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Nicholas Wilson
5ce53a2510 Merge 5615da920f into 855251e478 2024-12-26 00:10:20 -05:00
2 changed files with 1 additions and 46 deletions

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@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
_1550 TILs and counting..._
_1549 TILs and counting..._
---
@@ -406,7 +406,6 @@ _1550 TILs and counting..._
- [Build For A Specific OS And Architecture](go/build-for-a-specific-os-and-architecture.md)
- [Check If Cobra Flag Was Set](go/check-if-cobra-flag-was-set.md)
- [Combine Two Slices](go/combine-two-slices.md)
- [Create A Slice From An Array](go/create-a-slice-from-an-array.md)
- [Detect If Stdin Comes From A Redirect](go/detect-if-stdin-comes-from-a-redirect.md)
- [Deterministically Seed A Random Number Generator](go/deterministically-seed-a-random-number-generator.md)
- [Do Something N Times](go/do-something-n-times.md)

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# Create A Slice From An Array
Slices in Go are a flexible abstraction over arrays. We can create a slice from
an array with the `[n:m]` _slicing_ syntax. We specify the left and right
(exclusive) bounds of the array that we want to create the slice relative to.
We can exclude the lower bound which translates to the `0` index of the array.
We can exclude the left bound which translates to the end of the array. We can
even exclude both ends of the _slicing_ syntax which means creating a slice of
the entire array.
Here is an example of each of those:
```go
package main
import "fmt"
func main() {
arr := [...]string{
"taco",
"burrito",
"torta",
"enchilada",
"quesadilla",
"pozole",
}
firstTwo := arr[:2]
lastTwo := arr[len(arr)-2:]
all := arr[:]
fmt.Println("First two:", firstTwo)
// First two: [taco burrito]
fmt.Println("Last two:", lastTwo)
// Last two: [quesadilla pozole]
fmt.Println("All:", all)
// All: [taco burrito torta enchilada quesadilla pozole
}
```
[source](https://go.dev/blog/slices-intro#slices)