williammalo/README.md

## README.md

      
    Raw
  

              README.md
            
          
    This is a function to calculate the appropriate unit to describe a file size.
If you want a fancier function, try this function: https://gist.github.com/2202887 by @vitronprince
Thanks to maettig for minification tips.

  
## annotated.js
function(
  a,           //number
  c            //placeholder
)
{
  for(;a>>10;c=-~c)a>>=10;           //as long the number is over 1023, divide it by 1024
                                     //a>>10 is the same as a/1024 (Thanks maettig!)
                                     //also set a counter to +1
  return a+(" kMGT"[c]||"")+"B"}    //return final number + the suffix

## index.js
function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" kMGT"[c]||"")+"B"}

Shorter version using proper unicode unit symbols:
function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" ㎅㎆㎇"[c]||"B")}

## package.json
{
  "name": "fileSizeUnits",

  "description": "Function to calculate the appropriate unit to describe a file size",

  "keywords": [
    "file",
    "size",
    "units",
    "math"
  ]
}

## test.html
<!DOCTYPE html>
<title>file Size Unit Calculator</title>
<div>Expected value: <b>269MB</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>

var fileSizeUnits = function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" kMGT"[c]||"")+"B"}
document.getElementById( "ret" ).innerHTML = fileSizeUnits(282630144)
</script>
	function(
	a, //number
	c //placeholder
	)
	{
	for(;a>>10;c=-~c)a>>=10; //as long the number is over 1023, divide it by 1024
	//a>>10 is the same as a/1024 (Thanks maettig!)
	//also set a counter to +1
	return a+(" kMGT"[c]\|\|"")+"B"} //return final number + the suffix
	function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" kMGT"[c]\|\|"")+"B"}

	Shorter version using proper unicode unit symbols:
	function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" ㎅㎆㎇"[c]\|\|"B")}
	{
	"name": "fileSizeUnits",

	"description": "Function to calculate the appropriate unit to describe a file size",

	"keywords": [
	"file",
	"size",
	"units",
	"math"
	]
	}
	<!DOCTYPE html>
	<title>file Size Unit Calculator</title>
	<div>Expected value: <b>269MB</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>

	var fileSizeUnits = function(a,c){for(;a>>10;c=-~c)a>>=10;return a+(" kMGT"[c]\|\|"")+"B"}
	document.getElementById( "ret" ).innerHTML = fileSizeUnits(282630144)
	</script>