मान लीजिए हमारे पास ऐरे का ऐसा ऐरे है:
const arr = [ [ "Serta", "Black Friday" ], [ "Serta", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ] ];
हमें एक जावास्क्रिप्ट फंक्शन लिखना है जो ऐसा ऐरे ले। और फंक्शन को एक नया ऐरे वापस करना चाहिए जिसमें मूल ऐरे से सभी यूनिक सबऐरे हों।
इसके लिए कोड:
const arr = [ [ "Serta", "Black Friday" ], [ "Serta", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ], [ "Simmons", "Black Friday" ] ]; const filterCommon = arr => { const map = Object.create(null); let res = []; res = arr.filter(el => { const str = JSON.stringify(el); const bool = !map[str]; map[str] = true; return bool; }); return res; }; console.log(filterCommon(arr));आउटपुट
कंसोल में आउटपुट:
[ [ 'Serta', 'Black Friday' ], [ 'Simmons', 'Black Friday' ] ]
