[항해14기] 온보딩 과제4 2023/03/09

1. Chapter 5-1

1)

<script>   function multiplyAll(a,b) {     let output = 1     for (i=a; i<=b; i++) {       output *= i     }   return output   }   console.log(multiplyAll(1,2))   console.log(multiplyAll(1,3)) </script>

2-1)

<script>   const max = function max(array) {     let output = array[0]     for  (const item of array) {     if (output < item) {     output = item     }  }     return output   }   console.log(max([1,2,3,4])) </script>

2-2)

<script>   const max = function max(...array) {     let output = array[0]     for (const item of array) {      if (output < item) {      output = item        }     }         return output   }   console.log(max(1,2,3,4)) </script>

2-3)

<script>   const max = function max( a, ...b) {     let output     let items          if (Array.isArray(a)) {       output = a[0]       items = a     } else if (typeof(a) === 'number') {       output = a       items = b     }     for (const item of items) {     if (output < item) {       output = item       }     }     return output   }   console.log(`max(배열) : ${max([1,2,3,4])}`)   console.log(`max(숫자,...) : ${max(1,2,3,4)}`) </script>

 

2. Chapter 5-2

1)

<script>   let numbers = [273,25,75,52,103,32,57,24,76]   numbers = numbers.filter(function (value) {     return value % 2 === 1   })   console.log(numbers) </script>
<script>   let numbers = [273,25,75,52,103,32,57,24,76]   numbers = numbers.filter(function (value) {     return value <= 100   })   console.log(numbers) </script>
<script>   let numbers = [273,25,75,52,103,32,57,24,76]   numbers = numbers.filter(function (value) {     return value % 5 === 0   })   console.log(numbers) </script>

 

2)

<script>   const array = ['사과','배','귤','바나나']   console.log('# for in 반복문')   for (const i in array) {     console.log(i)   }   console.log('#for of 반복문')   for (const i of array) {     console.log(i)   } </script>

<script>   const array = ['사과', '배', '귤','바나나']   array.forEach(function (value, index, array) {     console.log(`${index}`)   })   array.forEach(function (value, index, array) {     console.log(`${value}`)   }) </script>