How to count the number of element in an array using javascript?


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How to create array in JavaScript?

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What is the output of 10+20+”30″ in JavaScript?

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What is a function in javascript and how does it work?

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Define unescape() and escape() functions?

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What are the advantages of using JavaScript?

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I have a report which has id as hyperlink.when i click the id it should move to next report which displays the corresponding details.tell me how to get the value of hyperlink(which id is clicked) dynamically using javascript? so that i can make condition on my second report?

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How to get an element by class in javascript ?

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Do unused imports affect performance javascript?

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Write a main method that prompts the user to enter the starting population, birth and death rates, and the number of years. The input birth and death rates cannot be negative, the starting population cannot be less than 2, and the number of years greater than 0. If the user enters an invalid value, this program will prompt user to re-enter the value until a valid value has been read. When all input values are valid, call on the methods above to compute estimated population and print result.

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Explain why "self" is needed instead of "this".

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What are the different objects used in javascripts?

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How do you check if an object is an array or not?

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