typescript: map, reduce

그만 까먹자. // reduce example const total = [0, 1, 2, 3].reduce((a, b) => a + b); console.log("total is : " + total ); // reduce example 2 const example = [ { name:'Juna', country:'Korea' }, { name:'John', country:'USA' }, { name:'Mallisa', country:'USA' }, { name:'Genji', country:'Japan' } ] let init: { [index:string]: Array<string> } = {} const result = example.reduce((acc,cur) => { acc[cur.country] = cur.name return acc; }, init) /* result = { Korea:['Juna'], USA:['John','Mallisa'] Japan:['Genji'...

원문링크 : typescript: map, reduce