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| author | dawidkotlin <75385975+dawidkotlin@users.noreply.github.com> | 2021-02-19 07:59:33 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-02-19 07:59:33 +0100 |
| commit | 95664e15247d678476d64a1c81f7c19b163e823c (patch) | |
| tree | 1c76bf7ff89eaaba5fc864b97e4360cdc332c082 /lib | |
| parent | 9450bf6c08cda9b368a1b3276b570dc6ce039193 (diff) | |
| download | Nim-95664e15247d678476d64a1c81f7c19b163e823c.tar.gz | |
add example of hashing an object by all of its fields with `fields` (#16643)
* add example of hashing an object by all of its fields with `fields` * Update lib/pure/hashes.nim * Update lib/pure/hashes.nim * Update lib/pure/hashes.nim Co-authored-by: flywind <43030857+xflywind@users.noreply.github.com> Co-authored-by: Timothee Cour <timothee.cour2@gmail.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/pure/hashes.nim | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/pure/hashes.nim b/lib/pure/hashes.nim index 3cf0a8f82..54e083d25 100644 --- a/lib/pure/hashes.nim +++ b/lib/pure/hashes.nim @@ -54,6 +54,20 @@ runnableExamples: ## **Note:** If the type has a `==` operator, the following must hold: ## If two values compare equal, their hashes must also be equal. ## +## You can hash an object by all of its fields with the `fields` iterator: +runnableExamples: + proc hash(x: object): Hash = + for f in fields(x): + result = result !& hash(f) + result = !$result + + type + Obj = object + x: int + y: string + + doAssert hash(Obj(x: 520, y: "Nim")) != hash(Obj(x: 520, y: "Nim2")) + ## See also ## ======== ## * `md5 module <md5.html>`_ for the MD5 checksum algorithm |