Filter array of objects whose any properties contains a value

Question

I'm wondering what is the cleanest way, better way to filter an array of objects depending on a string keyword. The search has to be made in any properties of the object.

When I type lea I want to go trough all the objects and all their properties to return the objects that contain lea

When I type italy I want to go trough all the objects and all their properties to return the objects that contain italy.

I know there are lot of solutions but so far I just saw some for which you need to specify the property you want to match.

ES6 and lodash are welcome!

  const arrayOfObject = [{       name: 'Paul',       country: 'Canada',     }, {       name: 'Lea',       country: 'Italy',     }, {       name: 'John',       country: 'Italy',     }, ];      filterByValue(arrayOfObject, 'lea')   // => [{name: 'Lea',country: 'Italy'}]     filterByValue(arrayOfObject, 'ita')   // => [{name: 'Lea',country: 'Italy'}, {name: 'John',country: 'Italy'}]

Answer 1

You could filter it and search just for one occurence of the search string.

Methods used:

• Array#filter, just for filtering an array with conditions,

• Object.keys for getting all property names of the object,

• Array#some for iterating the keys and exit loop if found,

• String#toLowerCase for getting comparable values,

• String#includes for checking two string, if one contains the other.

function filterByValue(array, string) {      return array.filter(o =>          Object.keys(o).some(k => o[k].toLowerCase().includes(string.toLowerCase())));  }    const arrayOfObject = [{ name: 'Paul', country: 'Canada', }, { name: 'Lea', country: 'Italy', }, { name: 'John', country: 'Italy' }];    console.log(filterByValue(arrayOfObject, 'lea')); // [{name: 'Lea', country: 'Italy'}]  console.log(filterByValue(arrayOfObject, 'ita')); // [{name: 'Lea', country: 'Italy'}, {name: 'John', country: 'Italy'}]

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Answer 2

Well when we already know that its not going to be a search on an object with methods, we can do the following for saving bit on time complexity :

function filterByValue(array, value) {   return array.filter((data) =>  JSON.stringify(data).toLowerCase().indexOf(value.toLowerCase()) !== -1); }