javascript - use lodash to lowercase internal array element - Stack Overflow

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I have this object

ob = {
 timePeriod: "Month",
 device: ["A", "B"]
}

when i use

x=_.mapValues(ob, _.method('toLowerCase'))

x is

 timePeriod: "month",
 device: undefined

it is not able to lowercase device array.

I have this object

ob = {
 timePeriod: "Month",
 device: ["A", "B"]
}

when i use

x=_.mapValues(ob, _.method('toLowerCase'))

x is

 timePeriod: "month",
 device: undefined

it is not able to lowercase device array.

• javascript
• lodash

Share Improve this question Follow asked Feb 22, 2016 at 10:37 Manish KumarManish Kumar 10.5k2626 gold badges8282 silver badges156156 bronze badges

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2 Answers 2

Sorted by: Reset to default 5

Array dont have toLowerCase function. Change to below

x = _.mapValues(ob, function(val) {
  if (typeof(val) === 'string') {
   return val.toLowerCase(); 
  }
  if (_.isArray(val)) {
    return _.map(val, _.method('toLowerCase'));
  }
});

JSON.stringify(x) // {"timePeriod":"month","device":["a","b"]}

var ob = {
    timePeriod: "Month",
    device: ["A", "B"]
}
var lowerCase = _.mapValues(ob, function(value){
    return _.isArray(value) ? _.map(value, _.toLowerCase) : _.toLowerCase(value);
})

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