javascript - 为 JavaScript 数组树创建 forEach 语句

Question

首先，我想说我是 Stack Overflow 的新手，所以。如果我的问题有错误，请注意我是新手。 无论如何，所以我正在创建一个纯 JavaScript 数据库，并且我正在使用一个格式与此相同的字符串数组:

var SampleArray = [{
  "Food" : [ "banana", "Strawberry", "grapes" ],
  "Vegitables" : [ "Carrot", "Peppers" ],
  "Words" : [ "hello", "Goodbye", "Grapes" ],
  "Adjectives" : [ "Good", "First" ]
}]

希望你能理解数组部分的要点，但真正的问题是，我如何创建一个搜索框，它使用类似 forEach 语句的东西来查找数组中的某个变量，比如 "good".

注释/编辑我已将问题移至此处 How to create a search system for a tree of javascript arrays

Answer 1

根据您问题中更新的数据库格式，您可以基于以下内容实现基本搜索:

var SampleArray = [{
  "Food" : [ "banana", "Strawberry", "grapes" ],
  "Vegitables" : [ "Carrot", "Peppers" ],
  "Words" : [ "hello", "Goodbye", "Grapes" ],
  "Adjectives" : [ "Good", "First" ]
}]

function searchDatabase(query) {

  // For each object in array
  for(var object of SampleArray) {

    // Get list values of object
    var lists = Object.values(object)

    // For each list of object
    for(var list of lists) {

      // For each item of list
      for(var item of list) {

        // Look for item matching query. Locally convert to lower case to
        // avoid case sensitivity issues
        if(item.toLowerCase().indexOf(query.toLowerCase()) !== -1) {
          return object
        }
      }
    }
  }
}

console.log('search for good', searchDatabase('good') ? 'found' : 'not found')
console.log('search for bad', searchDatabase('bad') ? 'found' : 'not found')