Merge 5615da920f into 63a92cbc29

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).
 
-_1548 TILs and counting..._
+_1547 TILs and counting..._
 
 ---
 
@@ -420,7 +420,6 @@ _1548 TILs and counting..._
 - [Sleep For A Duration](go/sleep-for-a-duration.md)
 - [Sort Slice In Ascending Or Descending Order](go/sort-slice-in-ascending-or-descending-order.md)
 - [Upgrading From An Older Version On Mac](go/upgrading-from-an-older-version-on-mac.md)
-- [Write A Custom Scan Function For File IO](go/write-a-custom-scan-function-for-file-io.md)
 
 ### GROQ
 

go/write-a-custom-scan-function-for-file-io.md

@@ -1,58 +0,0 @@
-# Write A Custom Scan Function For File IO
-
-By default a [`bufio.Scanner`](https://pkg.go.dev/bufio#Scanner) will scan
-input line-by-line. In other words, splitting on newlines such that each
-iteration will emit everything up to the next newline character.
-
-We can write our own `SplitFunc` and override the default one by calling
-`scanner.Split` with it. Our custom scan function needs to match the type
-signature of [`SplitFunc`](https://pkg.go.dev/bufio#SplitFunc).
-
-Here is a custom one that emits each individual character but omits the
-newlines.
-
-```go
-func ScanChar(data []byte, atEOF bool) (int, []byte, error) {
-	if atEOF || len(data) == 0 {
-		return 0, nil, nil
-	}
-
-	start := 0
-	for start < len(data) {
-		if !utf8.FullRune(data[start:]) {
-			return 0, nil, nil
-		}
-
-		r, size := utf8.DecodeRune(data[start:])
-		if r == utf8.RuneError {
-			return 0, nil, fmt.Errorf("invalid UTF-8 encoding")
-		}
-
-		if r != '\n' {
-			return start + size, data[start:start+size], nil
-		}
-
-		// found a \n, advance the start position
-		start += size
-	}
-
-	return start, nil, nil
-}
-```
-
-We can then use thi `ScanChar` function with a `bufio.Scanner` like so:
-
-```go
-func ReadFileByCharacter(file io.Reader) {
-	scanner := bufio.NewScanner(file)
-
-	// override default SplitFunc
-	scanner.Split(scanChar)
-
-	for scanner.Scan() {
-		char := scanner.Text()
-
-		fmt.Printf("- %s\n", char)
-	}
-}
-```