documentcloud / documentcloud/underscore-contrib

Add _.withDefault combinator

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#166 7 comments 0 reactions 1 assignee View on GitHub

@joshuacc is already working on this.

Since Jul 31, 2014.

after modules enhancement
Dominant language
JavaScript
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Description

The _.withDefault function would accept a function as its argument, and returns a new function that transparently replaces null/undefined return values with a default value.

Example:

function getArrLength (arr) {
  if (_.isArray(arr)) return arr.length;
}

getArrLengthOrZero = _.withDefault(getArrLength, 0);

getArrLengthOrZero({});
// => 0

May need a better name for the function, though.

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