S数组各种迭代方法汇总

JS数组各种迭代方法汇总

• for in
• forEach
• filter
• map
• reduce
• some
• every
• find
• findIndex

for in

      const array = [1, 2, 3, 4, 5, 6]
      for (let index = 0; index < array.length; index++) {
        const element = array[index]
        console.log(element)
      }

forEach

	  array.forEach((item, index, array) => {
        console.log(array)
      })

filter

	  array.filter((item, index, array) => {
        console.log(array)
      })

map

	  array.map((item, index, array) => {
        console.log(array)
      })

reduce

	  array.reduce((item, index, array) => {
        console.log(array)
      })

some

	  array.some((item, index, array) => {
        console.log(array)
      })

every

	  array.every((item, index, array) => {
        console.log(array)
      })

find

	  array.find((item, index, array) => {
        console.find(array)
      })

findIndex

	  array.find((item, index, array) => {
        console.find(array)
      })

来源：https://blog.csdn.net/small_ff/article/details/98726861