iterate over a map instead of a list
1959
How do I efficiently iterate over each entry in a Java Map?
121365
Why results of map() and list comprehension are different?
46185
How do I use Map for a function with two arguments?
7669
Map a function across a list conditionally
72455
Implementing the Iterable interface
74279
Using an sObject as a Map key
135457
How to perform Stream functions on an Iterable?
61982
How to convert a Collection to List?
24676
What is the preferred/idiomatic way to insert into a map?
76086
Why doesn't Java Map extend Collection?
32418
Is there any advantage of using map over unordered_map in case of trivial keys?
124572
EL access a map value by Integer key
115314
How do you efficiently return all of a List but one element?
138000
Get index of element in C++ map
38708
What is a use case where one would use an SObject as a Map key?
40432
MapThread with non-rectangular lists
119732
How do I iterate over a JSON structure?