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[DOC] regex breakdown for human parseble amount

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Geert Weening
2014-05-21 09:40:40 -07:00
parent b53b05496d
commit 8be08b5e73
1 changed files with 15 additions and 0 deletions
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15
src/js/ripple/amount.js
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@@ -593,6 +593,21 @@ Amount.prototype.invert = function() {
* 25.2 XRP => 25200000/XRP
* USD 100.40 => 100.4/USD/?
* 100 => 100000000/XRP
*
*
* The regular expression below matches above cases, broken down for better understanding:
*
* ^\s* // start with any amount of whitespace
* ([a-z]{3})? // optional any 3 letters
* \s* // any amount of whitespace
* (-)? // optional dash
* (\d+) // 1 or more digits
* (\.(\d*))? // optional . character with any amount of digits
* \s* // any amount of whitespace
* ([a-f0-9]{40}|[a-z0-9]{3})? // optional 40 character hex string OR 3 letters
* \s* // any amount of whitespace
* $ // end of string
*
*/
Amount.human_RE = /^\s*([a-z]{3})?\s*(-)?(\d+)(\.(\d*))?\s*([a-f0-9]{40}|[a-z0-9]{3})?\s*$/i;