tracifyjs - Reverse engineer's tool for tracing the flow of data in JS program, based on UglifyJS

about summary refs log tree commit diff

path: root/test/compress/arrays.js

Age	Commit message (Collapse)	Author
2017-02-21	improve string concatenation	alexlamsl
	shuffle associative operations to minimise parentheses and aid other uglification efforts closes #1454
2017-02-21	fixes & improvements to [].join()	alexlamsl
	fixes - [a].join() => "" + a - ["a", , "b"].join() => "a,,b" - ["a", null, "b"].join() => "a,,b" - ["a", undefined, "b"].join() => "a,,b" improvements - ["a", "b"].join(null) => "anullb" - ["a", "b"].join(undefined) => "a,b" - [a + "b", c].join("") => a + "b" + c closes #1453
2017-01-26	update test (#1441)	Alex Lam S.L
	improved reduce_vars & binary operands produce more optimal results
2017-01-26	augment evaluate to extract within objects (#1425)	Alex Lam S.L
	- gated by `unsafe` - replaces previous optimisation specific to String.length - "123"[0] => 1 - [1, 2, 3][0] => 1 - [1, 2, 3].length => 3 - does not apply to objects with overridden prototype functions
2013-09-22	More attempts to determine when addition is associative	Mihai Bazon
	Somebody hit me with bug reports on this. :) Refs #300
2013-09-22	Actually let's move away those monsters from the evaluate function	Mihai Bazon
	ev() should do a single thing — evaluate constant expressions. if that's not possible, just return the original node. it's not the best place for partial evaluation there, instead doing it in the compress functions.
2013-09-22	More dirty handling of [ ... ].join() in unsafe mode	Mihai Bazon
	Close #300
2013-09-22	Evaluate [...].join() if possible: minor bugfix	Dan Wolff
	Follow-up to 78e98d2.
2013-09-19	When `unsafe` is set, evaluate [...].join() if possible	Mihai Bazon
	Close #298
2013-07-18	Fix output for arrays whose last element is a hole: [1,,]	David Glasser
	1529ab96 started to do this (by considering holes to be separate from "undefined") but it still converted [1,,] (length 2, last element hole, trailing comma) to [1,] (length 1, trailing comma) Unfortunately the test suite doesn't really make this clear: the new test here passes with or without this patch because run-tests.js beautifys the expected output (in "make_code"), which does the incorrect transformation! If you make some manual change to arrays.js to make the test fail and see the INPUT and OUTPUT, then you can see that without this fix, [1,,] -> [1,], and with this fix it stays [1,,].
2013-01-17	Fix output for arrays containing undefined values.	David Glasser
	1b6bcca7 was a first attempt at this. That commit made Uglify stop replacing holes with undefined, but instead it started replacing undefined with holes. This is slightly problematic, because there is a difference between a hole and an undefined value. More problematically, it changed [1,undefined] to [1,] which generally doesn't even parse as a hole (just as a trailing comma), so it didn't even preserve the length of the array! Instead, parse holes as their own special AST node which prints invisibly.