介绍 let fruits =, (“Apple",,“Banana",,“Mango"];
fruits.unshift (“Orange");
console.log(水果);//,Prints [“Orange",,“Apple",,“Banana",,“Mango"],
fruits.unshift (“Guava",,“Papaya");
console.log(水果);//,Prints [“Guava",,“Papaya",,“Orange",,“Apple",,“Banana",,“Mango"] var fruits =, (“Apple",,“Banana",,“Mango"];
var moreFruits =, (“Orange",,……水果);
console.log (moreFruits);//,Prints [“Orange",,“Apple",,“Banana",,“Mango"],
var someoMoreFruits =, (“Guava",,“Papaya",,……moreFruits);
console.log (someoMoreFruits);//,Prints [“Guava",,“Papaya",,“Orange",,“Apple",,“Banana",,“Mango"],
console.log(水果);//,Prints [“Apple",,“Banana",,“Mango"] var fruits =, (“Apple",,“Banana",,“Mango"];
var moreFruits =, (“Orange");
var someoMoreFruits =, (“Guava",,“Papaya"];
var allFruits =, someoMoreFruits.concat (moreFruits,,水果);
console.log (allFruits);//,Prints [“Guava",,“Papaya",,“Orange",,“Apple",,“Banana",,“Mango"]
这篇文章主要介绍JavaScript中往数组开头添加新元素的方法有哪些,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
<强> 1. array.unshift()
<强> 2。使用展开运算符(…)
<强> 3。使用Array.concat()
我们还可以使用<代码> concat() 方法在开头连接两个(或更多)数组。
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