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Author SHA1 Message Date
nick-w-nick
d2381ad53a Merge 295fe153ad into 77cc07a908 2025-02-08 14:24:52 -05:00
jbranchaud
77cc07a908 Add Reference Commits Earlier Than Reflog Remembers as a Git TIL 2025-02-07 22:09:28 -06:00
nick-w-nick
295fe153ad added mention of ES6 compatibility
Hello, I've added a small blockquote below the description to indicate that this method of accessing an indefinite number of function arguments has been superseded by the use of the spread operator via rest parameters for ES6+ compatibility.
2022-01-06 11:39:04 -05:00
3 changed files with 38 additions and 1 deletions

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@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
_1585 TILs and counting..._
_1586 TILs and counting..._
See some of the other learning resources I work on:
- [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -356,6 +356,7 @@ See some of the other learning resources I work on:
- [Quicker Commit Fixes With The Fixup Flag](git/quicker-commit-fixes-with-the-fixup-flag.md)
- [Rebase Commits With An Arbitrary Command](git/rebase-commits-with-an-arbitrary-command.md)
- [Reference A Commit Via Commit Message Pattern Matching](git/reference-a-commit-via-commit-message-pattern-matching.md)
- [Reference Commits Earlier Than Reflog Remembers](git/reference-commits-earlier-than-reflog-remembers.md)
- [Remove Untracked Files From A Directory](git/remove-untracked-files-from-a-directory.md)
- [Rename A Remote](git/rename-a-remote.md)
- [Renaming A Branch](git/renaming-a-branch.md)

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@@ -0,0 +1,34 @@
# Reference Commits Earlier Than Reflog Remembers
While preparing some stats for a recent blog post on [A Decade of
TILs](https://www.visualmode.dev/a-decade-of-tils), I ran into an issue
referencing chuncks of time further back than 2020.
```bash
git diff --diff-filter=A --name-only HEAD@{2016-02-06}..HEAD@{2017-02-06} -- "*.md"
warning: log for 'HEAD' only goes back to Sun, 20 Dec 2020 00:26:27 -0600
warning: log for 'HEAD' only goes back to Sun, 20 Dec 2020 00:26:27 -0600
```
This is because `HEAD@...` is a reference to the `reflog`. The `reflog` is a
local-only log of objects and activity in the repository. That date looks
suspiciously like the time that I got this specific machine and cloned the
repo.
In order to access this information, I need a different approach of finding
references that bound these points in time.
How about asking `rev-list` for the first commit it can find before the given
dates in 2017 and 2016 and then using those.
```bash
git rev-list -1 --before="2017-02-07 00:00" HEAD
17db6bc4468616786a8f597a10d252c24183d82e
git rev-list -1 --before="2016-02-07 00:00" HEAD
f1d3d1f796007662ff448d6ba0e3bbf38a2b858d
git diff --diff-filter=A --name-only f1d3d1f796007662ff448d6ba0e3bbf38a2b858d..17db6bc4468616786a8f597a10d252c24183d82e -- "*.md"
# git outputs a bunch of files ...
```

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@@ -5,6 +5,8 @@ an array-like object with all of the arguments to the function. Even if not
all of the arguments are referenced in the function signature, they can
still be accessed via the `arguments` object.
> For ES6+ compatibility, the `spread` operator used via [rest parameters](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters) is preferred over the `arugments` object when accessing an abritrary number of function arguments.
```javascript
function argTest(one) {
console.log(one);