object package

packages/object/index.js

@@ -0,0 +1,29 @@
+'use strict'
+
+export const isObject = arg => {
+  if (arg === null) return false
+  return (typeof arg === 'object') && (arg.constructor === Object)
+}
+
+export const isString = arg => typeof arg === 'string'
+
+export const isNumber = arg => typeof arg === 'number'
+
+export const isFunction = arg => typeof arg === 'function'
+
+export const isArray = arg => Array.isArray(arg)
+
+export const isObjectLike = arg => {
+  if (arg === null) return false
+  return (typeof arg === 'object')
+}
+
+export const isDefined = arg => {
+  return isObject(arg) ||
+    isObjectLike(arg) ||
+    isString(arg) ||
+    isNumber(arg) ||
+    isFunction(arg) ||
+    isArray(arg) ||
+    isObjectLike(arg)
+}