【JavaScript】网传字节跳动面试题：请实现数组两数求和
从给定的无序、不重复的数组A中，取出2个数，使其相加和为M。
输出该数组内所有满足上述条件的解的个数。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<input type="text" id="input1" />
<input type="text" id="input2" />
<input type="text" id="input3" />
<span id="show"></span>
<button onclick="calcu()">计算</button>
<script>
function calcu() {
// 请完成具体实现
var length = document.getElementById("input1").value;
var sum = document.getElementById("input2").value;
var arr = document.getElementById("input3").value.split(",");
if (length) {
length = parseInt(length, 10);
}
if (sum) {
sum = parseInt(sum, 10);
}
if (arr) {
arr = arr.map(t => parseInt(t));
}
var count = 0;
var index = 0;
arr.map((t, i) => {
if (t <= sum) {
var _result = arr.filter((t2, i2) => {
return i2 > i && (t2 + t === sum);
})
console.log(_result)
count = count + _result.length
}
})
console.log("符合条件的结果是：" + count);
document.getElementById("show").innerText = count;
return 0;
}
</script>
</body>
</html>
