javascript - 如何在 javascript/Node.js 中向数组添加数组

Question

我目前正在使用node.js进行项目，如果可以的话，请帮忙。忙着制作待办事项列表，并想将列表名称添加到 numlists，这可行吗？

rl.question("你想做什么？", function(firstAnswer){

if(firstAnswer == '1'){

    var addList = [];
    var numLists = [];
    for( i = 0; i< numlists.length; i++){

        rl.question("What is the list's name?", function(listName){
            numLists[i] = listName;
            rl.question("Do you want to add another list?", function
        }



    }

}
    else if(firstAnswer == '2'){




    }
        else if(firstAnswer == '3'){




        }

Answer 1

还有另一种简单的方法可以在 JavaScript 中连接数组:

var hege = ["Cecilie", "Lone"];
var stale = ["Emil", "Tobias", "Linus"];
var children = [...hege, ...stale];

输出将为:[ 'Cecilie', 'Lone', 'Emil', 'Tobias', 'Linus' ]

这种方法的优点是您可以在两个数组之间添加额外的项目，如下所示:

var hege = ["Cecilie", "Lone"];
var stale = ["Emil", "Tobias", "Linus"];
var children = [...hege, 'jon', ...stale, 'jeff'];

输出将是:[ 'Cecilie', 'Lone', 'jon', 'Emil', 'Tobias', 'Linus', 'jeff' ]