#!/usr/bin/hopper

#include <hopper.h>

main:

  /* execute "ls -lstar" with no result return (only displayed) */
  {"ls -lstar"},execv

  /* this form does not allow composition of the line with variables.
     Save result in the variable "s", and then display it */
  s=`ls -l | awk '{if($2=="2")print $0;}'`
  {"\n",s,"\n"}print

  data="2"
  {""}tok sep

  // the same as above, only I can compose the line:
  {"ls -l | awk '{if($2==\"",data,"\")print $0;}'"}join(s),{s}exec,print
  {"\n\n"}print

  // this does the same as above, with an "execute" macro inside a "let" macro:
  t=0,let (t := execute( {"ls -l | awk '{if($2==\""},{data},{"\")print $0;}'"} ))
  {t,"\n"}print

{0}return