Yes, easy reading, as a non-programmer the only thing that lost me was the throw away line in the code comments on "function arguments are call-by-value". I've some recollection that call-by-value and call-by-reference are options here but not entirely clear what the meaning of "call-by-value" is.
Am I right in saying that if I call a function on $2, say, that unless that variable is explicitly assigned in the function that $2 remains unchanged after the function operates. But that with a call-by-reference the value of the variable itself will be altered? Something along those lines.
Am I right in saying that if I call a function on $2, say, that unless that variable is explicitly assigned in the function that $2 remains unchanged after the function operates. But that with a call-by-reference the value of the variable itself will be altered?
You've got it. At least that's what passing a variable by reference vs. by value means in other languages, such as PHP.
