從數組獲取唯一值

Question

var arr = ["THYROID","CARDIAC","CARDIAC,DIABETES","METABOLIC,ARTHRITIS","RENAL DISEASES,DIABETES","LIVER DISEASES,HEPATITIS","LIVER DISEASES,CANCER,METABOLIC","LIVER DISEASES,HEPATITIS,ARTHRITIS,METABOLIC"]

上面是我的代碼，我需要使用Javascript從此數組中獲取唯一值。

就像，我期望的是：如果我要求唯一值，它應該讓我：

var arr = ["THYROID","CARDIAC","DIABETES","METABOLIC","RENAL DISEASES","LIVER DISEASES,"CANCER",ARTHRITIS","HEPATITIS"]

Answer 1

如果您具有字符串數組，則可以僅使用這些字符串作為鍵來創建對象，然后從該對象獲取鍵。

創建對象

for (var t = {}, i = 0; i < arr.length; i++) 
  t[arr[i]] = 0;

從對象鍵創建數組

// Modern browsers only
arr = Object.keys(t);

// In older browsers you can use the polyfill from the link below,
// or just loop through the object like this:
arr = [];
for (var k in t)
  arr.push(k);

Object.keys