我正在寻找与PHP完全相同的Javascript:
$tags = preg_split('/+/', $_GET['q'], NULL, PREG_SPLIT_NO_EMPTY);
$p = array_unique(array_map('strtolower', $tags));
sort($p);
差不多完成了
var queryString = decodeURIComponent(location.search.substring(1)).toLowerCase();
var key = queryString.split('&')[0].split('=');
if (key.length > 1){ //q should be the only query key
var tags = key[1].split(/\+/g);
// make tags values unique, non-empty and ordered alphabetically
}
但是我正在寻找3个让标签值唯一,非空并按字母顺序排序的东西,它可以在php中轻松完成,我希望JavaScript中有这样的解决方案。
答案 0 :(得分:3)
你可以在phpjs项目中找到它:
<强>代码:强>
split
:( explode
依赖)
function split (delimiter, string) {
// http://kevin.vanzonneveld.net
// + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// - depends on: explode
// * example 1: split(' ', 'Kevin van Zonneveld');
// * returns 1: {0: 'Kevin', 1: 'van', 2: 'Zonneveld'}
return this.explode(delimiter, string);
}
array_unique
function array_unique (inputArr) {
// http://kevin.vanzonneveld.net
// + original by: Carlos R. L. Rodrigues (http://www.jsfromhell.com)
// + input by: duncan
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + bugfixed by: Nate
// + input by: Brett Zamir (http://brett-zamir.me)
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + improved by: Michael Grier
// + bugfixed by: Brett Zamir (http://brett-zamir.me)
// % note 1: The second argument, sort_flags is not implemented;
// % note 1: also should be sorted (asort?) first according to docs
// * example 1: array_unique(['Kevin','Kevin','van','Zonneveld','Kevin']);
// * returns 1: {0: 'Kevin', 2: 'van', 3: 'Zonneveld'}
// * example 2: array_unique({'a': 'green', 0: 'red', 'b': 'green', 1: 'blue', 2: 'red'});
// * returns 2: {a: 'green', 0: 'red', 1: 'blue'}
var key = '',
tmp_arr2 = {},
val = '';
var __array_search = function (needle, haystack) {
var fkey = '';
for (fkey in haystack) {
if (haystack.hasOwnProperty(fkey)) {
if ((haystack[fkey] + '') === (needle + '')) {
return fkey;
}
}
}
return false;
};
for (key in inputArr) {
if (inputArr.hasOwnProperty(key)) {
val = inputArr[key];
if (false === __array_search(val, tmp_arr2)) {
tmp_arr2[key] = val;
}
}
}
return tmp_arr2;
}
答案 1 :(得分:0)
由于我最终在这里搜索array_unique js equivalent
,我认为值得一提的是,在ES6中你可以
var unique = (value, index, array) => array.indexOf(value) === index;
[1,1,1,2,3].filter(unique);
或在一行
[1,1,1,2,3].filter((v, i, a) => a.indexOf(v) === i)