Add LEFT function.

kmonson · Oct 20, 2020 · dad2be1 · dad2be1
1 parent f3d87cd
commit dad2be1
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diff --git a/koala/Readme.md b/koala/Readme.md
@@ -10,6 +10,7 @@
 * SUMIF
 * AVERAGE
 * RIGHT
+* LEFT
 * INDEX
 * LOOKUP
 * LINEST

diff --git a/koala/excellib.py b/koala/excellib.py
@@ -71,6 +71,7 @@
     "ISBLANK",
     "ISNA",
     "ISTEXT",
+    "LEFT",
     "LINEST",
     "LOG",  # Python function, not defined here
     "LOOKUP",
@@ -503,6 +504,12 @@ def istext(value):
     return type(value) == str
 
 
+def left(text,n=1):
+    if isinstance(text, str):
+        return text[:n]
+
+    return ExcelError('#VALUE!', 'Input value must be text')
+
 # NEEDS TEST
 def linest(*args, **kwargs):  # Excel reference: https://support.office.com/en-us/article/LINEST-function-84d7d0d9-6e50-4101-977a-fa7abf772b6d
 

diff --git a/koala/functions.json b/koala/functions.json
@@ -25,6 +25,7 @@
 "ISBLANK",
 "ISNA",
 "ISTEXT",
+"LEFT",
 "LINEST",
 "LOG",
 "LOOKUP",
-Original file line number
+Diff line change
@@ Expand Up / @@ -10,6 +10,7 @@ @@
     * SUMIF
     * AVERAGE
     * RIGHT
+    * LEFT
     * INDEX
     * LOOKUP
     * LINEST
@@ Expand Down @@