Nodes for the term “exists”

Java “file exists” testing

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Java File IO: How to test whether a file or directory exists

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Perl: How to test if a file exists

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My Perl hash tutorials

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The Perl exists function - test to see if a hash key exists

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Nagios error code 127, make sure your plugin actually exists

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How to make an Ant script fail gracefully if a property file doesn't exist

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