feat: add useMemo snip (#68)

Co-authored-by: xhe <x.b.he@accenture.com>

.gitignore

@@ -1,2 +1,4 @@
 node_modules
 package-lock.json
+
+.DS_Store

packages/vscode/README.md

@@ -51,25 +51,31 @@
    useEffect(() => {}, []);
    ```
 
-7. `rus` (useState hook)
+7. `rum` (useMemo hook)
 
    ```jsx
-   const [state, setState] = useState(initialValue);
+   useMemo(() => {}, []);
    ```
 
-8. `ruc` (useContext hook)
+8. `rus` (useState hook)
 
    ```jsx
-   const value = useContext(myContext);
+   const [state, setState] = useState(initialValue);
    ```
 
-9. `rucb` (useCallback hook)
+9. `ruc` (useContext hook)
 
    ```jsx
-   const handleCallback = useCallback(() => {}, []);
+   const value = useContext(myContext);
    ```
 
-10. `rur` (useRef hook)
+10. `rucb` (useCallback hook)
+
+```jsx
+const handleCallback = useCallback(() => {}, []);
+```
+
+11. `rur` (useRef hook)
 
     ```jsx
     const refContainer = useRef(initialValue);
@@ -80,13 +86,13 @@
 1. `rfcet` (React functional component)
 
    ```tsx
-   import React from "react";
+   import type { FC } from "react";
 
    interface Props {}
 
-   function Component({}: Props) {
+   const Component: FC<Props> = () => {
      return <div></div>;
-   }
+   };
 
    export default Component;
    ```
@@ -97,25 +103,31 @@
    useEffect(() => {}, []);
    ```
 
-3. `rust` (useState hook)
+3. `rumt` (useMemo hook)
+
+   ```tsx
+   useMemo<>(() => {}, []);
+   ```
+
+4. `rust` (useState hook)
 
    ```tsx
    const [state, setState] = useState(initialValue);
    ```
 
-4. `ruct` (useContext hook)
+5. `ruct` (useContext hook)
 
    ```tsx
    const value = useContext(myContext);
    ```
 
-5. `rucbt` (useCallback hook)
+6. `rucbt` (useCallback hook)
 
    ```jsx
    const handleCallback = useCallback(() => {}, []);
    ```
 
-6. `rurt` (useRef hook)
+7. `rurt` (useRef hook)
 
    ```tsx
    const refContainer = useRef(initialValue);

packages/vscode/snippets/react-javascript.json

@@ -34,6 +34,11 @@
     "body": ["useEffect(() => {", "\t$1", "}, []);"],
     "description": "JavaScript: useEffect hook"
   },
+  "rum": {
+    "prefix": "rum",
+    "body": ["useMemo(() => {", "\t$1", "}, []);"],
+    "description": "JavaScript: useMemo hook"
+  },
   "rus": {
     "prefix": "rus",
     "body": ["const [${1}, set${1}] = useState(${2});"],

packages/vscode/snippets/react-typescript.json

@@ -22,13 +22,14 @@
   "rfct": {
     "prefix": "rfct",
     "body": [
-      "import type { FC } from 'react'",
+      "import type { FC } from 'react';",
       "",
       "interface ${TM_FILENAME_BASE}Props {}",
       "",
-      "export const $TM_FILENAME_BASE: FC<${TM_FILENAME_BASE}Props> = ({$2}) => {",
+      "const $TM_FILENAME_BASE: FC<${TM_FILENAME_BASE}Props> = ({$2}) => {",
       "\t\treturn ($3);",
-      "}"
+      "}",
+      "export default $TM_FILENAME_BASE;"
     ],
     "description": "Typescript: React functional component"
   },
@@ -37,6 +38,11 @@
     "body": ["useEffect(() => {", "\t$1", "}, []);"],
     "description": "TypeScript: useEffect hook"
   },
+  "rumt": {
+    "prefix": "rumt",
+    "body": ["useMemo<${1}>(() => {", "\t$2", "}, []);"],
+    "description": "Typescript: useMemo hook"
+  },
   "rust": {
     "prefix": "rust",
     "body": ["const [${1}, set${1}] = useState(${2});"],