Added create map type

[MichaelS11]

No description provided.

[codecov-io]

Codecov Report

Merging #304 into master will increase coverage by <.01%.
The diff coverage is 93.02%.

@@            Coverage Diff             @@
##           master     #304      +/-   ##
==========================================
+ Coverage   91.86%   91.87%   +<.01%     
==========================================
  Files           9        9              
  Lines        2176     2215      +39     
==========================================
+ Hits         1999     2035      +36     
- Misses        115      117       +2     
- Partials       62       63       +1

Impacted Files	Coverage Δ
vm/vmExpr.go	96.32% <93.02%> (-0.4%)	⬇️

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[MichaelS11]

@mattn Good to merge

[mattn]

Should we add to the modification of README.md to clarify that anko treat map[string]interface{} and map[interface{}]interface {} separately?

[MichaelS11]

@mattn How are they treated differently? If they are, I am not aware how they are treated differently.

a = map[interface]interface {"b":"b"}; a.b // b
a = map[string]interface {"b":"b"}; a.b // b

[mattn]

Is this related on #264, isn't ?

[MichaelS11]

A little. Mostly it is for people to have basically the same syntax as Go. The only difference is that interface{} type is interface, which is not ideal but what works.

[mattn]

Thanks for your explaining.