227
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1 |
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283
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2 |
import CW7a._
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227
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3 |
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4 |
assert(occurrences(List("a", "b", "b", "c", "d")) == Map("a" -> 1, "b" -> 2, "c" -> 1, "d" -> 1))
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5 |
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6 |
assert(occurrences(List("d", "b", "d", "b", "d")) == Map("d" -> 3, "b" -> 2))
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323
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7 |
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8 |
assert(occurrences(List("b", "b", "b", "b", "b")) == Map("b" -> 5))
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9 |
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10 |
assert(occurrences(Nil) == Map())
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