Perl

How did Perl complain? print $ids should work, though you probably want a newline at the end, either explicitly with print as above or implicitly by using say or -l/$\. If you want to interpolate a variable in a string and have something immediately after it that would looks like part of the variable but isn’t, enclose the variable name in {}:

How to run a shell script from a Perl program 1. Using system system($command, @arguments); For example: System will execute the $command with @arguments and return to your script when finished. You may check $! for certain errors passed to the OS by the external application. Read the documentation for system for the nuances of how … Read more

The first and third ways are the same: they evaluate an array in scalar context. I would consider this to be the standard way to get an array’s size. The second way actually returns the last index of the array, which is not (usually) the same as the array size.

If the response that you get has Client-Warning header, as seen in response below, then it is a tcp level error and response is produced by LWP client and not the server:

Have a look at perldiag: Global symbol “%s” requires explicit package name (F) You’ve said “use strict” or “use strict vars”, which indicates that all variables must either be lexically scoped (using “my” or “state”), declared beforehand using “our”, or explicitly qualified to say which package the global variable is in (using “::”).

Seems one should be registered to use it, instructions weren’t clear on the site. I received the email finally with userid and ran the script, this time it worked.

Technically, the if (1) does nothing interesting, since it’s an always-executed if-statement. One common use of an if (1) though is to wrap code you’d like to be able to quickly disable, say for debugging purposes. You can quickly change an if (1) to if (0) to disable the code.