve performance. SQL Server SELECT * FROM TableName WITH (nolock) MySQL SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;...

The method Kernel#autoload registers filename to be loaded (using Kernel::require) the first time that module (which may be a String or a symbol) is accessed. autoload :MyModule, '/usr/local/lib/modules/my_module.rb' The method Kernel#autoload? returns filename to be loaded if name is registere...

When files are not available, the require family will throw a LoadError. This is an example which illustrates loading optional modules only if they exist. module TidBits @@unavailableModules = [] [ { name: 'CoreExtend', file: 'core_extend/lib/core_extend' } \ , { name: 'Fs' ...

This function returns the floating-point remainder of the division of x/y. The returned value has the same sign as x. #include <math.h> /* for fmod() */ #include <stdio.h> /* for printf() */ int main(void) { double x = 10.0; double y = 5.1; double modulus = fmod(x,...

Python classes support properties, which look like regular object variables, but with the possibility of attaching custom behavior and documentation. class MyClass(object): def __init__(self): self._my_string = "" @property def string(self): "&...

import { Pipe, PipeTransform } from '@angular/core'; import { DatePipe } from '@angular/common' @Pipe({name: 'ifDate'}) export class IfDate implements PipeTransform { private datePipe: DatePipe = new DatePipe(); transform(value: any, pattern?:string) : any { if (typeof value === ...

Visual Studio Code is an open-source and feature-rich code editor from Microsoft. To set it up it for NativeScript development, open the Command Palette (F1 or ⌘+Shift+P) and type ext install NativeScript. Once the NativeScript extension is installed, the debugger should allow you to set breakpoint...

Named Functions defmodule Math do # one way def add(a, b) do a + b end # another way def subtract(a, b), do: a - b end iex> Math.add(2, 3) 5 :ok iex> Math.subtract(5, 2) 3 :ok Private Functions defmodule Math do def sum(a, b) do a...

Named vector can be created in several ways. With c: xc <- c('a' = 5, 'b' = 6, 'c' = 7, 'd' = 8) which results in: > xc a b c d 5 6 7 8 with list: xl <- list('a' = 5, 'b' = 6, 'c' = 7, 'd' = 8) which results in: > xl $a [1] 5 $b [1] 6 $c [1] 7 $d [1] 8 Wi...