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This function replaces all $ names in a string with the value found in a table, or a function. string.gsub simply requires a suitable pattern for matching these names; note that $ must be escaped.

See StringInterpolation

Author: steved

License: MIT/X11 Tags: string utility template

Snippet

function string_interpolate(tmpl,t)
    return (tmpl:gsub('%$([%a_][%w_]*)',t))
end

Tests/Usage

local function test(tmpl,t)
    print(string_interpolate(tmpl,t))
end

test('$animal ($name)',{animal='dog',name='bonzo'})
test('what is $USER?',os.getenv)

--> dog (bonzo)
--> what is steve?

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