util.string.gmatch

local iterator = util.string.gmatch(
    input,
    pattern
)

local text = "hello world from Lua"

for word in util.string.gmatch(text, "%a+") do
    core.engine.print("info", word)
end

--[[
Output: 
'hello'
'world'
'from'
'Lua'
]]

local data = "x=10, y=20, z=30"

for num in util.string.gmatch(data, "%d+") do
    core.engine.print("info", num)
end

--[[
Output: 
'10'
'20'
'30'
]]

local coords = "x=5 y=10 x=15 y=20"

for key, value in util.string.gmatch(coords, "(%a+)=(%d+)") do
    core.engine.print("info", key, value)
end

--[[
Output: 
'x 5'
'y 10'
'x 15'
'y 20'
]]

local csv = "apple,banana,orange"

for item in util.string.gmatch(csv, "[^,]+") do
    core.engine.print("info", item)
end

--[[
Output: 
'apple'
'banana'
'orange'
]]

local words = {}
for word in util.string.gmatch("one two three", "%S+") do
    util.table.insert(words, word)
end

core.engine.print("info", util.table.concat(words, " | ")) -- 'one | two | three'

local text = 'name="John" age="25" city="NYC"'
for value in util.string.gmatch(text, '"(.-)"') do
    core.engine.print("info", value)
end

--[[
Output: 
'John'
'25'
'NYC'
]]

local text = "Contact: john@example.com or jane@example.com"
for email in util.string.gmatch(text, "%S+@%S+") do
    core.engine.print("info", email)
end

--[[
Output: 
'john@example.com'
'jane@example.com'
]]

local count = 0
for _ in util.string.gmatch("the cat sat on the mat", "the") do
    count = count + 1
end

core.engine.print("info", count) -- 2