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Diffstat (limited to 'doc/string/sum.rdoc')
| -rw-r--r-- | doc/string/sum.rdoc | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/string/sum.rdoc b/doc/string/sum.rdoc new file mode 100644 index 0000000000..5de24e6402 --- /dev/null +++ b/doc/string/sum.rdoc @@ -0,0 +1,11 @@ +Returns a basic +n+-bit checksum of the characters in +self+; +the checksum is the sum of the binary value of each byte in +self+, +modulo <tt>2**n - 1</tt>: + + 'hello'.sum # => 532 + 'hello'.sum(4) # => 4 + 'hello'.sum(64) # => 532 + 'тест'.sum # => 1405 + 'こんにちは'.sum # => 2582 + +This is not a particularly strong checksum. |