stride(from:to:by:)로 세기

stride가 존재하는 이유

for n in stride(from: 0, to: 10, by: 2) {
    print(n)
}

stride: from, to, by

for n in stride(from: 0, to: 5, by: 1) {
    print(n)
}

stride: from, through, by

for n in stride(from: 0, through: 10, by: 5) {
    print(n)
}

거꾸로 세기

for n in stride(from: 5, through: 1, by: -1) {
    print(n)
}

값 건너뛰기

for n in stride(from: 0, to: 20, by: 5) {
    print(n)
}

Double과 함께 사용하는 stride

for x in stride(from: 0.0, through: 1.0, by: 0.25) {
    print(x)
}

to와 through 비교

print(Array(stride(from: 1, to: 4, by: 1)))
print(Array(stride(from: 1, through: 4, by: 1)))

stride를 배열로 만들기

let evens = Array(stride(from: 0, through: 10, by: 2))
print(evens)

stride로 인덱싱하기

let items = ["a", "b", "c", "d", "e"]
for i in stride(from: 0, to: items.count, by: 2) {
    print(items[i])
}

역방향 반복

let nums = [10, 20, 30]
for i in stride(from: nums.count - 1, through: 0, by: -1) {
    print(nums[i])
}

stride의 합계 구하기

var total = 0
for n in stride(from: 0, through: 100, by: 10) {
    total += n
}
print(total)

빠른 확인

복습: stride로 세기

for n in stride(from: 0, through: 6, by: 2) { print(n) }