Question

我得到了countries.json，我按照规范将其分为四列显示。

我正在寻找一种解决方案，其中数组元素均匀分布到所有四个数组。

示例JSFIDDLE https://jsfiddle.net/5tkjLs7b/

如果我从json数据中删除一个国家/地区，我将最终获得6个数组。但预计只有4个阵列。

此外，数据应均匀分布。

示例：我获得了63个项目* 4个数组+ 3个项目* 1个数组已满 country.json。

var countries = [ 
  {"name": "Afghanistan", "code": "AF"}, 
  {"name": "Åland Islands", "code": "AX"}, 
  {"name": "Albania", "code": "AL"}, 
  {"name": "Algeria", "code": "DZ"}, 
  {"name": "American Samoa", "code": "AS"}, 
  {"name": "AndorrA", "code": "AD"}, 
  {"name": "Angola", "code": "AO"}, 
  {"name": "Anguilla", "code": "AI"}, 
  {"name": "Antarctica", "code": "AQ"}, 
  {"name": "Antigua and Barbuda", "code": "AG"}, 
  {"name": "Argentina", "code": "AR"}, 
  {"name": "Armenia", "code": "AM"}];

  chunkedCountries = _.chunk(countries, countries.length/4)
  console.log(chunkedCountries);

Answer 1

您可以使用for循环和slice()来获得所需的结果。

var countries = [ 
  {"name": "Afghanistan", "code": "AF"}, 
  {"name": "Åland Islands", "code": "AX"}, 
  {"name": "Albania", "code": "AL"}, 
  {"name": "Algeria", "code": "DZ"}, 
  {"name": "American Samoa", "code": "AS"}, 
  {"name": "AndorrA", "code": "AD"}, 
  {"name": "Angola", "code": "AO"}, 
  {"name": "Anguilla", "code": "AI"}, 
  {"name": "Antarctica", "code": "AQ"}, 
  {"name": "Antigua and Barbuda", "code": "AG"}, 
  {"name": "Argentina", "code": "AR"}, 
  {"name": "Armenia", "code": "AM"}];


var c = countries.length / 4;
var result = [];

for(var i = 0; i < countries.length; i+=c) {
  result.push(countries.slice(i, i+c));
}

console.log(result)

使用lodash

1 个答案: