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How can I find unused images and CSS styles in a website? [closed]

Is there a method (other than trial and error) I can use to find unused image files? How about CSS declarations for ID's and Classes that don't even exist in the site? ...
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wait() or sleep() function in jquery?

... is to do .addClass WHEN it completes and is successful, if not .addClass('error') maybe an idea – Gary Green Apr 19 '11 at 21:41 52 ...
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How do I read and parse an XML file in C#?

... @GabrielGarcia true, sometimes beginner would stuck at missing include's error – Anonymous Jan 22 at 7:53 1 ...
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How does JavaScript .prototype work?

...Due(), getAmountDue() on a Person. //The following statement generates an error. john.setAmountDue(1000); share | improve this answer | follow | ...
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Programmatically shut down Spring Boot application

... @Override public int getExitCode() { // no errors return 0; } }); // or shortened to // int exitCode = SpringApplication.exit(ctx, () -> 0); System.exit(exitCode); } } ...
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Regex to check whether a string contains only numbers [duplicate]

... @D_N. Fair enough. To your original point, yes 008 is an error token in many PLs because it starts like an octal literal, but in standard mathematical notation base ₁₀ is implied. I don't know which the asker wanted and if I were to reject malformed octal, I should match valid...
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Remove Object from Array using JavaScript

... Won't that cause an error because $.each() caches the array length before looping so if you remove an element $.each() will run past the end of the (now shorter) array. (So then someArray[i] will be undefined and undefined.name will crash.) ...
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Easy way to prevent Heroku idling?

...a herokuapp url. EDIT: My bad, I was putting in the http:// and getting an error. – Ruben Martinez Jr. Jul 10 '14 at 14:34 ...
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rvm installation not working: “RVM is not a function”

... As you said, the error shown could be the following one. RVM is not a function, selecting rubies with 'rvm use ...' will not work. You need to change your terminal emulator preferences to allow login shell. Sometimes it is required to use `...
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Swift - Convert to absolute value

... understand why abs(Int8.min) can't work and therefore creates an overflow error. – Imanou Petit May 16 '18 at 11:47 ...