why is a javascript string shown as undefined in alert?
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Safely turning a JSON string into an object
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How do I make JavaScript Object using a variable String to define the class name?
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Javascript null or empty string does not work
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How to edit a JavaScript alert box title?
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How to access javascript variable stored in function closure from browser console?
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assignment in javascript and the var keyword
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How undefined is undefined behavior?
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(Why) is using an uninitialized variable undefined behavior?
100393
What causes: "Notice: Uninitialized string offset" to appear?
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How to determine if a string is a valid variable name?
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Detecting an undefined object property
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Why am I getting undefined is not a function when using jquery?
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How to override the alert function with a userscript?
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How do you convert a jQuery object into a string?
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What is the scope of variables in JavaScript?
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How to use JavaScript variables in jQuery selectors?
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How to check a not-defined variable in JavaScript