What is the most elegant way in javascript to convert bytes into a readable format
javascript
Solution
function byteCount (bytes, unit) {
if (bytes < (unit = unit || 1000))
return bytes + " B";
var exp = Math.floor (Math.log (bytes) / Math.log (unit));
var pre = ' ' +(unit === 1000 ? "kMGTPE" : "KMGTPE").charAt (exp - 1) + (unit === 1000 ? "" : "i") + 'B';
return (bytes / Math.pow (unit, exp)).toFixed (1) + pre;
}
[ 0, 27, 999, 1000, 1023, 1024, 1728, 110592, 7077888,
452984832, 28991029248, 1855425871872, 9223372036854775807].forEach (
function (v) { console.log (v, byteCount (v), byteCount (v, 1024)); });
/* Displays :
0 "0 B" "0 B"
27 "27 B" "27 B"
999 "999 B" "999 B"
1000 "1.0 kB" "1000 B"
1023 "1.0 kB" "1023 B"
1024 "1.0 kB" "1.0 KiB"
1728 "1.7 kB" "1.7 KiB"
110592 "110.6 kB" "108.0 KiB"
7077888 "7.1 MB" "6.8 MiB"
452984832 "453.0 MB" "432.0 MiB"
28991029248 "29.0 GB" "27.0 GiB"
1855425871872 "1.9 TB" "1.7 TiB"
9223372036854776000 "9.2 EB" "8.0 EiB" */
Note the Java version results table has an error displaying 7.1 KB instead of 7.1 MB
Problem
I found a very elegant 'humanize' converter for Java on stackoverflow which didn't use any loops. Is it possible to do the same with javascript? (e.g 1024 bytes => 1 kb)? As simple as it sounds I have done quite a search for it Incase you're wondering : Java Version