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Optimized various array functions.

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Revar Desmera 2019-05-26 23:18:49 -07:00
parent f378b70151
commit 8f2b9c4ef1
1 changed files with 2 additions and 4 deletions
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6
arrays.scad
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@ -98,7 +98,6 @@ function slice(arr,st,end) = let(
// select(l, [1,3]); // Returns [4,6]
function select(list, start, end=undef) =
let(l=len(list))
(list==[])? [] :
end==undef? (
is_num(start)?
let(s=(start%l+l)%l) list[s] :
@ -203,7 +202,7 @@ function list_longest(vecs) =
// minlen = The minimum length to pad the list to.
// fill = The value to pad the list with.
function list_pad(v, minlen, fill=undef) =
let(l=len(v)) [for (i=[0:1:max(l,minlen)-1]) i<l? v[i] : fill];
concat(v,replist(fill,minlen-len(v)));
// Function: list_trim()
@ -213,7 +212,7 @@ function list_pad(v, minlen, fill=undef) =
// v = A list.
// minlen = The minimum length to pad the list to.
function list_trim(v, maxlen) =
maxlen<1? [] : [for (i=[0:1:min(len(v),maxlen)-1]) v[i]];
[for (i=[0:1:min(len(v),maxlen)-1]) v[i]];
// Function: list_fit()
@ -240,7 +239,6 @@ function list_fit(v, length, fill) =
// enumerate([[88,"a"],[76,"b"],[21,"c"]], idx=1); // Returns: [[0,"a"], [1,"b"], [2,"c"]]
// enumerate([["cat","a",12],["dog","b",10],["log","c",14]], idx=[1:2]); // Returns: [[0,"a",12], [1,"b",10], [2,"c",14]]
function enumerate(l,idx=undef) =
(l==[])? [] :
(idx==undef)?
[for (i=[0:1:len(l)-1]) [i,l[i]]] :
[for (i=[0:1:len(l)-1]) concat([i], [for (j=idx) l[i][j]])];