From a711151fd9306403cd8fc4b62a2356977e07ea58 Mon Sep 17 00:00:00 2001
From: David Anthoff <anthoff@berkeley.edu>
Date: Thu, 23 Nov 2017 17:17:37 -0800
Subject: [PATCH] Add lifted version of split

---
 src/DataValues.jl     |  1 +
 src/scalar/strings.jl | 15 +++++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 src/scalar/strings.jl

diff --git a/src/DataValues.jl b/src/DataValues.jl
index 51c7983..80faab8 100644
--- a/src/DataValues.jl
+++ b/src/DataValues.jl
@@ -10,6 +10,7 @@ export dropna, dropna!, padna!, padna
 include("scalar/core.jl")
 include("scalar/broadcast.jl")
 include("scalar/operations.jl")
+include("scalar/strings.jl")
 
 include("array/typedefs.jl")
 include("array/constructors.jl")
diff --git a/src/scalar/strings.jl b/src/scalar/strings.jl
new file mode 100644
index 0000000..8b11cf4
--- /dev/null
+++ b/src/scalar/strings.jl
@@ -0,0 +1,15 @@
+function Base.split(str::DataValue{T}) where {T<:AbstractString}
+    if isnull(str)
+        return SubString{T}[]
+    else
+        return split(get(str))
+    end
+end
+
+function Base.split(str::DataValue{T}, splitter; kwargs...) where {T<:AbstractString}
+    if isnull(str)
+        return SubString{T}[]
+    else
+        return split(get(str), splitter; kwargs...)
+    end    
+end