使用javascript数组中的单词组合 [英] word combination in an array using javascript

问题描述

让我们说我有一个数组['Alex'，'Sam'，'Robert']

Let's says I've an array['Alex', 'Sam', 'Robert']

我想将它们结合起来:

采用第一个array [0]并附加array [2]，这将是AlexRobert

Take first array[0] and append with array[2] which will be AlexRobert

array [0]的第一个字母是A，并附加有array [2]的是Robert，它将是ARobert

first letter of array[0] which is A and append with array[2] that is Robert which will be ARobert

以array [0]为Alex，并附加array [2]的第一个字母R为AlexR

Take array[0] which is Alex and append with first letter of array[2] that is R which will be AlexR

将第一个array [0]附加到array [1]的第一个字母以及要成为AlexSRobert的array [2]上.

Take first array[0] append with first letter of array[1] along with array[2] which will become AlexSRobert.

基本上，整个想法是当有人输入名字，中间名&姓我应该能够组合并猜测电子邮件ID.例如，Juan F. Nathaniel的数组形式将类似于['Juan'，'F'，'Nathaniel']

Basically the whole idea is when someone enter first name, middle name & last name I should be able to make combination and guess email ids. For example- Juan F. Nathaniel the array form will be like ['Juan', 'F', 'Nathaniel']

我想要名字，中间名和姓氏的组合，例如jaunn，jnathaniel，jaunfnathaniel

I want the combination of first, middle and last name like jaunn, jnathaniel, jaunfnathaniel

我是初学者，这是我写的东西:

I'm beginner and here is what I've written:

var nameCombination = function(name){

  var counting = name.split(" ");

  for (var i=0; i<counting.length; i++){
      console.log(counting[i] + counting[i+1]);
      console.log(counting[i].split("",1) + counting[i+1]);
      }

}

nameCombination('Alex Sam Robert');

推荐答案

可以使用递归方法解决此问题.

This problem can be solved using recursive approach.

var combinations = function(names, i, n){

  if(i == n){
    return [];
  }
  last_names = combinations(names, i + 1, n);

  name_combinations = last_names.map(function(last_name){ 
    return [ 
      last_name,
      names[i] + last_name,
      names[i] + last_name[0],
      names[i][0] + last_name,
      names[i][0] + last_name[0]
    ]
  });
  name_combinations = [].concat.apply([], name_combinations);
  name_combinations.push(names[i]);
  return name_combinations;
};


var nameCombinations = function(name){
  var name_array = name.split(' ');
  return Array.from(new Set(combinations(name_array, 0, name_array.length)));
};

nameCombinations('first last');

上述功能可以为给定名称生成所有所需的组合.

above function can generate all the desired combinations for a given name.

例如:nameCombinations('first last')将返回["last"，"firstlast"，"firstl"，"flast"，"fl"，"first"]].

for example: nameCombinations('first last') will return ["last", "firstlast", "firstl", "flast", "fl", "first"].

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