perl if -e $ filename

Perl File Test Operators

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The Perl file test operators are logical operators which return true or false value. For example, to check if a file exists you use -e operator.

What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d

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They can act on any file or directory name or any file or directory handle. ... if (-e $filename) ; print The file '$filename' exists-n;; }. -s ...

perl

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The perldoc unary operator -e checks if a file exists. Perldoc unary file test operators list: -r File is readable by effective uid/gid.

Perl中if [

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perl文件用法 · - `if`语句用于条件判断，`for`和`while`循环用于迭代。 - `foreach`循环常用于遍历数组，例如`foreach my $item (@array) ...}`。 7. ** ...

How to Tell if a File Exists in Perl

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Perl has a set of useful file test operators that can be used to see whether a file exists or not. Among them is -e, which checks to see if a file exists.

What does '!

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The -e filename is one of filetests (-X), which checks for existence of a file (an entry, not only a plain file). So the condition tests ...

https://perldoc.perl.org

This unary operator takes one argument, either a filename, a filehandle, or a dirhandle, and tests the associated file to see if something is true about it.

parsefile.t

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print 1..6-n; my $filename = file$$.htm; die $filename is already there if -e $filename; open(FILE, >$filename) || die Can't create $filename: $! ...

[Chapter 10] 10.5 The

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... e filename to test if the file exists. Similarly, Perl uses -e $filevar to test for the existence of the file named by the scalar value in $filevar . If ...

If $filename exists

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Hello there. I'm new to Perl and I have a question about statements with variables that state the name of a file.