get URL Query params with jquery & js

// Assuming “?order=1&total=30”

While URLSearchParams is ideal, not all browsers support that API. There’s a polyfill available but if you want a tiny function for basic query string parsing, the following is a function stolen from the A-Frame VR toolkit which parses the query string to get the key’s value you’d like:

function getUrlParameter(name) {
    name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
    var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
    var results = regex.exec(location.search);
    return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
};

With the function above, you can get individual parameter values:

getUrlParameter('order'); // "1"

Converting Unicode in Python 3: from Character Code to Decimal

Given the Control Code column in the Wikipedia List of Unicode Characters:

 

Example 1: The Cent character

Code Glyph Decimal Description
U+0041 A 65 Latin Capital letter A

> Python Prompt:

> code = ‘0041’
>>> decimal = int(code,16)
>>> decimal
65
>>> chr(decimal)
‘A’

Example 2: The Cent character

Code Glyph Decimal Html Description
U+00A2 ¢ 0162 ¢ Cent sign          

> Python Prompt:

> code = ’00A2′
>>> decimal = int(code,16)
>>> decimal
162
>>> chr(decimal)
‘¢’

Example 3: The Greek Sigma character

Code Glyph Decimal Description
03A3 Σ 931 Greek Capital Letter Sigma

> Python Prompt

> code = ’03A3′
>>> decimal = int(code,16)
>>> decimal
931
>>> chr(decimal)
‘Σ’

Example 4: Soccer Ball

0 1 2 3 4 5 6 7 8 9 A B C D E F
U+26Bx ⚰ ⚱ ⚲ ⚳ ⚴ ⚵ ⚶ ⚷ ⚸ ⚹ ⚺ ⚻ ⚼ ⚽ ⚾ ⚿

> Python Prompt:

> code = ’26BD’
>>> decimal = int(code,16)
>>> decimal
9917
>>> chr(decimal)
‘⚽’

Note: The Soccer ball did not display correctly in my Windows Shell, but rendered properly when I copied it into a Chrome WordPress textarea.

 

Example 5: Emoticons

1F60E 😎 smiling face with sunglasses

>>> code = ‘1F60E’
>>> decimal = int(code,16)
>>> decimal
128526
>>> chr(decimal)
‘😎’

Javascript: Audio play() Method

<!DOCTYPE html>
<html>
<body>

<audio id="myAudio">
  <source src="horse.ogg" type="audio/ogg">
  <source src="horse.mp3" type="audio/mpeg">
  Your browser does not support the audio element.
</audio>

<p>Click the buttons to play or pause the audio.</p>

<button onclick="playAudio()" type="button">Play Audio</button>
<button onclick="pauseAudio()" type="button">Pause Audio</button> 

<script>
var x = document.getElementById("myAudio"); 

function playAudio() { 
  x.play(); 
} 

function pauseAudio() { 
  x.pause(); 
} 
</script>

</body>
</html>

Punycode.js: Encode Javascript

Punycode.js is a robust Punycode converter that fully complies to RFC 3492 and RFC 5891.

This JavaScript library is the result of comparing, optimizing and documenting different open-source implementations of the Punycode algorithm:

punycode.ucs2

punycode.ucs2.decode(string)

Creates an array containing the numeric code point values of each Unicode symbol in the string. While JavaScript uses UCS-2 internally, this function will convert a pair of surrogate halves (each of which UCS-2 exposes as separate characters) into a single code point, matching UTF-16.

punycode.ucs2.decode('abc');
// → [0x61, 0x62, 0x63]
// surrogate pair for U+1D306 TETRAGRAM FOR CENTRE:
punycode.ucs2.decode('\uD834\uDF06');
// → [0x1D306]