çoğaltılmış döndürme öğesini kaldırma

Question

var arr = ["Chandelier", "Big Girls Cry", "Burn the Pages", "Eye of the Needle", "Hostage", "Straight for the Knife", "Fair Game", "Elastic Heart", "Free the Animal", "Fire Meet Gasoline", "Cellophane", "Dressed In Black", "Chandelier", "Elastic Heart", "Chandelier", "Chandelier", "Elastic Heart", "Elastic Heart", "Big Girls Cry", "Big Girls Cry"]; 

$.each(arr, function(i,obj){ 
console.log(obj); 
}); 

Dizilimimin benzersiz olduğundan nasıl emin olabilirim?

Answer 1

Array#filter() ve geçici bir nesne ile.

var arr = ["Chandelier", "Big Girls Cry", "Burn the Pages", "Eye of the Needle", "Hostage", "Straight for the Knife", "Fair Game", "Elastic Heart", "Free the Animal", "Fire Meet Gasoline", "Cellophane", "Dressed In Black", "Chandelier", "Elastic Heart", "Chandelier", "Chandelier", "Elastic Heart", "Elastic Heart", "Big Girls Cry", "Big Girls Cry"], 
 
    unique = arr.filter(function (a) { 
 
     if (!this[a]) { 
 
      this[a] = true; 
 
      return true; 
 
     } 
 
    }, {});  
 
    
 
document.write('<pre>' + JSON.stringify(unique, 0, 4) + '</pre>');