method

hash

v1_8_7_72 - Show latest stable - 0 notes - Class: Float

1_8_6_287 (0)
1_8_7_72 (0)
1_8_7_330 (0)
1_9_1_378 (-26)
1_9_2_180 (0)
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10 (0)
2_2_9 (38)
2_4_6 (0)
2_5_5 (0)
2_6_3 (0)
What's this?

hash() public

Returns a hash code for this float.

/*
 * call-seq:
 *   flt.hash   => integer
 *
 * Returns a hash code for this float.
 */

static VALUE
flo_hash(num)
    VALUE num;
{
    double d;
    char *c;
    int i, hash;

    d = RFLOAT(num)->value;
    if (d == 0) d = fabs(d);
    c = (char*)&d;
    for (hash=0, i=0; i<sizeof(double);i++) {
        hash = (hash * 971) ^ (unsigned char)c[i];
    }
    if (hash < 0) hash = -hash;
    return INT2FIX(hash);
}

hash

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