lodash

 https://lodash.com/docs/4.17.15#pullAllBy

Object.fromEntries

Exemples

const cours = { html: 12, css: 2, JS: 30 };

Object.entries(cours)

> Array [Array ["html", 12], Array ["css", 2], Array ["JS", 30]]

Object.fromEntries(Object.entries(cours))

> Object { html: 12, css: 2, JS: 30 }

En action

const cours = { html: 12, css: 2, JS: 30 };

const  choix = Object.fromEntries(

  Object.entries(cours)

  .filter(([ _, val ]) => val>10 )

);

console.log(choix); // > Object { html: 12, JS: 30 }

En action

const words = ["Beau", "cool", "Ange", "Ananas", "ballon"]; const alpha = words.reduce((a, x) => { const l = x[0].toUpperCase() if(!a[l]) a[l] = []; a[l].push(x); return a; }, {}); const glosaire = Object.fromEntries( Object.entries(alpha) .sort(([a] , [b]) => a<b?-1:1)); console.log(glosaire); //

• [object Object] {
    A: ["Ange", "Ananas"],
    B: ["Beau", "ballon"],
    C: ["cool"]
  }

regexp

 function normalizeDataKey(key) {

    return key.replace(/[A-Z]/g, chr => `-${chr.toLowerCase()}`);

  }

  console.log(normalizeDataKey("denisDupont")) // denis-dupont

destructuration, map

const arr = [{

    id: 1,

    name: 'bill'

  }, {

    id: 2,

    name: 'ted'

  }]

  

const result = arr.map( ({id:value,name:text}) => ({ value, text }));

  console.log(result)