javascript - What .join() method does in Google App Script? - Stack Overflow

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Actually, I'm doing a script which removes row duplicates from an array. And it works properly, but I don't know why :) Here is a string of my code:

if (refValues[i].join() == uniqueAddrs[n].join())

Actually, I'm doing a script which removes row duplicates from an array. And it works properly, but I don't know why :) Here is a string of my code:

if (refValues[i].join() == uniqueAddrs[n].join())

• javascript
• google-apps-script

Share Improve this question Follow edited Feb 13, 2015 at 14:17 Cameron Roberts 7,37711 gold badge2222 silver badges3434 bronze badges asked Feb 13, 2015 at 8:44 Oleg DatsenkoOleg Datsenko 7911 gold badge11 silver badge88 bronze badges

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2 Answers 2

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It's worth mentioning that .join() is actually a core Javascript method, not a Google Apps Specific one.

You can see the documentation here: https://developer.mozilla/en/docs/Web/JavaScript/Reference/Global_Objects/Array/join

refValues and uniqueAddrs are array variables, and join() method just concatenates all elements in these arrays to a string. This is a quick and dirty way to check string arrays for equality.

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