add it_pipe grep for consistency

1 files changed, 11 insertions, 1 deletions

diff --git a/it_pipe.class b/it_pipe.class
index 03d9c69..cae4eb0 100644
--- a/it_pipe.class
+++ b/it_pipe.class
@@ -91,7 +91,7 @@ function map($expr)
 }
 
 /**
- * Apply an expression to every line
+ * Filter lines by an expression
  */
 function filter($expr)
 {
@@ -101,6 +101,16 @@ function filter($expr)
 }
 
 /**
+ * Filter lines by a regexp
+ */
+function grep($regexp)
+{
+	$this->lines = it::grep($regexp, $this->lines);
+
+	return $this;
+}
+
+/**
  * Select cols from tab-separated cols in each line and tab-joins them again. Key order relevant.
  */
 function cut($picks)