no-double-unwrap.md

Unwrapping an already finished chain (no-double-unwrap)

Some Lodash and wrapper methods remove the wrapper from the chain, e.g. reduce, max or join. In these cases, the use of .value() would most likely cause an error.

Rule Details

This rule takes no arguments.

The following patterns are considered warnings:

var x = _(a).reduce(f).value();

The following patterns are not considered warnings:

var x = _(a).map(f).reduce(g);

var x = _(a).map(f).value();

var x = _.chain(a).map(f).reduce(g).value();

When Not To Use It

If you don't want to check for this possible error, or if the objects you pass to Lodash have a value, run or toJSON method.