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Ingy döt Net 2013-10-27 22:24:23 +00:00
parent 6f050a029e
commit 776bba907c
3887 changed files with 59894 additions and 7280 deletions
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25
Task/SEDOLs/D/sedols-2.d
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@ -1,25 +1,27 @@
import std.stdio, std.algorithm, std.string, std.numeric, std.ascii;
char sedolChecksum(in char[] sedol) /*pure*/ nothrow
char sedolChecksum(in char[] sedol) pure nothrow
in {
assert(sedol.length == 6, "SEDOL must be 6 chars long.");
enum uint mask = 0b11_1110_1111_1011_1110_1110_1110;
foreach (c; sedol)
assert(isDigit(c) ||
foreach (immutable c; sedol)
assert(c.isDigit ||
(c > 'A' && c <= 'Z' && ((1U << (c - 'A')) & mask)),
"SEDOL with wrong char.");
} out(result) {
assert(isDigit(result));
static int c2v(in dchar c){ return isDigit(c) ? c-'0' : c-'A'+10; }
immutable int d = sedol.map!c2v().dotProduct([1,3,1,7,3,9]);
assert(result.isDigit);
static int c2v(in dchar c) pure nothrow {
return c.isDigit ? c - '0' : c - 'A' + 10;
}
immutable int d = sedol.map!c2v.dotProduct([1, 3, 1, 7, 3, 9]);
assert((d + result - '0') % 10 == 0);
} body {
enum int[] weights = [1, 3, 1, 7, 3, 9];
int sum = 0;
foreach (i, c; sedol) {
if (isDigit(c))
foreach (immutable i, immutable c; sedol) {
if (c.isDigit)
sum += (c - '0') * weights[i];
else
sum += (c - 'A' + 10) * weights[i];
@ -29,7 +31,8 @@ in {
}
void main() {
foreach (s; ["710889", "B0YBKJ", "406566", "B0YBLH", "228276",
"B0YBKL", "557910", "B0YBKR", "585284", "B0YBKT"])
writeln(s, s.sedolChecksum());
foreach (immutable s; ["710889", "B0YBKJ", "406566", "B0YBLH",
"228276", "B0YBKL", "557910", "B0YBKR",
"585284", "B0YBKT"])
writeln(s, s.sedolChecksum);
}