生活随笔
收集整理的這篇文章主要介紹了
js 简单的数组去重13种方法
小編覺得挺不錯的,現在分享給大家,幫大家做個參考.
js 數組去重
十幾種數組去重的方法，有的去重構思可以大致相同。
上篇的幾種數組去重
https://blog.csdn.net/weixin_47988564/article/details/106482984
var arr
= [1, 2, 3, 4, 5, 1, 2, 3, 4, 5];
var newArr
= [];for (let i
= 0; i
< arr
.length
; i
++) {if (newArr
.indexOf(arr
[i
]) == -1) newArr
.push(arr
[i
]);
}for (let i
= 0; i
< arr
.length
; i
++) {if (!newArr
.includes(arr
[i
])) newArr
.push(arr
[i
]);
}arr
.forEach((v
) => {if (newArr
.indexOf(v
) == -1) newArr
.push(v
);
});arr
.forEach((v
) => {if (!newArr
.includes(v
)) newArr
.push(v
);
});let res
= arr
.filter((v
, i
) => arr
.indexOf(v
) == i
);let res
= Array
.from(new Set(arr
));let obj
= {};
for (let i
= 0; i
< arr
.length
; i
++) {if (!obj
[arr
[i
]]) {newArr
.push(arr
[i
]);obj
[arr
[i
]] = 1;}
}let obj
= {};
arr
.forEach((v
, i
) => {if (!obj
[arr
[i
]]) {newArr
.push(v
);obj
[arr
[i
]] = 1;}
});let res
= arr
.reduce((b
, v
) => {if (b
.indexOf(v
) == -1) b
.push(v
);return b
;
}, []);arr
.forEach((v
) => {if (newArr
.indexOf(v
) == -1) newArr
.push(v
);
});let res
= arr
.reduce((b
, v
) => {if (!b
.includes(v
)) b
.push(v
);return b
;
}, []);arr
.forEach((v
) => {if (!newArr
.includes(v
)) newArr
.push(v
);
});arr
.sort();
for (let i
= 0; i
< arr
.length
; i
++) {if (arr
[i
] != arr
[i
- 1]) {newArr
.push(arr
[i
]);}
}arr
.sort();
arr
.forEach((v
, i
) => {if (arr
[i
] !== arr
[i
- 1]) {newArr
.push(v
);}
});for (let i
= 0; i
< arr
.length
; i
++) {for (let j
= i
+ 1; j
< arr
.length
; j
++) {if (arr
[i
] == arr
[j
]) {arr
.splice(j
, 1);j
--;}}
}console
.log(newArr
);
console
.log(res
);
console
.log(arr
);let str
= 'dgsadfdgfhksaghakjdjfak';
let newStr
= '';for (let i
= 0; i
< str
.length
; i
++) {if (newStr
.indexOf(str
[i
]) == -1) {newStr
+= str
[i
];}
}
for (let i
= 0; i
< str
.length
; i
++) {if (newStr
.search(str
[i
]) == -1) {newStr
+= str
[i
];}
}let obj
= {};
for (let i
= 0; i
< str
.length
; i
++) {if (!obj
[str
[i
]]) {newStr
+= str
[i
];obj
[str
[i
]] = 1;}
}console
.log(newStr
);
總結
以上是生活随笔為你收集整理的js 简单的数组去重13种方法的全部內容，希望文章能夠幫你解決所遇到的問題。
如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。
