本篇文章為大家總結了一些javascript遍歷陣列的幾種方法。有一定的參考價值，有需要的朋友可以參考一下，希望對大家有幫助。
有幾種方法可以遍歷數組，下面將逐一羅列！
let index = 0;
const array = [1, 2, 3, 4, 5];
while (index < array.length) {
console.log(array[index]);
index++;
}
const array = [1,2,3,4,5];
for(let index=0;index<array.length;index++){
console.log(array[index]);
}
for(let index in array){
console.log(array[index]);
}
const array=[1,2,3,4,5];
array.forEach(function(current_value,index,array){
console.log(`At index ${index} in array ${array} the value is ${current_value}`)
})
const array = [1,2,3,4,5];
const square = x =>Math.pow(x,2);
const squares = array.map(square);
console.log(`${array}`);
console.log(`${squares}`)
const array = [1,2,3,4,5];
const sum = (x,y) => x + y;
const array_sum = array.reduce(sum,0);
console.log(`the sum of arrray:${array} is ${array_sum}`);
const array = [1,2,3,4,5];
const even = x => x%2 === 0;
const even_array = array.filter(even);
console.log(`even numbers in array ${array} : ${even_array}`);
const array = [1,2,3,4,5,8];
const under_six = x => x<6;
if(array.every(under_six)){
console.log(`every elemnet in the array is less than 6`);
}
else{
console.log(`at least one element in the array was bigger than 6`);
}const array = [2,4,5,6,8];
const over_five = x => x>5;
if(array.some(over_five)){
console.log(`at least one element bigger than 5 was found`);
}
else{
console.log(`no element bigger than 5 was found`);
}以上是總結javascript中遍歷數組的幾種方法的詳細內容。更多資訊請關注PHP中文網其他相關文章！
