Journal : Designing Elixir systems with OTP

Chapter 02 : Know Your Elixir Datatypes

Types and pro-cons

DataType Properties Pro Cons
Atoms are integer + constant + NOT garbage collected use = name concepts + constant tables type lookup NOT convert user-input to atom
Arrays = NOT in Elixir! - random access is cheap + traversing O(n) +
Lists NOT arrays! + singly linked-lists + pattern matching on head is O(1) Appending at END of lists or LARGE lists
Maps random access O(log n) => useful for heavily edited data use MapSet when only Keys (uniqueness)
Strings are binaries => efficiently stored + copy is a FULL copy (unlike lists) DO NOT LET processes hold references to long string => may cause memory leaks + NOT use long strings for storing info + DONT concatenate
Tuples fixed length data structure use for tagging data + read chunks of data like csv slow append => don’t edit (if need to, use Maps)
Functions send function to data, NOT data to function
PATTERN matching allows multiple dimension inheritance (sort of) => better than inheritance!!
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