迭代语句即for-of循环

fruits = ['banana','apple','peach','orange','mango','guava','water-melon'];for(const item of fruits){  console.log(item);}'banana''apple''peach''orange''mango''guava''water-melon'

- If an array if looped over in the form of array.entries(), then the result will be each element in form of an array with index : value.for(const item of fruits.entries()){  console.log(item);}[ 0, 'banana' ] [ 1, 'apple' ] [ 2, 'peach' ] [ 3, 'orange' ] [ 4, 'mango' ] [ 5, 'guava' ] [ 6, 'water-melon' ]// Transform it into a single array comprising of sub-arrays:fruits.entries(); // Object [Array Iterator] {}[...fruits.entries()]; // [ [ 0, 'banana' ], [ 1, 'apple' ], [ 2, 'peach' ], [ 3, 'orange' ], [ 4, 'mango' ], [ 5, 'guava' ], [ 6, 'water-melon' ] ]// Transform into a single array using for-of loop:-> Method 1for(const item of fruits.entries()){  console.log(`${item[0] + 1} : ${item[1]}`);}// '1 : banana' '2 : apple' '3 : peach' '4 : orange' '5 : mango' '6 : guava' '7 : water-melon'-> Method 2for(const [i,el] of fruits.entries()){  console.log(`${i + 1} : ${el}`);}// '1 : banana' '2 : apple' '3 : peach' '4 : orange' '5 : mango' '6 : guava' '7 : water-melon'