您好,登錄后才能下訂單哦!
這篇文章主要介紹了JS實現(xiàn)的字符串?dāng)?shù)組去重功能小結(jié),具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
具體如下:
這里只考慮最簡單字符串的數(shù)組去重,暫不考慮,對象,函數(shù),NaN等情況,這種用正則實現(xiàn)起來就吃力不討好了。
非正則實現(xiàn):ES6實現(xiàn)
<script> let str_arr=["b","c",1,"a", 3,"v", "2","e", "6","g", "9", "arr",9, "hello",",6", "9", "1", 2, 6, "b", "c"] function unique(arr){ return [...new Set(arr)] } console.log(unique(str_arr)) </script>
運行結(jié)果:
ES5實現(xiàn)
<script> var str_arr = ["b","c",1,"a", 3,"v", "2","e", "6","g", "9", "arr",9, "hello",",6", "9", "1", 2, 6, "b", "c"] function unique(arr) { return arr.filter(function(ele, index, array) { return array.indexOf(ele) === index }) } console.log(unique(str_arr)) </script>
運行結(jié)果同上
ES3實現(xiàn)
<script> var str_arr = ["b","c",1,"a", 3,"v", "2","e", "6","g", "9", "arr",9, "hello",",6", "9", "1", 2, 6, "b", "c"] function unique(arr) { var obj = {}, array = [] for (var i = 0, len = arr.length; i < len; i++) { var key = arr[i] + typeof arr[i] if (!obj[key]) { obj[key] = true array.push(arr[i]) } } return array } console.log(unique(str_arr)) </script>
運行結(jié)果同上
用正則實現(xiàn)
<script> var str_arr = ["b","c",1,"a", 3,"v", "2","e", "6","g", "9", "arr",9, "hello",",6", "9", "1", 2, 6, "b", "c"] function unique(arr) { return arr.sort().join(",,"). replace(/(,|^)([^,]+)(,,\2)+(,|$)/g, "$1$2$4"). replace(/,,+/g, ","). replace(/,$/, ""). split(",") } console.log(unique(str_arr)) </script>
運行結(jié)果:
感謝你能夠認(rèn)真閱讀完這篇文章,希望小編分享的“JS實現(xiàn)的字符串?dāng)?shù)組去重功能小結(jié)”這篇文章對大家有幫助,同時也希望大家多多支持億速云,關(guān)注億速云行業(yè)資訊頻道,更多相關(guān)知識等著你來學(xué)習(xí)!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。