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javascriptarraysaveragestring-length

Finding Average String Length of Strings in Array - Javascript

I have an array of six quotes and I'm trying to find the average length of each quote. I'm thinking I need to create a new array of the string lengths, then average. But I can't figure out how to get the counts of the original array into the new array. How do I get the counts of the first array into the new array?

Solution 

  • arr = [1, 12, 123, 1234]                    // works with numbers too
avg = arr.join('').length / arr.length      // 10 / 4 = 2.5
console.log(avg)