updated README.md

d4s6 · Jan 18, 2023 · c851abd · c851abd
1 parent 18fe663
commit c851abd
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/README.md b/README.md
@@ -3,9 +3,17 @@
 Line numbers as _immutable_ value objects.  
 With a [WeakMap](https://www.php.net/WeakMap) based repository in the background.
 
+## installation
+
+```bash
+composer require davidschwarz/line-number
+```
+
 ## example
 
 ```php
+require __DIR__ . '/vendor/autoload.php';
+
 use DavidSchwarz\LineNumber\Line;
 
 $startLine = Line::number(0);
@@ -17,9 +25,9 @@ $otherLine->equals(2);          // TRUE
 (string) Line::number(7);       // '7'
 Line::number(7)->i;             // 7
 
-Line::number(-1);               // ...\NegativeValueError
+Line::number(-1);               // throws ...\NegativeValueError
 
-Line::number(0)->subtract(2);   // ...\NegativeResultError
+Line::number(0)->subtract(2);   // throws ...\NegativeResultError
 
 ```