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To understand how precedence works in this circumstance, consider the following variation of the OP's code. The assignment operator has enough precendence to end evaluation of the trinary conditional operator, so the conditional operator is simply choosing an "lvalue" for the assignment operator. The parenthesis in the second loop help show what's actually happening.
```use strict;
use warnings;

my \$x='baz';
my \$y='moo';

for (1..10) {
\$_>5 ? \$x='foo' : \$y='bar';
print "x=\$x, y=\$y\n";
}

# re-initialize vars
print "----------\n";
\$x = 'baz';
\$y = 'moo';

# the above loop is functionally equivalent to:
for (1..10) {
(\$_>5 ? \$x : \$y) = 'bar';
print "x=\$x, y=\$y\n";
}
[download]```
Output:
```x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
----------
x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=baz, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
x=bar, y=bar
[download]```

In reply to Re: Conditional Operator Confusion by MonkE
in thread Conditional Operator Confusion by Melly

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 [Cosmic37]: I have 2 files each with datetime and other data in unknown order and I want to find rows from both files matching by datetime and output them combined/ concatenated [Corion]: Sure [Corion]: Do you have any specific interests or general Perl knowledge? [Cosmic37]: should I slurp? should I grep? Noble Lords I wish you good karma and beg your advice [Corion]: Cosmic37: Ah, see perlfaq4, about How do I compute the intersection of two arrays [Cosmic37]: I am out of practice; I use Perl for scientific programming for number crunching [Corion]: Cosmic37: Basically, you read one file into a hash, keyed by your key, and then match the lines from the second file to that hash [Cosmic37]: note that the two files only have datetimes which may match whereas other data per line is different format in file1 and file2 - is that really intersection? [jedikaiti]: Hi Monks [Corion]: Cosmic37: Well, if you want to use only parts of a line for the key, see split or whatever other mechanism to extract the key from the line

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