kylefang/angular.js
1
0
Fork 0
mirror of https://github.com/zhigang1992/angular.js.git synced 2026-04-09 22:39:39 +08:00
Code Issues Packages Projects Releases Wiki Activity

fix(numberFilter): correctly round fractions despite floating-point arithmetics issues in JS

Browse Source 
Closes #7870
Closes #7878
This commit is contained in:
Igor Minar
2014-06-23 23:23:56 -07:00
parent ceaea861eb
commit 189cd064fe
2 changed files with 11 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/ng/filter/filters.js
View File

@@ -131,6 +131,7 @@ function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
var match = numStr.match(/([\d\.]+)e(-?)(\d+)/);
if (match && match[2] == '-' && match[3] > fractionSize + 1) {
numStr = '0';
number = 0;
} else {
formatedText = numStr;
hasExponent = true;
@@ -145,8 +146,11 @@ function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
fractionSize = Math.min(Math.max(pattern.minFrac, fractionLen), pattern.maxFrac);
}
var pow = Math.pow(10, fractionSize + 1);
number = Math.floor(number * pow + 5) / pow;
// safely round numbers in JS without hitting imprecisions of floating-point arithmetics
// inspired by:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round
number = +(Math.round(+(number.toString() + 'e' + fractionSize)).toString() + 'e' + -fractionSize);
var fraction = ('' + number).split(DECIMAL_SEP);
var whole = fraction[0];
fraction = fraction[1] || '';