tangent/lume
1
0
Fork 0
mirror of https://github.com/TangentFoxy/lume.git synced 2024-11-19 07:04:24 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Added lume.invert()

Browse Source
This commit is contained in:
rxi 2014-03-08 14:45:08 +00:00
parent b4bea5f4e0
commit 8a76fd7595
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
README.md
View File

@ -115,6 +115,13 @@ an error is raised,
lume.reduce({1, 2, 3}, function(a, b) return a + b end) -- Returns 6 lume.reduce({1, 2, 3}, function(a, b) return a + b end) -- Returns 6
``` ```
### lume.invert(t)
Returns a copy of the table where the keys have become the values and the
values the keys.
```lua
lume.invert({a = "x", b = "y"}) -- returns {x = "a", y = "b"}
```
### lume.set(t [, retainkeys]) ### lume.set(t [, retainkeys])
Returns a copy of the `t` table with all the duplicate values removed. If Returns a copy of the `t` table with all the duplicate values removed. If
`retainkeys` is true the table is not treated as an array and retains its `retainkeys` is true the table is not treated as an array and retains its

7
lume.lua
View File

@ -126,6 +126,13 @@ function lume.reduce(t, fn, first)
end end
function lume.invert(t)
local rtn = {}
for k, v in pairs(t) do rtn[v] = k end
return rtn
end
function lume.set(t, retainkeys) function lume.set(t, retainkeys)
local tmp = {} local tmp = {}
for k, v in pairs(t) do tmp[v] = k end for k, v in pairs(t) do tmp[v] = k end