diff options
Diffstat (limited to 'util/array.lua')
| -rw-r--r-- | util/array.lua | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/util/array.lua b/util/array.lua index 6e5c8383..c33a5ef1 100644 --- a/util/array.lua +++ b/util/array.lua @@ -114,6 +114,40 @@ function array_base.filter(outa, ina, func) return outa; end +function array_base.slice(outa, ina, i, j) + if j == nil then + j = -1; + end + if j < 0 then + j = #ina + (j+1); + end + if i < 0 then + i = #ina + (i+1); + end + if i < 1 then + i = 1; + end + if j > #ina then + j = #ina; + end + if i > j then + for idx = 1, #outa do + outa[idx] = nil; + end + return outa; + end + + for idx = 1, 1+j-i do + outa[idx] = ina[i+(idx-1)]; + end + if ina == outa then + for idx = 2+j-i, #outa do + outa[idx] = nil; + end + end + return outa; +end + function array_base.sort(outa, ina, ...) if ina ~= outa then outa:append(ina); |