TextLabel text dictated by the string inside a TextBox not working?
I have a very basic 'search engine' sort of thing where inside a ScreenGUI on a model computer there is a textbox, textlabel, and textbutton.
When the button is clicked, the text in the textbox should dictate what the textlabel says.
However, for one, I can not type in the textbox, and the script just outputs what I told it to under a certain condition regardless of whether or not the text contained in the box fits that.
script.Parent.MouseButton1Click:connect(function()
if script.Parent.Parent.string.Text == "keyword" or "keywords" then
script.Parent.Parent.results.Text = "output"
else
end
end)
Does anyone know why I cant type in the textbox or why this script won't work?
1 answer
Remember that like control structures, logical operators (not, or, and) treat non-nil, non-false values as truthy. Nil and false are the only falsey values in Lua.
The issue is that since strings are not false or nil, they'll be treated as truthy in a condition context.
> "hello" or false hello > true or "hey" true > nil or "sup" sup
The or operator evaluates its two operands, and gives you the first truthy operand.
If the first expression, script.Parent.Parent.string.Text == "keyword", evaluates to false, it will evaluate to "keywords" because the relational operator == has higher precedence.
Thus it would look kinda like this
if "keywords" then end
Where "keywords" is truthy, since it's not false or nil.
How do we fix this?
Simply, compare the text directly again.
local button = script.Parent
local stringLabel = button.Parent.string
local results = button.Parent.results
-- makes code shorter
button.Activated:Connect(function()
if stringLabel.Text == "keyword" or stringLabel.Text == "keywords" then
results.Text = "output"
end
-- no else block needed
end)
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