함수 shuffle()

shuffle
Collections.shuffle

1 Java

String strs[] = {"a", "b", "c", "d", "e", "f", "g"};
List<String> list = Arrays.asList(strs);
Collections.shuffle(list);
for (String str : list) {
  System.out.println(str);
}

2 JavaScript

inline style

let array = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
array.sort(() => {return 0.5-Math.random()});
console.log( array );

let array = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
array.map((el, i, arr) => {
	let r = ~~(Math.random() * arr.length);
	arr[i] = arr[r];
	arr[r] = el;
	return arr;
})[0];
console.log(array);

function style

function shuffle(o){
	o.sort(() => {return 0.5-Math.random()});
	return o;
};
let array = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
console.log( shuffle(array) );

function shuffle(o){
	for(let j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
	return o;
};
let array = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
console.log( shuffle(array) );

2.1 jQuery

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
(function($){
    $.shuffle = function(arr) {
        for(var j, x, i = arr.length; i; j = parseInt(Math.random() * i), x = arr[--i], arr[i] = arr[j], arr[j] = x);
        return arr;
    }
})(jQuery);

var fruits = ["Apple", "Banana", "Orange", "Mango"];
$.shuffle(fruits);
console.log(fruits);
// ["Orange", "Mango", "Apple", "Banana"]
</script>

3 PHP

PHP shuffle() 문서를 참고하십시오.

$arr = ["Apple", "Banana", "Orange", "Mango"];
shuffle($arr);
print_r($arr);
# Array
# (
#     [0] => Mango
#     [1] => Orange
#     [2] => Apple
#     [3] => Banana
# )

4 Python

파이썬 shuffle() 문서를 참고하십시오.

import random
fruits = ["Apple", "Banana", "Orange", "Mango"]
random.shuffle(fruits)
print( fruits )
# ['Orange', 'Banana', 'Mango', 'Apple']

5 Ruby

fruits = ["Apple", "Banana", "Orange", "Mango"]
puts fruits.sort{ rand }
# Mango
# Orange
# Apple
# Banana

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