How to use the defaultTo function from lodash

Find comprehensive JavaScript lodash.defaultTo code examples handpicked from public code repositorys.

lodash.defaultTo is a function that returns the first argument if it is not null or undefined, otherwise it returns the second argument.

phase-helper.js

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const phase = {
  id: uuid(),
  phaseId: phaseFromTemplate.phaseId,
  name: phaseDefinition.name,
  description: phaseDefinition.description,
  duration: _.defaultTo(_.get(phaseFromInput, "duration"), phaseFromTemplate.defaultDuration),
  isOpen: false,
  predecessor: phaseFromTemplate.predecessor,
  constraints: _.defaultTo(_.get(phaseFromInput, "constraints"), []),
  scheduledStartDate: undefined,

+ 19 other calls in file

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(cond({ 'a': 1, 'b': 2 })); // => 'matches A'


const constant = _.constant(1);
console.log(constant); // => 1


const defaultTo = _.defaultTo(1, 10);
console.log(defaultTo); // => 1


const flow = _.flow([function(n) { return n * 3; }, function(n) { return n + 1; }]);
console.log(flow(1)); // => 4

+ 15 other calls in file

How does lodash.defaultTo work?

lodash.defaultTo is a function that takes two arguments, a value and a default value, and returns the value if it is not null or undefined, otherwise it returns the default value. If the value is a NaN, it will return the default value as well.

ci_provider.js

GitHub: cypress-io/cypress

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// based on the existingInfo properties
// merge in the commitParams if null or undefined
// defaulting back to null if all fails
// NOTE: only properties defined in "existingInfo" will be returned
const combined = _.transform(existingInfo, (memo, value, key) => {
  return memo[key] = _.defaultTo(value || commitParamsObj[key], null)
})

debug('combined git and environment variables from provider')
debug(combined)

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+ 4 other calls in file

Ai Example

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const _ = require("lodash");

// If `value` is falsy, then it will be replaced with the default value 42.
const result1 = _.defaultTo(undefined, 42); // result1 will be 42
const result2 = _.defaultTo(null, 42); // result2 will be null
const result3 = _.defaultTo(0, 42); // result3 will be 0
const result4 = _.defaultTo(false, 42); // result4 will be false
const result5 = _.defaultTo("hello", 42); // result5 will be 'hello'

In this example, lodash.defaultTo is used to provide a default value in case the input value is falsy. The first argument is the value to check, and the second argument is the default value to use if the first argument is falsy.

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