24 lines
1.0 KiB
Go
24 lines
1.0 KiB
Go
package go_koans
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func aboutSlices() {
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fruits := []string{"apple", "orange", "mango"}
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assert(fruits[0] == __string__) // slices seem like arrays
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assert(len(fruits) == __int__) // in nearly all respects
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tasty_fruits := fruits[1:3] // we can even slice slices
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assert(tasty_fruits[0] == __string__) // slices of slices also share the underlying data
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pregnancy_slots := []string{"baby", "baby", "lemon"}
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assert(cap(pregnancy_slots) == __int__) // the capacity is initially the length
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pregnancy_slots = append(pregnancy_slots, "baby!")
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assert(len(pregnancy_slots) == __int__) // slices can be extended with append(), much like realloc in C
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assert(cap(pregnancy_slots) == __int__) // but with better optimizations
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pregnancy_slots = append(pregnancy_slots, "another baby!?", "yet another, oh dear!", "they must be Catholic")
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assert(len(pregnancy_slots) == __int__) // append() can take N arguments to append to the slice
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assert(cap(pregnancy_slots) == __int__) // the capacity optimizations have a guessable algorithm
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}
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