javascript - 如果数组长度大于1则执行

Question

如果数组的长度大于 1，那么我希望控制台记录所需的代码，但控制台会记录 else 语句。

var hello = "Hello, ";
var arrayNames = [];

function greet(name){

if(name==null){
    console.log(hello + "my friend")
}

//Requirement UpperCase
for (var i = 0; i < name.length; i++) {
    if(name[i]===name[i].toUpperCase()){
        console.log(hello.toUpperCase() + name[i].toUpperCase())

    }

}
//Requirement last element
arrayNames.push(name)

if(arrayNames.length>1){

    var lastElement = arrayNames.pop()
    console.log(hello + arrayNames + " and " + lastElement)
}


else{
    console.log(hello + arrayNames)
}


}

greet(["James", "Garry", "JOSHUA", "steven"])

Answer 1

您正在将整个数组作为元素推送到另一个数组中。

//Requirement last element
arrayNames.push(name) //[Array[4]]

//change this to 
Array.prototype.push.apply(arrayNames, name)

// if you want to use spread operator do this
arrayNames.push(...name)