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Lua scripts may load extension modules using require, [20] just like modules written in Lua itself, or with package.loadlib. [22] When a C library is loaded via require ( 'foo' ) Lua will look for the function luaopen_foo and call it, which acts as any C function callable from Lua and generally returns a table filled with methods.
The Lua language has allowed misspelled, or uninitialized, variables to be used in a script which can eventually cause "script error" while giving no other indication of the misspelled name or invalid data.
Rexx (restructured extended executor) is a high-level programming language developed at IBM by Mike Cowlishaw. [ 6 ] [ 7 ] Both proprietary and open source Rexx interpreters exist for a wide range of computing platforms , and compilers exist for IBM mainframe computers . [ 8 ]