数据转换（数据类型转换、结构转换、数组数据处理、树形数据处理）

六哥开源前后端脚手架

• https://gitee.com/lgx1992/lg-soar

六哥npm工具库

• lg.contextmenu 右键菜单
• lg.constellation 星座工具
• lg.table-copy 表格复制
• lg.table-plus 表格增强
• lg.validator 数据校验
• lg.data 数据处理
• lg.format 格式化
• lg.cache 缓存

import {
    toObject,
    toSet,
    toMap,
    toBoolean,
    toNumber,
    toPromise,
    toOptions,
    toBooleanArray,
    toNumberArray,
    toStringArray,
    toPromiseArray,
    toAge,
    splice,
    grouping,
    sum,
    forEach,
    map,
    filter,
    find,
    sort,
    toTreeData,
    treeFlat,
    findLink,
    findLinkR,
    queryTree
} from "lg.data";

const list = [];

for (let i = 0; i < 11; i++) {
    list.push({
        value: i,
        label: String(i + 1),
        pid: -1
    })
}

for (let i = 11; i < 22; i++) {
    list.push({
        value: i,
        label: String(i + 1),
        pid: i % 5
    })
}
for (let i = 22; i < 33; i++) {
    list.push({
        value: i,
        label: String(i + 1),
        pid: 11
    })
}

console.log('toObject：转对象')
console.log(toObject(list, 'value')) // 使用字段定义key
console.log(toObject(list, (x: any) => x.value)) // 使用函数定义key
console.log(toObject(list, 'value', 'label')) // 使用字段定义key 和 value
console.log(toObject(list, (x: any) => x.value, x => x.label)) // 使用函数定义key 和 value

console.log('toSet：转Set')
console.log(toSet(list))
console.log(toSet(list, 'value')) // 使用字段定义value
console.log(toSet(list, x => x.value)) // 使用函数定义value

console.log('toMap：转Map')
console.log(toMap(list, 'value')) // 使用字段定义key
console.log(toMap(list, x => x.value)) // 使用函数定义key
console.log(toMap(list, 'value', 'label')) // 使用字段定义key 和 value
console.log(toMap(list, x => x.value, x => x.label)) // 使用函数定义key 和 value

console.log('toOptions：转选项数组（用于下拉选择）')
console.log(toOptions('a,b,c'))
console.log(toOptions(['a', 'b', 'c']))
console.log(toOptions('a:1,b:2,c:3'))
console.log(toOptions({ a: 1, b: 2, c: 3 }))
console.log(toOptions(list))

console.log('toBoolean：转布尔值')
console.log(toBoolean(true))
console.log(toBoolean(1))
console.log(toBoolean(''))
console.log(toBoolean('false'))

console.log('toBooleanArray：转布尔值数组')
console.log(toBooleanArray([false, true]))
console.log(toBooleanArray(['false', 'true']))
console.log(toBooleanArray('false,true'))

console.log('toNumber：转数值')
console.log(toNumber('1.25'))
console.log(toNumber(1.25))

console.log('toNumberArray：转数值数组')
console.log(toNumberArray([1, 2.25]))
console.log(toNumberArray(['1', '2.25']))
console.log(toNumberArray('1,2.25'))

console.log('toPromise：转Promise')
console.log(toPromise(Promise.resolve(1.25)))
console.log(toPromise(1.25))

console.log('toPromiseArray：转 Promise 数组')
console.log(toPromiseArray(['https://gitee.com/lgx1992/lg-soar', Promise.resolve('https://gitee.com/lgx1992/lg-soar')]))

console.log('toStringArray：转字符串数组')
console.log(toStringArray([1, 2.25]))
console.log(toStringArray(['1', '2.25']))
console.log(toStringArray('1,2.25'))

console.log('toAge：日期转年龄')
console.log(toAge(new Date(1992, 3, 5)))
console.log(toAge(new Date(1992, 3, 5).getTime()))
console.log(toAge(new Date(1992, 3, 5), new Date(2025, 3, 10)))

console.log('splice：数组删除')
const ls1 = [1, 2, 3, 2, 2];
splice(ls1, 2)
console.log(ls1)

const ls2 = [1, 2, 3, 2, 2];
splice(ls2, (x: number) => x === 2)
console.log(ls2)

const ls3 = [1, 2, 3, 2, 2];
splice(ls3, (_: number, i: number) => i === 2)
console.log(ls3)

console.log('grouping：分组')
console.log(grouping(list, 'value')) // 使用字段分组
console.log(grouping(list, (x: any) => String(x.value % 2))) // 使用函数分组
console.log(grouping(list, 'value', 'label')) // 使用字段分组，并使用字段映射值
console.log(grouping(list, (x: any) => String(x.value % 2), x => x.label)) // 使用函数分组，并使用函数映射值

function add(a: string, b: string | number) {
    return String(Number(a) + Number(b))
}
console.log('sum：求和')
console.log(sum([0, '1', 2, '3'])) // 基础求和
console.log(sum(list, 'value')) // 单字段求和
console.log(sum(list, ['value', 'pid'])) // 多字段求和
console.log(sum([0, '1', 2, '3'], add)) // 自定义求和函数
console.log(sum(list, 'value', add)) // 自定义求和函数
console.log(sum(list, ['value', 'pid'], add)) // 自定义求和函数

console.log('toTreeData：数组转树')
const tree = toTreeData(list, 'value', 'pid', 'children', -1);
console.log(tree)

console.log('treeFlat：树转数组')
console.log(treeFlat(tree))

console.log('map：转换')
console.log(map(tree, (x) => {
    return {
        id: x.value,
        name: x.label,
    }
}))

console.log('filter：筛选')
console.log(filter(tree, (x) => x.value % 2 === 0))

console.log('find：查找')
console.log(find(tree, (x) => x.value === 22))

console.log('findLink：查找层级链')
console.log(findLink(tree, (x) => x.value === 22))

console.log('findLinkR：查找层级链')
console.log(findLinkR(tree, (x) => x.value === 22))

console.log('queryTree：查寻树上下节点')
console.log(queryTree(tree, (x) => x.value === 11))

console.log('sort：排序')
let cl1 = JSON.parse(JSON.stringify(tree));
sort(cl1, (a, b) => a.value - b.value)
console.log(cl1)
cl1 = JSON.parse(JSON.stringify(tree));
sort(cl1, '-value')
console.log(cl1)
cl1 = JSON.parse(JSON.stringify(tree));
sort(cl1, ['-value', 'label'])
console.log(cl1)

console.log('forEach：遍历')
let i = 1;
forEach(tree, (x) => {
    console.log(i++, x)
})