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#php #webdev #howto

Convert one date format into another in PHP

@Catsndogs 

$myDateTime = DateTime::createFromFormat('Y-m-d', $dateString);
$newDateString = $myDateTime->format('m/d/Y');
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#javascript #webdev #arrays #math

Function to find the minimum value in Javascript Arrays

@bezequi 

const arrMin = arr => Math.min(...arr);
// arrMin([20, 10, 5, 10]) -> 5
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#javascript #webdev #javascript #arrays #math

Function to find maximum value in javascript array

@bezequi 

const arrMax = arr => Math.max(...arr);
// arrMax([20, 10, 5, 10]) -> 20
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#javascript #webdev #arrays #math

Get average value of items in a javascript array

@bezequi 

const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.length
// arrAvg([20, 10, 5, 10]) -> 11.25
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#html #htmltags #webdev #basics #html5

Image tag <img> to insert images

@toast-ghost 

<img 
	src="example.com/cat.png" 
    alt="Photo of a cat" 
    height="50" 
    width="100"
    longdesc="#catDetails"
 >
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#css #design #gradient #webdev

Radial Gradient in CSS

@solitaire_4_07 

.gradient {
  background-image:
    radial-gradient(
      yellow,
      #f06d06
    );
}
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#css #webdev #design #gradients

CSS Repeating Gradients to Create Stripes or Radial patterns

@solitaire_4_07 

/* Linear gradient pattern */

.repeat {
  background-image: 
    repeating-linear-gradient(
      45deg,
      yellow,
      yellow 10px,
      red 10px,
      red 20px /* determines size */
    );
}

/* Radial gradient pattern */

.repeat {
  background: 
    repeating-radial-gradient(
      circle at 0 0, 
      #eee,
      #ccc 50px
    );
}
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#python #function

Python compose function - performs right-to-left function composition

@peterents 

from functools import reduce

def compose(*fns):
  return reduce(lambda f, g: lambda *args: f(g(*args)), fns)


EXAMPLES
add5 = lambda x: x + 5
multiply = lambda x, y: x * y
multiply_and_add_5 = compose(add5, multiply)

multiply_and_add_5(5, 2) # 15
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#javascript #numbers #jsfunctions

toString() - Convert numbers to string

@goblindoom95 

var x = 123;

//OPTION 1
var y = x.toString();           

//OPTION 2
var y = (123).toString();        

//OPTION 3
var y = (100 + 23).toString();   

// value of y is 123 in all 3 cases.
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#javascript #jsfunctions #numbers

toExponential() - Round off numbers in exponential notation

@goblindoom95 

var x = 1.234;
 
var y = x.toExponential(2); 
// returns y = 1.23e+0
 
var y = x.toExponential(5);  
// returns y = 1.23450e+0
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#javascript #jsfunctions #numbers

toFixed() Method - convert number to string with fixed number of decimal places

@goblindoom95 

var x = 1.2345;

var y = x.toFixed(0);
//y equals 1;

var y = x.toFixed(2);
//y equals 1.23

var y = x.toFixed(5);
//y equals 1.23400
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#javascript #jsfunctions #numbers

The valueOf() Method - Returns number of mathematical expression or number variable

@goblindoom95 

var x = 1234;
var y = x.valueOf(); 

var y = (1234).valueOf();

var y (1000+234).valueOf();

//y equals 1234 in all 3 cases
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#javascript #jsfunctions #numbers

parseInt() Method - returns a whole number from a string

@goblindoom95 

parseInt("10");         // returns 10
parseInt("10.33");      // returns 10
parseInt("10 20 30");   // returns 10
parseInt("10 years");   // returns 10
parseInt("years 10");   // returns NaN
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#commandline #git

How to Discard all Unstaged Local Changes in git

@mishka 

git checkout -- .
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#ios #swift #swift4

Downloading image from a URL on Swift

@19sunflower91 

let url = URL(string: image.url)
let data = try? Data(contentsOf: url!) //make sure your image in this url does exist, otherwise unwrap in a if let check / try-catch
imageView.image = UIImage(data: data!)

String Magic

 @frogblog #javascript
How to Get the Domain From A URL Using Javascript Capitalize the first letter of a String Check String contains Substring Method

HTML Tags

 @toast-ghost #html
HTML Heading Tags <h1> to <h6> Image tag <img> to insert images

Things you can do with Arrays

 @mishka #javascript
Get average value of items in a javascript array How to Access Clicked Element From an Array With the Same Class Function to find the minimum value in Javascript Arrays Function to find maximum value in javascript array Get sum of all values in javascript array mongodb - How to find items using regex in Mongoose for partial text search

Gradient Backgrounds

 @solitaire_4_07 #css
Radial Gradient in CSS How to Make a Linear Gradient in CSS CSS Repeating Gradients to Create Stripes or Radial patterns

Python Functions from "30 Seconds of Code"

 @peterents #python
Python when function - to apply a function when predicate(x) is True Python compose function - performs right-to-left function composition Build a list using an iterator Python unfold function

Select HTML elements with jQuery

 @new_roman11 #html #javascript
How to Select All Elements with jQuery How to Select Specific Elements with jQuery Select Elements with Class Attribute using jQuery

Time and Dates

 @new_roman11 #javascript
How to Get Current Year in Javascript How to dynamically update your site's copyright year Display Date Objects in Shorter Format - MMM DD YYY HH:MM

Stuff you can do with Python Lists

 @mishka #python
How to list all files of a directory in Python Check if a list is empty in Python Getting the index of an item in a list containing it in Python Build a list using an iterator Python unfold function Clone or copy a list in Python

JS Methods for Numbers

 @goblindoom95 #javascript
toString() - Convert numbers to string toExponential() - Round off numbers in exponential notation toFixed() Method - convert number to string with fixed number of decimal places The valueOf() Method - Returns number of mathematical expression or number variable parseInt() Method - returns a whole number from a string

Dealing with JSON

 @mishka #javascript
Creating a JSON Object in Javascript JSON.stringify() - convert objects into JSON JSON.parse() - convert string into a JavaScript object

Changing HTML with Javascript

 @_right_away_ #html #javascript
How to change any attribute of a HTML element How to change any attribute of a HTML element innerHTML - How to get or change the inside of a HTML element

Use of Dictionary in Python

 @PinkGarden #python
Merge two dictionaries Create dictionary of months by using keywords and shorthand that prints full month name How to delete words from dictionary - by using keyword “del”

Clojure Functions

 @deku
Anonymous function syntax

Node Cookies

 @mishka
Memcached Cloud session store with express-session to preserve sessions off-server

Chrome Extension Snippets

 @faustj4r
Exclude and Include Matches for Content Scripts in Google Chrome
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