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How to Remove Empty Element from JS Array

Sometimes you may need to remove empty element from JS array. Here are the different ways to do this.

Sometimes you may need to check if variable is array in JavaScript. Here is how to do it.

Sometimes you may need to get highlighted/selected text in JavaScript. Here are the steps to get highlighted text from your web page.

Sometimes you may need to call JS function in Iframe from parent page. Here are the steps to do so.

Sometimes you may need to prevent page refresh on form submit. Here is how to disable page refresh on form submission in JavaScript.

Sometimes you may need to check if object is array in JavaScript. Here are the steps to do so.

Sometimes you may need to create a regular expression to match URL path. Here are the steps to do it.

Sometimes you may need to split string every nth character in Python. Here are the steps to do it.

Sometimes you may need to reverse/invert dictionary mapping in python. Here are the steps to do it.

Sometimes you may need to sort list of tuples of list of lists by second element. Here is how to sort list of tuples by element at index.