数组 去重

Posted 2020-10-28 赵理通

1.   var arr = [1, 1,2, 4]

            function c(arr) {
                var n = []
                var push=true;
                for(var i = 0; i < arr.length; i++) {

                    for(var j = 0; j < n.length; j++) {
                        if(arr[i] != n[j]){
                            push=true
                            break
                        }else{
                        
                        push=false
                        break
                        }

                    }
                    if(push){n.push(arr[i])}
                }
                
                return n
            }
            
            console.log(c(arr))

2.
var arr = [1, 1, 2, 4,11]

            function c(arr) {
                var n = []
                for(var i = 0; i < arr.length; i++) {

                    if(n.indexOf(arr[i]) == -1) {
                        n.push(arr[i])
                    }

                    
                }
                return n
            }