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Use a for loop to sum all the items in the following collection. var total = 0
val items = Array(1, 10, 100, 1000)
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The result should be 1111. |
Use a for loop to sum the numbers from 1 to 4 (the result should be 10). |
var total = 0
for (i <- Range(0, 5)) {
total = total + i
}
You can inspect the content of the range with |
Use a for loop to sum all the numbers in the nested arrays (result should be 21). val multi = Array(Array(1, 2), Array(3, 4), Array(5, 6))
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var total = 0
for (arr <- multi; i <- arr) total = total + i
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Use a for loop to sum all of the even numbers in the following nested arrays. val multi = Array(Array(1, 2), Array(3, 4), Array(5, 6))
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var total = 0
for (arr <- multi; i <- arr; if i % 2 == 0) total = total + i
Scala for loops allow you to express nested loop iteration on a single line. |
Use a for loop to square all of the elements in the following array. val a = Array(1, 2, 3, 4)
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for (i <- a) yield i * i
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Use a for loop to convert |
val a = Array(1, 2, 3, 4)
for (i <- a) yield "hi " + i
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Use a for loop to convert |
val a = Array(1, 2, 3, 4)
for (i <- a if i % 2 == 0) yield "hi " + i
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Use a for loop to flatten the following two arrays into a single array. val a = Array(1, 2)
val b = Array("hello", "world")
// add your code here
// desired result: Array("hello1", "world1", "hello2", "world2")
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for (i <- a; s <- b) yield s + i
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Use a multi-line for loop to flatten the following two arrays into a single array. val a = Array(1, 2)
val b = Array("hello", "world")
// add your code here
// desired result: Array("hello1", "world1", "hello2", "world2")
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for {
i <- a
s <- b
} yield s + i
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