child_process: refactor self=this in socket_list#5860
Closed
benjamingr wants to merge 1 commit intonodejs:masterfrom
Closed
child_process: refactor self=this in socket_list#5860benjamingr wants to merge 1 commit intonodejs:masterfrom
benjamingr wants to merge 1 commit intonodejs:masterfrom
Conversation
The socket list module (used by child_process) currently uses the `var self = this;` pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate. Note that the `var self = this` in the _request is intentioanlly left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case. PR-URL: Reviewed-By: Reviewed-By:
benjamingr
added
the
child_process
Contributor
|
LGTM if CI is ok: https://ci.nodejs.org/job/node-test-pull-request/2039/ |
Contributor
|
LGTM, and CI is green. |
Member
|
LGTM, CI is green |
| this.connections--; | ||
|
|
||
| if (self.connections === 0) self.emit('empty'); | ||
| if (this.connections === 0) this.emit('empty', this); |
Contributor
There was a problem hiding this comment.
Where does the passed this end up here? Seems unnecessary?
Contributor
There was a problem hiding this comment.
It gets passed to onempty() which is the empty event handler added on line 82.
There was a problem hiding this comment.
To send the context as a parameter seems ambigous. Since we are using arrow functions, why not just binding the method l.82 ? onempty.bind(this)
Member
Author
There was a problem hiding this comment.
@ludoblues bind is slow and it makes the resulting function slow too. It is also very scarcely used in Node where this pattern is very common. See http://stackoverflow.com/questions/17638305/why-is-bind-slower-than-a-closure
Member
Author
|
Landed in a6b9b55 |
benjamingr
added a commit
that referenced
this pull request
Mar 27, 2016
The socket list module (used by child_process) currently uses the `var self = this;` pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate. Note that the `var self = this` in the _request is intentioanlly left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case. PR-URL: #5860 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
evanlucas
pushed a commit
that referenced
this pull request
Mar 30, 2016
The socket list module (used by child_process) currently uses the `var self = this;` pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate. Note that the `var self = this` in the _request is intentioanlly left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case. PR-URL: #5860 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
evanlucas
pushed a commit
that referenced
this pull request
Mar 31, 2016
The socket list module (used by child_process) currently uses the `var self = this;` pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate. Note that the `var self = this` in the _request is intentioanlly left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case. PR-URL: #5860 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
MylesBorins
pushed a commit
that referenced
this pull request
Apr 8, 2016
The socket list module (used by child_process) currently uses the `var self = this;` pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate. Note that the `var self = this` in the _request is intentioanlly left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case. PR-URL: #5860 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
Merged
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
7 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Pull Request check-list
Affected core subsystem(s)
child_process
Description of change
The socket list module (used by child_process) currently uses the
var self = this;pattern for context in several places, this PR replaces this with arrow functions or passing a parameter in where appropriate.Note that the
var self = thisin the _request is intentionally left in place since it is not trivial to refactor it and the current pattern isn't bad given the use case.