课程: JavaScript: Maps and Sets

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Solution: Maps 1

Solution: Maps 1 - JavaScript教程

课程: JavaScript: Maps and Sets

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Solution: Maps 1

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(upbeat music) - [Instructor] Welcome to your first CoderPad challenge for maps. For this particular challenge, we're going to set up a map and then we're going to determine the map size. So below in our test code, you can see that we already have a new map of fruit inventory set up for us. So now we just need to add individual items to that map. And then we're going to return the size of a map to test our solution. So the first thing that I'll do is start with our fruit inventory and then we're going to use the map method set to add each item in the inventory. So our first value here is going to be the key, which will be apples, and then the value of 10. So we'll just go right down the line with each of these items and add it to our map. So oranges 15 value, and then bananas right after. And that has a value of 20. Excellent. So we have all our items added to the map. Now we need to determine the size. So we're going to use the size property to do so. So fruit inventory, spell that…

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