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What is the proper way to check if a string is empty in Perl?

I've just been using this code to check if a string is empty: 6 Answers 6 ...
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Is there a way to access an iteration-counter in Java's for-each loop?

Is there a way in Java's for-each loop 15 Answers 15 ...
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is_file or file_exists in PHP

I need to check if a file is on HDD at a specified location ($path.$file_name). 5 Answers ...
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Is there a way to automatically build the package.json file for Node.js projects

Is package.json supposed to be manually edited? Couldn't a program like npm just look through the files, see the "require" statements, and then use that to put the necessary entries in the package.json file? Are there any programs like that? ...
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How to create json by JavaScript for loop?

I have array of select tag. 5 Answers 5 ...
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What's the fastest algorithm for sorting a linked list?

I'm curious if O(n log n) is the best a linked list can do. 13 Answers 13 ...
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The thread has exited with code 0 (0x0) with no unhandled exception

While debugging my C# application I have noticed a large amount occurrences of the following sentence: 7 Answers ...
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How to loop through array in jQuery?

I am trying to loop through an array. I have the following code: 11 Answers 11 ...
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How to check if field is null or empty in MySQL?

I am trying to figure out how to check if a field is NULL or empty . I have this: 7 Answers ...
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Is there a function to deselect all text using JavaScript?

Is there a function in javascript to just deselect all selected text? I figure it's got to be a simple global function like document.body.deselectAll(); or something. ...