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Opens a port. Makes a new port from a specification, if necessary.
spec [port! file! url! block!]
/new - Create new file - if it exists, reset it (truncate)
/read - Open for read access
/write - Open for write access
/seek - Optimize for random access
/allow - Specifies protection attributes
Opens a port for I/O operations. The value returned from OPEN can be used to examine or modify the data associated with the port. The argument must be a fully-specified port specification, an abbreviated port specification such as a file path or URL, or a block which is executed to modify a copy of the default port specification.
autos: open/new %autos.txt insert autos "Ford" insert tail autos " Chevy" close autos print read %autos.txt
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