JS遍历的一些测试

<template>
<div class="container">
<span>This Test</span>
</div>
</template>
<script>
export default {
name: "Test",
data() {
return {
arr: [{
a: 111,
b: 222
}, {
c: 333,
d: 444
}]
}
},
mounted() {
console.log(this.arrfor())
console.log(this.arrforof())
this.arrfilter()
this.arrsome()
console.log(this.arrforeach())
console.log(this.arrmap())
console.log(this.arrfind())
},
methods: {
arrfor() {
var len = this.arr.length
for (var j = 0; j < len; j++) {
if (this.arr[j].a == 111) {
return ‘arrfor success‘
}
}
},
arrforof() {
for (var item of this.arr) {
if (item.a == 111) {
return ‘forof success‘
}
}
},
arrfilter() {
console.log(this.arr.filter(item => {
return item.c == 333
}))
},
arrsome() {
console.log(this.arr.some(item => {
if (item.a == 111) {
return ‘arrsome success‘
}
}))
},
arrforeach() {
this.arr.forEach(item => {
if (item.a == 111) {
return ‘arrforeach success‘
}
})
},
arrmap() {
this.arr.map(item => {
if (item.a == 111) {
return ‘map success‘
}
})
},
arrfind() {
this.arr.find((item) => {
item.a == 111
})
}
},
}
</script>
<style scoped>
</style>