Merge 5615da920f into 88e675b9a3

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).
 
-_1540 TILs and counting..._
+_1539 TILs and counting..._
 
 ---
 
@@ -403,7 +403,6 @@ _1540 TILs and counting..._
 - [Access Go Docs Offline](go/access-go-docs-offline.md)
 - [Add A Method To A Struct](go/add-a-method-to-a-struct.md)
 - [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)
 - [Do Something N Times](go/do-something-n-times.md)
 - [Find Executables Installed By Go](go/find-executables-installed-by-go.md)

go/check-if-cobra-flag-was-set.md

@@ -1,41 +0,0 @@
-# Check If Cobra Flag Was Set
-
-When using [Cobra](https://github.com/spf13/cobra) to define a CLI, we can
-specify a flag for a command like so:
-
-```go
-var Seed int64
-myCmd.PersistentFlags().Int64VarP(&Seed, "seed", "", -1, "set a seed")
-```
-
-This `--seed` flag has a _default_ of `-1`. If the flag isn't specified, then
-when we access that flag's value, we'll get `-1`.
-
-But how do we differentiate between the _default_ `-1` and someone passing `-1`
-to the `--seed` flag when running the program?
-
-In the command definition, we can look at the flags and see, by name, if
-specific ones were changed by user input rather than being the defaults.
-
-```go
-myCommand := &cobra.Command{
-	// coommand setup ...
-	Run: func(cmd *cobra.Command, args []string) {
-		if cmd.Flags().Changed("seed") {
-			seed, err := cmd.Flags().GetInt64("seed")
-			if err != nil {
-				fmt.Println("Seed flag is missing from `cmdFlags()`")
-				os.Exit(1)
-			}
-
-			fmt.Printf("Seed was set to %d\n", seed)
-		} else {
-			fmt.Println("Seed was not set")
-		}
-	}
-}
-```
-
-If we don't want to rely on the default and instead want to specify some other
-behavior when the flag is not manually set by the user, we can detect that
-scenario like this.