type.js

export function getType(target) {

  return Object.prototype.toString.call(target).slice(8, -1)

}

export function isObject(target) {

  return getType(target) === 'Object'

}

export function isArray(target) {

  return getType(target) === 'Array'

}

export function isString(target) {

  return getType(target) === 'String'

}

export function isFunction(target) {

  return getType(target) === 'Function'

}

 

/**

 * 将substr从str中移除, 并返回新的str

 * @param {*} str

 * @param {*} substr

 * @returns

 */

export function removeSubstrFromStr(str, substr) {

  if (!isString(str)) throw new Error('参数必须为字符串')

  const index = str.indexOf(substr)

  if (index >= 0) str = str.slice(0, index)

  return str

}

/**

 * 将subobj从arr中移除

 * @param {*} arr

 * @param {*} target

 * @param {*} key

 * @returns

 */

export function removeSubItemFromArr(arr, target, key) {

  if (!isArray(arr)) throw new Error('参数必须为数组')

  const index = arr.findIndex(item => {

    if (isObject(item)) {

      return item[key] === isObject(target) ? target[key] : target

    } else if (isNumber(item) || isString(item)) {

      return item === target

    }

    return false

  })

  index > -1 && arr.splice(index, 1)