CODEWITHSUNDEEP
extjs
maecy m
maecy m

Reputation: 1397

How to use =+ in Extjs?

I am trying to sum all of the time submitted. But I don't think extjs allows the use of =+. Is there any other way I can achieve my goal?

This is what I am trying to show : console.log(time=+ time);

Upvotes: 0

Views: 43

Answers (1)

user2864740
user2864740

Reputation: 62015

ExtJS is "just" JavaScript and there is no magical mapping from =+ to "sum all of" in JavaScript. Using the presented form is equivalent to time = (0 + time) (the result of the expression is 0 + time), which is hardly useful.

Either create a loop over the "times" (it should be a sequence such as an Array!) and use a "sum" variable; or, better, use one of the JavaScript functions/libraries (including those which are available in ExtJS) that support a sum or higher-order fold/reduce function1.

(In fact, Ext.Array already has a sum.. how nice is that?)

1 The example on the MDC page for Array.reduce is a summation function, presented here with some modifications for clarity:

var times = [0,1,2,3,4];
var sum = times.reduce(function(runningSum, number){
  return runningSum + number;
}, 0);

If the items of the times sequence are not numbers, then this can be used (with the appropriately modified function) as Ext.Array.sum requires a sequence of numbers.

If older browsers must be targeted (such as IE 8 or before), use es5-shim.js and move on to more productive things.

Upvotes: 1

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