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How would I get a list of certain characters from a string?
Now say for example, I want to get a list of all of the letter A's from "Hello there, how are you? I'm feeling great today." Then I want to replace the A's I got to the letter C so that it would be "Hello there, how cre you? I'm feeling gceat today." Here's something I tried:
function testingFunction(s)
if type(s) == "string" then
s:split("a")
end
end
Thanks!
1 answer
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You can use string.gsub for that. First, it finds all the characters you want in the string and can replace them with another character. For example:
local str = "hallola"
str = str:gsub("a", "o")
print(str) -- will output "hollolo"
And in your case, replacing a with c, this:
function testingFunction(s)
if type(s) == "string" then
s = s:gsub("a", "c") -- replace "a" with the character you want to replace, "c" with the replacing character (the character that replaces "a")
return s -- returns s when you assign a variable to the function (e.g. local str = testingFunction("Hello there, how are you? I'm feeling great today."))
end
end
Hope this helps!
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Strings are immutable, so you are just returning the same input given with no changes. Do `return (s:gsub("a", "c"))` to return the new string. Also, use type annotations instead of a typeof check. incapaz 195 — 3y
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ok thanks for correcting krowten024nabrU 463 — 3y
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Thanks! Also, quick question @incapaz, what are type annotations and how are they used? Loot_O 42 — 3y