Learning Erlang

append_concat.erl

1> lists:append([[2,3,4],[5,6],[2,5,6]]).
[2,3,4,5,6,2,5,6]

2> lists:append([2,3,4],[4,5,6]).
[2,3,4,4,5,6]

3> lists:concat([an, atomic, bomb, is, big, trouble]).
"anatomicbombisbigtrouble"

4> lists:concat(["/", users, "/" , "find", "." ,"html"]).
"/users/find.html"

cons_operator.erl

1> A = [1,2,3,4].
[1,2,3,4]

2> B = [5,6|A].
[5,6,1,2,3,4]

3> C = [1,2,3|[]].
[1,2,3]

list_tuples.erl

1> A = [1,2,3,{name, last}].
2> A.
[1,2,3,{name,last}]

3> T = {name, last, age, {dog, charlie}}.
4> T.
{name,last,age,{dog,charlie}}

lists_sort.erl

1> lists:sort([a,c,d,g,e,f]).
[a,c,d,e,f,g]

2> lists:sort([2,4,3,1,5,6,0,10,9]).
[0,1,2,3,4,5,6,9,10]

3> lists:sort([2,4,3,1,5,6,0,10,9,8,7]).
[0,1,2,3,4,5,6,7,8,9,10]

4> lists:sort([$g,$d,$a,$b,$u]).
"abdgu"

5> A = a.                     
6> lists:sort([2,3,a,g,6,$d,A]).
[2,3,6,100,a,a,g]

matching_lists.erl

1> A = [1, 2, 3, 4, hello, world].
[1,2,3,4,hello,world]

2> B = A.
3> B.
[1,2,3,4,hello,world]

4> [C] = A.
** exception error: no match of right hand side value [1,2,3,4,hello,world]

5> [C|_] = A.
6> C.
1
7> _.
* 1: variable '_' is unbound

8> [H|Tail] = A.
9> H.
1
10> Tail.
[2,3,4,hello,world]

11> [D,E|T] = [1,2,45,67,[a]].
12> D.
1
13> E.
2
14> T.
[45,67,[a]]

merge_lists.erl

6> lists:merge([[1,2,3],[4,3,5],[6,2,7]]).
[1,2,3,4,3,5,6,2,7]

7> lists:merge([[1,2,3],[3,4,5],[2,6,7]]).
[1,2,2,3,3,4,5,6,7]

8> lists:merge([2,3,4,5],[3,6,7,2,8]).
[2,3,3,4,5,6,7,2,8]

9> lists:umerge([2,3,4,5],[3,6,7,2,8]).
[2,3,4,5,6,7,2,8]

10> lists:umerge([2,3,4,5],[2,3,6,7,8]).  
[2,3,4,5,6,7,8]

reverse_lists.erl

1> lists:reverse([4,5,6,atomic,7,bomb]).
[bomb,7,atomic,6,5,4]

strings.erl

1> [68,121,110,97,109,105,99].
"Dynamic"

2> Dynamic = [68,121,110,97,109,105,99].
3> Dynamic.
"Dynamic"

4> C = "Another string".
5> C.
"Another string"

6> [H|T] = C.
7> H.
65
8> T.
"nother string"

9> H = "A".
** exception error: no match of right hand side value "A"
10> H = 65.
65

11> D = "A".
12> D.
"A"
13> D = [65].
"A"

14> [$H,$e,$r,$n,$a,$n].
"Hernan"

unproper_proper_lists.erl

1> A = [1,2|3].
[1,2|3]
2> [H|T] = A.
3> T.
[2|3]
4> [H2|T2] = T.
5> T2.
3
6> [H3|T3] = T2.
** exception error: no match of right hand side value 3

1> A= [1,2|[3]].
[1,2,3]
2> [H|T] = A.
3> T.
[2,3]
4> [H2|T2] = T.
5> T2.
3
6> [H3|T3] = T2.
[3]
7> T3.
[]
 

variables.erl

1> A.
* 1: variable 'A' is unbound  %% Calling an unbound variable

2> A = 1. %% Bounding A to 1
3> A.
1

4> B = 'a name'. %% Bounding B to the 'a name' Atom
5> B.
'a name'

6> A = B. %% A and B don't match
** exception error: no match of right hand side value 'a name'

7> C = 'a name'. %% Bounding C to the 'a name' Atom
8> B = C. %% B and C do match
'a name'