Update strings-package concept docs

concepts/strings-package/.meta/config.json

@@ -1,5 +1,10 @@
 {
-  "blurb": "The standard library strings package includes great utility functions to work with strings.",
-  "authors": ["tehsphinx", "erikschierboom"],
-  "contributors": []
+  "blurb": "The standard library \"strings\" package includes utility functions to work with strings.",
+  "authors": [
+    "tehsphinx",
+    "erikschierboom"
+  ],
+  "contributors": [
+    "BNAndras"
+  ]
 }

concepts/strings-package/about.md

@@ -1,23 +1,44 @@
 # About
 
-The [`strings` package](https://pkg.go.dev/strings) contains many useful functions to work on strings:
+The [`strings` package](https://pkg.go.dev/strings) provides functions for working with strings.
+Below are some of the functions in the package; check out the documentation to see the rest!
 
-| Function                                            | Purpose                                                             |
-| --------------------------------------------------- | ------------------------------------------------------------------- |
-| [ToLower](https://pkg.go.dev/strings#ToLower)       | Convert the string to lower case                                    |
-| [ToUpper](https://pkg.go.dev/strings#ToUpper)       | Convert the string to upper case                                    |
-| [TrimSpace](https://pkg.go.dev/strings#TrimSpace)   | Trim leading and trailing whitespace                                |
-| [Index](https://pkg.go.dev/strings#Index)           | Find the index of the first instance of a substring within a string |
-| [Replace](https://pkg.go.dev/strings#Replace)       | Replace one occurrence of a substring in a string                   |
-| [ReplaceAll](https://pkg.go.dev/strings#ReplaceAll) | Replace all occurrences of a substring in a string                  |
-| [Split](https://pkg.go.dev/strings#Split)           | Split a string into parts based on a separator                      |
-| [HasSuffix](https://pkg.go.dev/strings#HasSuffix)   | Check if a string ends with a specific substring                    |
-| [Count](https://pkg.go.dev/strings#Count)           | Count the number of occurrences of a substring within a string      |
+| Role                  | Function                                            | Purpose                                                             |
+| --------------------- | --------------------------------------------------- | ------------------------------------------------------------------- |
+| Case Conversion       | [ToLower](https://pkg.go.dev/strings#ToLower)       | Convert a string to lower case                                      |
+| Case Conversion       | [ToUpper](https://pkg.go.dev/strings#ToUpper)       | Convert a string to upper case                                      |
+| Searching             | [Contains](https://pkg.go.dev/strings#Contains)     | Check if a string contains a specific substring                     |
+| Searching             | [Count](https://pkg.go.dev/strings#Count)           | Count non-overlapping occurrences of a substring                    |
+| Searching             | [HasPrefix](https://pkg.go.dev/strings#HasPrefix)   | Check if a string starts with a specific substring                  |
+| Searching             | [HasSuffix](https://pkg.go.dev/strings#HasSuffix)   | Check if a string ends with a specific substring                    |
+| Searching             | [Index](https://pkg.go.dev/strings#Index)           | Return the index of the first occurrence of a substring, or -1      |
+| Modifying             | [Replace](https://pkg.go.dev/strings#Replace)       | Replace up to n occurrences of a substring                          |
+| Modifying             | [ReplaceAll](https://pkg.go.dev/strings#ReplaceAll) | Replace all occurrences of a substring                              |
+| Modifying             | [TrimSpace](https://pkg.go.dev/strings#TrimSpace)   | Remove leading and trailing whitespace                              |
+| Splitting or Joining  | [Join](https://pkg.go.dev/strings#Join)             | Join a slice of strings with a separator                            |
+| Splitting or Joining  | [Split](https://pkg.go.dev/strings#Split)           | Split a string into parts on a separator                            |
 
 ```go
 import "strings"
 
-strings.ToLower("Gopher")    // => "gopher"
-strings.Index("Apple", "le") // => 3
-strings.Count("test", "t")   // => 2
+// Case conversion
+strings.ToLower("Gopher")              // "gopher"
+strings.ToUpper("Gopher")              // "GOPHER"
+
+// Searching
+strings.Contains("Apple", "le")        // true
+strings.Index("Apple", "le")           // 3
+strings.Index("Apple", "xyz")          // -1
+strings.Count("test", "t")             // 2
+strings.HasPrefix("Gopher", "Go")      // true
+strings.HasSuffix("Gopher", "er")      // true
+
+// Modifying
+strings.TrimSpace("  hello  ")         // "hello"
+strings.Replace("aabbcc", "b", "x", 1) // "aaxbcc"
+strings.ReplaceAll("aabbcc", "b", "x") // "aaxxcc"
+
+// Splitting or Joining
+strings.Split("a,b,c", ",")                // []string{"a", "b", "c"}
+strings.Join([]string{"a", "b", "c"}, ",") // "a,b,c"
 ```

concepts/strings-package/introduction.md

@@ -1,9 +1,41 @@
 # Introduction
 
-The `strings` package contains many useful functions to work on strings.
+The [`strings` package](https://pkg.go.dev/strings) provides functions for working with strings:
+
+| Role                  | Function                                            | Purpose                                                             |
+| --------------------- | --------------------------------------------------- | ------------------------------------------------------------------- |
+| Case Conversion       | [ToLower](https://pkg.go.dev/strings#ToLower)       | Convert a string to lower case                                      |
+| Case Conversion       | [ToUpper](https://pkg.go.dev/strings#ToUpper)       | Convert a string to upper case                                      |
+| Searching             | [Contains](https://pkg.go.dev/strings#Contains)     | Check if a string contains a specific substring                     |
+| Searching             | [Count](https://pkg.go.dev/strings#Count)           | Count non-overlapping occurrences of a substring                    |
+| Searching             | [HasSuffix](https://pkg.go.dev/strings#HasSuffix)   | Check if a string ends with a specific substring                    |
+| Searching             | [Index](https://pkg.go.dev/strings#Index)           | Return the index of the first occurrence of a substring, or -1      |
+| Modifying             | [Replace](https://pkg.go.dev/strings#Replace)       | Replace up to n occurrences of a substring                          |
+| Modifying             | [ReplaceAll](https://pkg.go.dev/strings#ReplaceAll) | Replace all occurrences of a substring                              |
+| Modifying             | [TrimSpace](https://pkg.go.dev/strings#TrimSpace)   | Remove leading and trailing whitespace                              |
+| Splitting or Joining  | [Join](https://pkg.go.dev/strings#Join)             | Join a slice of strings with a separator                            |
+| Splitting or Joining  | [Split](https://pkg.go.dev/strings#Split)           | Split a string into parts on a separator                            |
 
 ```go
 import "strings"
 
-strings.ToUpper("test") // => "TEST"
+// Case conversion
+strings.ToLower("Gopher")              // "gopher"
+strings.ToUpper("Gopher")              // "GOPHER"
+
+// Searching
+strings.Contains("Apple", "le")        // true
+strings.Index("Apple", "le")           // 3
+strings.Index("Apple", "xyz")          // -1
+strings.Count("test", "t")             // 2
+strings.HasSuffix("Gopher", "er")      // true
+
+// Modifying
+strings.TrimSpace("  hello  ")         // "hello"
+strings.Replace("aabbcc", "b", "x", 1) // "aaxbcc"
+strings.ReplaceAll("aabbcc", "b", "x") // "aaxxcc"
+
+// Splitting or Joining
+strings.Split("a,b,c", ",")                // []string{"a", "b", "c"}
+strings.Join([]string{"a", "b", "c"}, ",") // "a,b,c"
 ```