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Add table.keyof() (#14910)

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1F616EMO~nya 2024-08-14 00:39:50 +08:00 • committed by GitHub
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commit dc7a7a0ed9
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4 changed files with 25 additions and 1 deletions
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10
builtin/common/misc_helpers.lua
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@ -205,6 +205,16 @@ function table.indexof(list, val)
return -1
end
--------------------------------------------------------------------------------
function table.keyof(tb, val)
for k, v in pairs(tb) do
if v == val then
return k
end
end
return nil
end
--------------------------------------------------------------------------------
function string:trim()
return self:match("^%s*(.-)%s*$")

10
builtin/common/tests/misc_helpers_spec.lua
View file

@ -166,6 +166,16 @@ describe("table", function()
it("indexof()", function()
assert.equal(1, table.indexof({"foo", "bar"}, "foo"))
assert.equal(-1, table.indexof({"foo", "bar"}, "baz"))
assert.equal(-1, table.indexof({[2] = "foo", [3] = "bar"}, "foo"))
assert.equal(-1, table.indexof({[1] = "foo", [3] = "bar"}, "bar"))
end)
it("keyof()", function()
assert.equal("a", table.keyof({a = "foo", b = "bar"}, "foo"))
assert.equal(nil, table.keyof({a = "foo", b = "bar"}, "baz"))
assert.equal(1, table.keyof({"foo", "bar"}, "foo"))
assert.equal(2, table.keyof({[2] = "foo", [3] = "bar"}, "foo"))
assert.equal(3, table.keyof({[1] = "foo", [3] = "bar"}, "bar"))
end)
end)