Add Create A Slice From An Array as a Go TIL

README.md

@@ -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).
 
-_1549 TILs and counting..._
+_1550 TILs and counting..._
 
 ---
 
@@ -406,6 +406,7 @@ _1549 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)

go/create-a-slice-from-an-array.md

@@ -0,0 +1,44 @@
+# 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)