https://chiselapp.com/user/rkeene/repository/pipethread/%|%pipethread%|% is a module by [rkeene] that implements [thread]-based concurrency '''and''' parallelism. It gives you the `|` from [sh] in Tcl, for Tcl code.

** Use examples **

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proc a {inchan outchan} { puts $outchan blah }
pipethread::pipe a | { gets $inchan line; puts $outchan "[string length $line]:$line" }

set output [pipethread::pipe exec ls | foreach line { puts $outchan "-->$line<--" }]

pipethread::pipe -outchan stdout -- exec ls | foreach line { puts $outchan "-->$line<--" }
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** Discussion **

[PYK] {2016 07 24}:  [https://scsh.net/%|%SCSH] is a related contraption for [Scheme].


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