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view tests/mini/bug55.d @ 1633:5c0cebff9be8
Improve array append performance.
Actually use the appropriate runtime function, instead of just
growing the array by one!
author | Christian Kamm <kamm incasoftware de> |
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date | Sun, 14 Feb 2010 10:11:05 +0100 |
parents | 1bb99290e03a |
children |
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module bug55; extern(C) int printf(char*, ...); int atoi(char[] s) { int i, fac=1; bool neg = (s.length) && (s[0] == '-'); char[] a = neg ? s[1..$] : s; foreach_reverse(c; a) { i += (c-'0') * fac; fac *= 10; } return !neg ? i : -i; } void main() { printf("64213 = %d\n", atoi("64213")); printf("-64213 = %d\n", atoi("-64213")); assert(atoi("64213") == 64213); assert(atoi("-64213") == -64213); }