How to change each value in JS object using Lodash

Question

I have an object like:

{ 
  home: 78,
  draw: 81,
  away: 36,
  u0_5: 16,
  o0_5: 26,
  u1_5: 10,
  o1_5: 68,
  u2_5: 48,
  o2_5: 50,
  u3_5: 29,
  o3_5: 31,
  u4_5: 50,
  o4_5: 5,
  u5_5: 68,
  o5_5: 56
}

my goal is to get new same structure object, but with each value multiplied by 100 and get the same structure.

 { 
   home: 7800,
   draw: 8100,
   away: 3600,
   ...
  }

ryeballar · Accepted Answer · 2019-03-30 11:30:20Z

2

You can use mapValues() to solve this problem, together with a callback to transform each value.

const result = _.mapValues(data, v => v * 100);

const data = { 
  home: 78,
  draw: 81,
  away: 36,
  u0_5: 16,
  o0_5: 26,
  u1_5: 10,
  o1_5: 68,
  u2_5: 48,
  o2_5: 50,
  u3_5: 29,
  o3_5: 31,
  u4_5: 50,
  o4_5: 5,
  u5_5: 68,
  o5_5: 56
};

const result = _.mapValues(data, v => v * 100);

console.log(result);

.as-console-wrapper{min-height:100%;top:0!important}

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Mar 30, 2019 at 11:30

ryeballar

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Comments

Ori Drori · Accepted Answer · 2019-03-30 12:00:44Z

1

With lodash/fp you can create a function with _.mapValues() and _.multiply() that iterates the object, and multiplies each value by 100:

const fn = _.mapValues(_.multiply(100))

const obj = {"home":78,"draw":81,"away":36,"u0_5":16,"o0_5":26,"u1_5":10,"o1_5":68,"u2_5":48,"o2_5":50,"u3_5":29,"o3_5":31,"u4_5":50,"o4_5":5,"u5_5":68,"o5_5":56}

const result = fn(obj)

console.log(result)

<script src='https://cdn.jsdelivr.net/g/lodash@4(lodash.min.js+lodash.fp.min.js)'></script>

answered Mar 30, 2019 at 12:00

Ori Drori

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Comments

Yusuf Kayikci · Accepted Answer · 2019-03-30 11:27:39Z

0

_.forEach(data, function(value, key) {
       data.key = value*100;
});

answered Mar 30, 2019 at 11:27

Yusuf Kayikci

3325 silver badges18 bronze badges

1 Comment

Alexander Over a year ago

While this code may answer the question, providing additional context regarding how and why it solves the problem would improve the answer's long-term value.

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