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Chapter 2: edits

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Beth Griggs 2020-05-19 12:38:09 +01:00
parent 760ead3fda
commit 1df3b4ec78
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5 changed files with 50 additions and 11 deletions
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5
Chapter02/working-with-files/readWriteAsync.js
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@ -9,8 +9,7 @@ fs.readFile(filepath, "utf8", function (err, contents) {
}
console.log("File Contents:", contents);
const upperContents = contents.toUpperCase();
fs.writeFile(filepath, upperContents, function (err) {
if (err) throw err;
fs.writeFileSync(filepath, upperContents);
console.log("File updated.");
});
});

9
Chapter02/working-with-files/readWriteAsync2.js
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@ -9,14 +9,9 @@ fs.readFile(filepath, "utf8", function (err, contents) {
}
console.log("File Contents:", contents);
const upperContents = contents.toUpperCase();
setTimeout(() => updateFile(filepath, upperContents), 10);
});
function updateFile(filepath, contents) {
fs.writeFile(filepath, contents, function (err) {
fs.writeFile(filepath, upperContents, function (err) {
if (err) throw err;
console.log("File updated.");
});
}
setInterval(() => process.stdout.write("**** \n"), 1).unref();
});

21
Chapter02/working-with-files/readWriteAsyncNamed.js Normal file
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@ -0,0 +1,21 @@
const fs = require("fs");
const path = require("path");
const filepath = path.join(process.cwd(), "hello.txt");
fs.readFile(filepath, "utf8", function (err, contents) {
if (err) {
return console.log(err);
}
console.log("File Contents:", contents);
const upperContents = contents.toUpperCase();
updateFile(filepath, upperContents);
});
function updateFile(filepath, contents) {
fs.writeFile(filepath, contents, function (err) {
if (err) throw err;
console.log("File updated.");
});
}

23
Chapter02/working-with-files/readWriteAsyncTimeout.js Normal file
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@ -0,0 +1,23 @@
const fs = require("fs");
const path = require("path");
const filepath = path.join(process.cwd(), "hello.txt");
fs.readFile(filepath, "utf8", function (err, contents) {
if (err) {
return console.log(err);
}
console.log("File Contents:", contents);
const upperContents = contents.toUpperCase();
setTimeout(() => updateFile(filepath, upperContents), 10);
});
function updateFile(filepath, contents) {
fs.writeFile(filepath, contents, function (err) {
if (err) throw err;
console.log("File updated.");
});
}
setInterval(() => process.stdout.write("**** \n"), 1).unref();

1
Chapter02/working-with-files/readWriteSync.js
View File

@ -7,5 +7,6 @@ const contents = fs.readFileSync(filepath, "utf8");
console.log("File Contents:", contents);
const upperContents = contents.toUpperCase();
fs.writeFileSync(filepath, upperContents);
console.log("File updated.");