Re^3: Different behaviors between "while" and "map"

[betterworld]

in reply to Re^2: Different behaviors between "while" and "map"
in thread Different behaviors between "while" and "map"

It helps to know that the loop is expanded to:

while ($_ = <SOME_FILE_HANDLE>){
   ...
}

This shows that <...> is nothing more than a loop condition: the loop body is executed immediately after each evaluation of the <...> operator. This is how a while loop works.

[JavaFan]

Not for the last 12 years or so. It's expanded to

while (defined ($_ = <SOME_FILE_HANDLE>)) {
    ...
}

[ikegami]

Technically, you're both right, because

while ($_ = <SOME_FILE_HANDLE>){
   ...
}

is expanded to

while (defined ($_ = <SOME_FILE_HANDLE>)) {
   ...
}

But all this is irrelevant. It's not the magical expansion of <> that causes the scalar context.