chphaeton

const arr1 = ['A1', 'A2', 'B1', 'B2', 'C1', 'C2', 'D1', 'D2'] let arr2 = ['A', 'B', 'C', 'D'] arr2 = arr2.map(e => e + e) const result = [...arr1, ...arr2].sort().join('--').replace(/([A-Z]){2}/g,...

for (var i = 0; i< 10; i++){ console.log(i); } 没有人这么写吗？不要打我啊

> ```js > function convert(list) { > const res = [] > const map = list.reduce((res, v) => (res[v.id] = v, res), {}) > for (const item of list) {...

a=[0,1,0,3,12] a.sort() while(!a[0]){ a.push(a.shift()) } 前提是不能全是0

for (let i = 0; i < 100000; i++) { if (''.split.call(i, '').reverse().join('') == i) console.log(i) }