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buffer: add indexOf/lastIndexOf method #161

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buffer: add indexOf/lastIndexOf method #161

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algesten
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Expanded on @srijs code to add a Buffer.prototype.lastIndexOf. I used a strategy of divide/conquer, but since I'm a total c++ idiot, I have no idea whether there is a better way (some reverse memcmp variant?). Also I rebased both srijs and these commits against v0.12 hoping it would make it out sooner :)

Adds a `.indexOf` method to `Buffer`, which borrows semantics from
both `Array.prototype.indexOf` and `String.prototype.indexOf`.

`Buffer.prototype.indexOf` can be invoked with a Buffer, a string
or a number as the needle.  If the needle a Buffer or string, it will
find the first occurrence of this sequence of bytes.  If the needle is
a number, it will find the first occurrence of this byte.

Reviewed-by: Sam Rijs <[email protected]>
Fixes: #95
PR-URL: #160
Expanding and reusing code by Sam Rijs in commit 4dedc09 to also add a
`.lastIndexOf` method to `Buffer`.

`Buffer.prototype.lastIndexOf` takes the same arguments as its
predecessor and uses a divide-and-conquer method to find the last
occurrence of the sequence of byte.

Reviewed-by: Martin Algesten <[email protected]>
Related-To: #95
Original PR-URL: #160
PR-URL: #161
@piscisaureus piscisaureus reopened this Dec 30, 2014
@rvagg rvagg added the semver-minor PRs that contain new features and should be released in the next minor version. label Jan 23, 2015
@brendanashworth
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I have no opinion on the subject but from what I'm seeing is that #561 will supersede this PR. However, it has been indicated that there will be no .lastIndexOf() method added in that PR, so I think that is still up for grabs.

I'm unsure with how to proceed with this specific PR, as only one commit seems to be prevalent now. @algesten?

@trevnorris
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I'm really sorry. Been tied up with work, which is why I haven't finished my lastIndexOf() PR. I'll finish that this weekend and get it merged in. @algesten if you then want to replicate the same structure for lastIndexOf() and submit another PR that would be great. :)

@chrisdickinson
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Closing this in favor of #561. @algesten, if you're interested in adding lastIndexOf based on @trevnorris' code, please open another PR. Thanks!

@algesten
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Thanks @chrisdickinson I'll try to make some time to look into it.

boingoing pushed a commit to boingoing/node that referenced this pull request Apr 6, 2017
eti-p-doray pushed a commit to eti-p-doray/node that referenced this pull request Dec 5, 2023
V8 will increase the maximum TypedArray size in
https://crrev.com/c/4872536; this CL adapts the tests to allow for that.

Tests that hard-code smaller sizes or are already tested in V8 are
removed; one test is adapted to not rely on a specific limit.
# Conflicts:
#	test/parallel/test-buffer-alloc.js
#	test/parallel/test-buffer-tostring-rangeerror.js
eti-p-doray pushed a commit to eti-p-doray/node that referenced this pull request May 28, 2024
V8 will increase the maximum TypedArray size in
https://crrev.com/c/4872536; this CL adapts the tests to allow for that.

Tests that hard-code smaller sizes or are already tested in V8 are
removed; one test is adapted to not rely on a specific limit.
# Conflicts:
#	test/parallel/test-buffer-alloc.js
#	test/parallel/test-buffer-tostring-rangeerror.js
syg pushed a commit to syg/node that referenced this pull request Jun 20, 2024
V8 will increase the maximum TypedArray size in
https://crrev.com/c/4872536; this CL adapts the tests to allow for that.

Tests that hard-code smaller sizes or are already tested in V8 are
removed; one test is adapted to not rely on a specific limit.
# Conflicts:
#	test/parallel/test-buffer-alloc.js
#	test/parallel/test-buffer-tostring-rangeerror.js
eti-p-doray pushed a commit to eti-p-doray/node that referenced this pull request Aug 28, 2024
V8 will increase the maximum TypedArray size in
https://crrev.com/c/4872536; this CL adapts the tests to allow for that.

Tests that hard-code smaller sizes or are already tested in V8 are
removed; one test is adapted to not rely on a specific limit.
# Conflicts:
#	test/parallel/test-buffer-alloc.js
#	test/parallel/test-buffer-tostring-rangeerror.js
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7 participants