@utilslib/core/entries

---

通用的条目迭代器

• Map: [key, value]
• Set: [value, value]
• Array/Iterable: [index, value]
• Object: [key, value]

---

entries

函数签名

function entries<T, K, V>(data: Map<K, V> | Set<T> | Iterable<T> | Record<string, any>): Generator<[K | number | string | T, V | T], void, unknown>

描述

通用的条目迭代器

• Map: [key, value]
• Set: [value, value]
• Array/Iterable: [index, value]
• Object: [key, value]

类型参数

参数名	约束	默认值	描述
T	-	-	-
K	-	-	-
V	-	-	-

参数

参数名	类型	可选	默认值	描述
data	Map<K, V> | Set<T> | Iterable<T> | Record<string, any>	否	-	-

返回值

Generator<[K | number | string | T, V | T], void, unknown>

点击查看源码

js

/**
 * 通用的条目迭代器
 * - Map: [key, value]
 * - Set: [value, value]
 * - Array/Iterable: [index, value]
 * - Object: [key, value]
 */
export function* entries(data) {
  if (data instanceof Map) yield* data;
  else if (data instanceof Set) {
    for (const v of data) yield [v, v];
  } else if (typeof data[Symbol.iterator] === "function") {
    let i = 0;
    for (const v of data) yield [i++, v];
  } else if (data) {
    yield* Object.entries(data);
  }
}

ts

/**
 * 通用的条目迭代器
 * - Map: [key, value]
 * - Set: [value, value]
 * - Array/Iterable: [index, value]
 * - Object: [key, value]
 */
export function* entries<T, K, V>(
  data: Map<K, V> | Set<T> | Iterable<T> | Record<string, any>,
): Generator<[K | number | string | T, V | T], void, unknown> {
  if (data instanceof Map) yield* data;
  else if (data instanceof Set) {
    for (const v of data) yield [v, v] as [T, T];
  } else if (typeof (data as Iterable<T>)[Symbol.iterator] === "function") {
    let i = 0;
    for (const v of data as Iterable<T>) yield [i++, v] as [number, T];
  } else if (data) {
    yield* Object.entries(data) as [string, any][];
  }
}

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