Go Slice Expressions: Difference between revisions
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ss2 := ss[3:6] | ss2 := ss[3:6] | ||
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The slice expression creates a different slice that provides access to the elements with indexes 3, 4, 5 of the underlying array. Both slices <code>ss</code> and <code>ss2</code> provide access to those elements and changes operated via one slice are visible to the other. | The slice expression creates a different slice that provides access to the elements with indexes 3, 4, 5 of the underlying array. Both slices <code>ss</code> and <code>ss2</code> provide access to those elements and changes operated via one slice are visible to the other. | ||
The length of the second slice is the number of elements defined by the slice expression (3). However, since the slices share the same underlying array, the capacity of the second slice is the number of elements from the element with index 3 to the end of the underlying array: 7. | The length of the second slice is the number of elements defined by the slice expression (3). However, since the slices share the same underlying array, the capacity of the second slice is the number of elements from the element with index 3 to the end of the underlying array: 7. | ||
Revision as of 02:35, 19 August 2024
Internal
TODO
Overview
A slice expression applied to a slice creates a new slice that shares the underlying array with the original slice.
ss := make([]int, 10) // declare a slice with length and capacity 10, initialized with 0
ss2 := ss[3:6]
┌─┬
└─┴
The slice expression creates a different slice that provides access to the elements with indexes 3, 4, 5 of the underlying array. Both slices ss and ss2 provide access to those elements and changes operated via one slice are visible to the other.
The length of the second slice is the number of elements defined by the slice expression (3). However, since the slices share the same underlying array, the capacity of the second slice is the number of elements from the element with index 3 to the end of the underlying array: 7.