在lodash/es6中搜索嵌套数组

Question

查找数组中的值并返回索引。大多数答案都是对象数组。因此，我希望搜索例如22，并将2作为找到值的索引。

这是代码笔https://codesandbox.io/s/lodash-playground-array-pzzhe

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const arr = [["a","b"],["f","r"],["r",22,"t"]];
console.log("arr", arr);

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Answer 1

您可以在Array#findIndex和Array#includes中使用普通的Javascript。

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var array = [["a", "b"], ["f", "r"], ["r", 22, "t"]],
    value = 22,
    index  = array.findIndex(a => a.includes(value));
    
console.log(index);

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Answer 2

选项1使用findIndex

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const arr = [["a","b"],["f","r"],["r",22,"t"]];
console.log(arr.findIndex(a => a.includes(22)));

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选项2：使用indexOf和包括函数

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const arr = [["a","b"],["f","r"],["r",22,"t"]];
// find element
const element = arr.find(a => a.includes(22));
// find element index
const currentIndex = arr.indexOf(element)

console.log(currentIndex);

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Answer 3

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indexOfFlat = (val, array) => array.findIndex(_arr => _arr.includes(val));
const arr = [["a","b"],["f","r"],["r",22,"t"]];
console.log("arr", arr);
console.log("index", indexOfFlat(22, arr))

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.min.js"></script>

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