JS数组方法some、every和find的使用详情

目录

• 1、some
• 2、every
• 3、find

let arr = [
    { value: "apple" },
    { value: "" },
    { value: "banana" },
    { value: "orange" },
    { value: "" },
]
let res = arr.some(item=>{
    return item.value !== ""
})
console.log(res);

if (res) {
    console.log("数组有值");
} else {
    console.log("至少输入一个值");
}

let arr2 = [
    { value: "apple" },
    { value: "" },
    { value: "banana" },
    { value: "orange" },
    { value: "er" },
]

var res2 = arr2.every(item => {
    return item.value !== ""
})
console.log(res2);

if (!res2) {
    //res2为真，则走else；为假，则走if
    console.log("输入框有空值");
} else {
    console.log("输入框没空值");
    console.log("进行下步操作");
}

let arr3 = [
    { value: "" },
    { value: "" },
    { value: "" },
    { value: "" },
    { value: "apple" },
]
var res3 = arr3.find(item => {
    return item.value !== ""
})
console.log(res3);

if (res3) {
    //res3有值，在这里进行下一步操作。
    console.log("数组中至少有一个值");
} else {
    //res3为undefined
    console.log("数组为空！");
}