There's not much more to show short of the example from the documentation. $^M isn't for general control over use of memory; it's a specific place you can pre-allocate a buffer to be used formatting error messages in the case that your process hits a memory limit (and hence couldn't request more memory from the OS at that point in time). Think of it like pulling a sheet of paper out of the ream and setting it in a safe place next to the copier so you have someplace to write a "Copier out of paper" sign when you run out.

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re: How use $^M? by Fletch
in thread How use $^M? by xiaoyafeng

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