87 lines
1.4 KiB
Go
87 lines
1.4 KiB
Go
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package main
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import (
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"fmt"
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"unsafe"
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)
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func accessToElement1() {
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data := [3]int{1, 2, 3}
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idx := 4
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fmt.Println(data[idx]) // panic
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fmt.Println(data[4]) // compilation error
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}
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func accessToElement2() {
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data := [3]int{1, 2, 3}
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idx := -1
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fmt.Println(data[idx]) // panic
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fmt.Println(data[-1]) // compilation error
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}
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func arrayLen() {
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data := [10]int{}
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fmt.Println(len(data)) // 10
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}
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func capArray() {
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var data [10]int
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fmt.Println(cap(data)) // 10
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}
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func arraysComparison() {
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first := [...]int{1, 2, 3}
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second := [...]int{1, 2, 3}
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// except arrays whose element types are incomparable types
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fmt.Println(first == second)
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fmt.Println(first != second)
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// [<, <=, >, >=] -> compilation error
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}
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func emptyArray() {
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var data [10]byte
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fmt.Println(unsafe.Sizeof(data)) // 10
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//data == nil // compilation error
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}
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func zeroArray() {
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var data [0]int
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fmt.Println(unsafe.Sizeof(data)) // 0
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}
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func arrayOfEmptyStructs() {
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var data [10]struct{}
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fmt.Println(unsafe.Sizeof(data)) // 0
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}
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func negativeArray() {
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var data [-1]int // compilation error
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_ = data
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}
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func arrayCreation() {
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length1 := 100
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var data1 [length1]int // compilation error
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_ = length1
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_ = data1
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const length2 = 100
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var data2 [length2]int
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_ = data2
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}
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func makeArray() {
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_ = make([10]int, 10) // compilation error
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}
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func appendToArray() {
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_ = append([10]int{}, 10) // compilation error
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}
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