Answer 1

Answer

true
false

Analysis

new String() 返回的是对象

== 的时候，实际运行的是
String('11') == new String('11').toString();

=== 不再赘述。

不是应该String('11').toString() == new String('11')吗

Answer 2

function sortPuke(arr) {
let keyList = [];//arr对应的key
let alenList = [];
let result = [];//最终结果
let spot = true;
if (arr.length === 1) {
return arr
}
if (arr.length > 1) {
for (let index = 0; index < arr.length; index++) {
alenList.push(index)
}
while (alenList.length) {
if (alenList.length === 1) {
keyList.push(alenList.shift())
}
if (spot && alenList.length > 1) {
keyList.push(alenList.shift())
}
if (!spot && alenList.length > 1) {
alenList.push(alenList.shift())
}
spot = !spot
}
}
for (let j = 0; j < arr.length; j++) {
result[keyList[j]] = arr[j]
}
return result;
}
console.log(sortPuke([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]));
//[ 1, 12, 2, 8, 3, 11, 4, 9, 5, 13, 6, 10, 7 ]

Answer 3

这道题的前提必须是输入合法的url

Answer 4

''.padEnd(5, 0).replace(/0/g, ''.padEnd(7, 0)).length // 5 * 7 = 35
正则实现数学运算