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

It helps to know that the loop is expanded to:

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

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.

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Re^4: Different behaviors between "while" and "map" by JavaFan (Canon) on Dec 06, 2008 at 02:18 UTC
Not for the last 12 years or so. It's expanded to `while (defined ($_ = <SOME_FILE_HANDLE>)) { ... }` [download]	[reply] [d/l]
Re^5: Different behaviors between "while" and "map" by ikegami (Patriarch) on Dec 06, 2008 at 06:09 UTC
Technically, you're both right, because `while ($_ = <SOME_FILE_HANDLE>){ ... }` [download] is expanded to `while (defined ($_ = <SOME_FILE_HANDLE>)) { ... }` [download] But all this is irrelevant. It's not the magical expansion of `<>` that causes the scalar context.	[reply] [d/l] [select]