angularjs - how to manage rounding in angular filter? -
i developing angular filter rounds of 6 decimals. cant figure out how round 2 decimals when decimals contain zeros. 1.00000 convert 1.00. filter looks like:
app.filter('customcurrency',function ($filter) { return function (amount, currencysymbol,fractionsize) { var currency = $filter('currency'); if (amount < 0) { return currency(amount, currencysymbol).replace('(', '-').replace(')', ''); } debugger; if (fractionsize !== undefined) { amount = currency(amount, currencysymbol, fractionsize); } else { amount = currency(amount, currencysymbol) } debugger; var amounts = amount.split("."); var amounthtml ; if (amounts[1].length==2 && amounts[1][0]==0 && amounts[1][1]==0) { amounthtml = amounts[0] + '<span class="decimals">.00</span>'; } else { amounthtml= amounts[0] + '<span class="decimals">.' + amounts[1] + '</span>'; } return amounthtml; }; });
not sure work out in long run i'm sure there better way go this, if want quick , dirty fix try this:
app.filter('customcurrency',function ($filter) { return function (amount, currencysymbol, fractionsize) { var currency = $filter('currency'); if (amount < 0) { return currency(amount, currencysymbol).replace('(', '-').replace(')', ''); } debugger; if (fractionsize !== undefined) { amount = currency(amount, currencysymbol, fractionsize); } else { amount = currency(amount, currencysymbol) } debugger; var amounts = amount.split("."), fractionalpart = amounts[1], decimals = fractionalpart.length, zerosfromright = countzerosfromright(fractionalpart); if(zerosfromright > 2){ return amounts[0] + '<span class="decimals">.00</span>'; } return amounts[0] + '<span class="decimals">.' + amounts[1] + '</span>'; /////////////////////////////////// function countzerosfromright(str){ var len = str.length, count = 0; while(len--){ if(str[len] === '0'){ count++; continue; } break; } return count } }; }); edit had rethink , think way better:
i've added test , maybe don't need functionality think bit more robust.
it('should remove zeros last non-zero number', function() { expect($filter('customcurrency')(1.004000, '$', 6)).toequal('$1<span class="decimals">.004</span>'); expect($filter('customcurrency')(1.4066000, '$', 6)).toequal('$1<span class="decimals">.4066</span>'); }); app.js
var app = angular.module('plunker', ['ngroute']); 'use strict'; var app = angular.module('plunker'); app.filter('customcurrency',function ($filter) { return function (amount, currencysymbol, fractionsize) { var currency = $filter('currency'); if (amount < 0) { return currency(amount, currencysymbol).replace('(', '-').replace(')', ''); } debugger; var rounded = round(amount, fractionsize), currencystring = currency(rounded, currencysymbol, fractionsize), amounts = currencystring.split("."), integerpart = amounts[0], fractionalpart = amounts[1] || false, indexlastnonzero = indexlastnonzero(fractionalpart); // if zeros after decimal remove 2 if(indexlastnonzero === -1){ return integerpart + '<span class="decimals">.00</span>'; } // if zeros , other numbers after decimal remove trailing zeros if(indexlastnonzero > 1){ return integerpart + '<span class="decimals">.' + fractionalpart.slice(0, indexlastnonzero + 1) + '</span>'; } return integerpart; ///////////////////////////////////////////// function round(str, decimals){ var num = +str; return num.tofixed(decimals); } function indexlastnonzero(str){ var len = str.length; while(len--){ if(str[len] !== '0'){ return len; } } return -1; } }; });
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