Edição das 11h29min de 4 de dezembro de 2019

Articles

Run a "bc" in a subshell and keep it running to call multiple times from a loop without the overhead to instantiate "bc" every single iteration.

coproc bc
for i in {1..10}
do 
  echo $i'*'$i >&${COPROC[1]}
  read -u ${COPROC[0]} rc
  echo $rc
done
kill $COPROC_PID

OUTPUT

@@ Linha 1: / Linha 1: @@
 =Articles=
 *[https://daemoniolabs.wordpress.com/2011/07/19/entendendo-coprocessos-coproc-do-bash/ Entendendo Coprocessos (coproc) Do Bash]
+=Example=
+Run a "bc" in a subshell and keep it running to call multiple times from a loop without the overhead to instantiate "bc" every single iteration.
+<syntaxhighlight lang=bash>
+coproc bc
+for i in {1..10}
+do
+  echo $i'*'$i >&${COPROC[1]}
+  read -u ${COPROC[0]} rc
+  echo $rc
+done
+kill $COPROC_PID
+</syntaxhighlight>
+OUTPUT
+<pre>
+</pre>