feat: top-level-for-await (#3212)

3 files changed, 29 insertions, 40 deletions

diff --git a/std/examples/cat.ts b/std/examples/cat.ts
index 3626e3c29..9e713d862 100644
--- a/std/examples/cat.ts
+++ b/std/examples/cat.ts
@@ -1,10 +1,7 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-async function cat(filenames: string[]): Promise<void> {
-  for (const filename of filenames) {
-    const file = await Deno.open(filename);
-    await Deno.copy(Deno.stdout, file);
-    file.close();
-  }
+const filenames = Deno.args.slice(1);
+for (const filename of filenames) {
+  const file = await Deno.open(filename);
+  await Deno.copy(Deno.stdout, file);
+  file.close();
 }
-
-cat(Deno.args.slice(1));
diff --git a/std/examples/catj.ts b/std/examples/catj.ts
index cbe06d4b8..87fd6a964 100644
--- a/std/examples/catj.ts
+++ b/std/examples/catj.ts
@@ -79,32 +79,28 @@ function print(data: any): void {
   }
 }
 
-async function main(): Promise<void> {
-  const parsedArgs = parse(Deno.args.slice(1));
-
-  if (parsedArgs.h || parsedArgs.help || parsedArgs._.length === 0) {
-    console.log("Usage: catj [-h|--help] [file...]");
-    console.log();
-    console.log("Examples:");
-    console.log();
-    console.log("// print file:\n   catj file.json");
-    console.log();
-    console.log("// print multiple files:\n   catj file1.json file2.json");
-    console.log();
-    console.log("// print from stdin:\n   cat file.json | catj -");
-  }
+const parsedArgs = parse(Deno.args.slice(1));
+
+if (parsedArgs.h || parsedArgs.help || parsedArgs._.length === 0) {
+  console.log("Usage: catj [-h|--help] [file...]");
+  console.log();
+  console.log("Examples:");
+  console.log();
+  console.log("// print file:\n   catj file.json");
+  console.log();
+  console.log("// print multiple files:\n   catj file1.json file2.json");
+  console.log();
+  console.log("// print from stdin:\n   cat file.json | catj -");
+}
 
-  if (parsedArgs._[0] === "-") {
-    const contents = await Deno.readAll(Deno.stdin);
-    const json = JSON.parse(decoder.decode(contents));
+if (parsedArgs._[0] === "-") {
+  const contents = await Deno.readAll(Deno.stdin);
+  const json = JSON.parse(decoder.decode(contents));
+  print(json);
+} else {
+  for (const fileName of parsedArgs._) {
+    const fileContents = await Deno.readFile(fileName);
+    const json = JSON.parse(decoder.decode(fileContents));
     print(json);
-  } else {
-    for (const fileName of parsedArgs._) {
-      const fileContents = await Deno.readFile(fileName);
-      const json = JSON.parse(decoder.decode(fileContents));
-      print(json);
-    }
   }
 }
-
-main();
diff --git a/std/examples/curl.ts b/std/examples/curl.ts
index 04dd9d601..e020016f8 100644
--- a/std/examples/curl.ts
+++ b/std/examples/curl.ts
@@ -1,8 +1,4 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-async function curl(url: string): Promise<void> {
-  const res = await fetch(url);
-  await Deno.copy(Deno.stdout, res.body);
-}
-
-await curl(Deno.args[1]);
-Deno.exit(0);
+const url = Deno.args[1];
+const res = await fetch(url);
+await Deno.copy(Deno.stdout, res.body);