Why is the variable declared as Map and initialized as HashMap; aren't they different types?
855
What does it mean to "program to an interface"?
24637
Why can't two methods be declared with the same signature even though their return types are different?
74142
Why isn't `method=` treated the same as any other method?
62369
Iterate through a HashMap
63029
Why does the default Object.toString() include the hashcode?
66617
My java code has an obvious error. Why does it compile and run?
26768
How to retrieve all keys (or values) from a std::map and put them into a vector?
599
Is Java "pass-by-reference" or "pass-by-value"?
11511
Error: Assigning to an array from an initializer list
157906
When should I use the HashSet type?
52076
Why is an ArrayList parameter modified, but not a String parameter?
55433
Why does the definition of Array.map in Scala is "throw new Error()"
93075
Why are global and static variables initialized to their default values?
45943
JavaScript "new Array(n)" and "Array.prototype.map" weirdness
35088
Is there a difference between an Array and a List in Apex?
122890
How to initialize HashSet values by construction?
68500
hashCode() for an array of objects for use in HashMap