php - 使用 jquery 或 php 在数组上显示一次重复元素

Question

如何显示一次数组元素？例如

var array = ["b","c","c","a","d","e","a","d"]

show => ["a","b","c","d","e"] ?

有什么例子吗？

Answer 1

使用该array_unique()功能删除重复项和排序 - http://php.net/manual/en/function.array-unique.php

跟进该array_values()函数将消除数组索引中的空白 - http://php.net/manual/en/function.array-values.php

// initialize array
var $array = array("b","c","c","a","d","e","a","d");
// remove duplicates and sort by string value
$array = array_unique($array, SORT_STRING);
// reindex array (numeric index will have gaps where the duplicates where removed)
$array = array_values($array);
// show results
print_r($array);

在 Javascript/jQuery 中，您可以使用unique()andsort()方法

// initialize array
var array = ["b","c","c","a","d","e","a","d"];
// remove duplicate values
array.unique();
// sort remaining items
array.sort();

如果您在 Javascript 中对数字进行排序，则需要传递一个函数，因为数组默认按字典顺序排序

array.sort(function(a,b){return a - b;});

Answer 2

PHP

array_unique($array, SORT_STRING)

jQuery

array.unique()

Answer 3

在 php 中你应该使用array_uniqueandsort来对数组进行排序

$arr = array("b","c","c","a","d","e","a","d");
sort($arr);
print_r(array_unique($arr));

Answer 4

var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"];
var uniqueNames = [];
$.each(names, function(i, el){
    if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
});

来源：堆栈溢出

Answer 5

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问题问：- 如何显示一次数组元素？例如

var 数组 = ["b","c","c","a","d","e","a","d"]

显示 => ["a","b","c","d","e"] ？

有什么例子吗？

---

答案：- $arr = array("b","c","a","d","e","a","d");

$unique = array_unique($arr);//删除所有重复值

sort($unique);//排序在这里完成

回声“”；print_r($unique);//显示 show => ["a","b","c","d","e"]