From a49995723e391ef2ea10e6462c9859b7aa372b1d Mon Sep 17 00:00:00 2001
From: jrmeurer <jrmeurer@wisc.edu>
Date: Thu, 8 Jun 2023 12:47:53 -0600
Subject: [PATCH] Add isDefined and removeUndefineds

---
 src/utils/index.ts |  1 +
 src/utils/util.ts  | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 src/utils/util.ts

diff --git a/src/utils/index.ts b/src/utils/index.ts
index 831031f..8a9c0c5 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -7,4 +7,5 @@ export * from './format';
 export * from './gas';
 export * from './network';
 export * from './promises';
+export * from './util';
 export * from './versions';
diff --git a/src/utils/util.ts b/src/utils/util.ts
new file mode 100644
index 0000000..db478f0
--- /dev/null
+++ b/src/utils/util.ts
@@ -0,0 +1,13 @@
+export const isDefined = <T>(a: T | undefined | null): a is T => {
+  return typeof a !== 'undefined' && a !== null;
+};
+
+export const removeUndefineds = <T>(a: Optional<T>[]): T[] => {
+  const newArray: T[] = [];
+  for (const item of a) {
+    if (isDefined(item)) {
+      newArray.push(item);
+    }
+  }
+  return newArray;
+};