小编Jac*_*ack的帖子

例如,拥有字符串:

abcdefghijklmnopqrstuvwxyz

应该导致这样的事情:

badcfehgjilknmporqtsvuxwzy

我怎么去呢？

我想到了一些效率不高的东西,例如:

s = str(range(ord('a'), ord('z') + 1))
new_s = ''
for i in xrange(len(s)):
    if i != 0 and i % 2 == 0:
        new_s += '_' + s[i]
    else:
        new_s += s[i]
# Now it should result in a string such as 'ab_cd_ef_...wx_yz'
l = new_s.split('_')
for i in xrange(len(l)):
    l[i] = l[i][::-1]
result = str(l)

有没有更好的方法？某种方式更有效或更一般,所以我也可以更轻松地用3个字母去做？

我有32位程序集的问题,在linux上用NASM组装它.这是我对插入排序的实现

myInsertionSort:
push ebp
mov ebp, esp
push ebx
push esi
push edi
mov ecx, [ebp+12]   ;put len in ecx, our loop variable
mov eax, 1 ; size of one spot in array, one byte
mov ebx, 0
mov esi, [ebp+8] ; the array
loop loop_1
loop_1:
    cmp eax, ecx ; if we're done
    jge done_1 ; then done with loop
    push ecx ; we save len, because loop command decrements ecx
    mov ecx, [esi+eax] ; ecx now array[i]
    mov …