insertion-order
There are 3 repositories under insertion-order topic.
tommyettinger/jdkgdxds
Java data structures for primitive and/or Object items
jakewhiteley/php-sets
A implementation of a Java-like Set data structure for PHP. A Set allows storage of any value without duplicates which can be iterated in insertion order.
Sajjon/identified_vec
Like HashSet but retaining INSERTION order and without `Hash` requirement on the Element type.