feat(m4): add solution exe-002 display-the-tail-of-a-file

projects/m4/001-display-the-head-of-a-file/js/index.js

@@ -0,0 +1,19 @@
+const { readFile } = require('fs/promises');
+
+let filePath1 = './example1.txt';
+let filePath2 = './example2.txt';
+
+readFile(filePath1).then((data1) => {
+    console.log(data1.toString().split('\r\n').slice(-11).join('\r\n'));
+    console.log(data1.toString().split('\r\n').slice(-6).join('\r\n'));
+    console.log(data1.toString().split('\r\n').slice(-6, -3).join('\r\n'));
+});
+
+Promise.all([readFile(filePath1), readFile(filePath2)])
+    .then(([data1, data2]) => {
+        console.log(data1.toString().split('\r\n').slice(-2).join('\r\n'));
+        console.log(data2.toString().split('\r\n').slice(-2).join('\r\n'));
+    })
+    .catch((error) => {
+        console.log(error);
+    });

projects/m4/002-display-the-tail-of-a-file/js/example1.txt

@@ -0,0 +1,24 @@
+Line 1: This is the first line.
+Line 2: This is the second line.
+Line 3: This is the third line.
+Line 4: This is the fourth line.
+Line 5: This is the fifth line.
+Line 6: This is the sixth line.
+Line 7: This is the seventh line.
+Line 8: This is the eighth line.
+Line 9: This is the ninth line.
+Line 10: This is the tenth line.
+Line 11: This is the eleventh line.
+Line 12: This is the twelfth line.
+Line 13: This is the thirteenth line.
+Line 14: This is the fourteenth line.
+Line 15: This is the fifteenth line.
+Line 16: This is the sixteenth line.
+Line 17: This is the seventeenth line.
+Line 18: This is the eighteenth line.
+Line 19: This is the nineteenth line.
+Line 20: This is the twentieth line.
+Line 21: This is the twenty-first line.
+Line 22: This is the twenty-second line.
+Line 23: This is the twenty-third line.
+Line 24: This is the twenty-fourth line.

projects/m4/002-display-the-tail-of-a-file/js/example2.txt

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+Line 1: This is the first line.
+Line 2: This is the second line.
+Line 3: This is the third line.
+Line 4: This is the fourth line.
+Line 5: This is the fifth line.
+Line 6: This is the sixth line.
+Line 7: This is the seventh line.
+Line 8: This is the eighth line.
+Line 9: This is the ninth line.
+Line 10: This is the tenth line.
+Line 11: This is the eleventh line.
+Line 12: This is the twelfth line.
+Line 13: This is the thirteenth line.
+Line 14: This is the fourteenth line.
+Line 15: This is the fifteenth line.
+Line 16: This is the sixteenth line.
+Line 17: This is the seventeenth line.
+Line 18: This is the eighteenth line.
+Line 19: This is the nineteenth line.
+Line 20: This is the twentieth line.
+Line 21: This is the twenty-first line.
+Line 22: This is the twenty-second line.
+Line 23: This is the twenty-third line.
+Line 24: This is the twenty-fourth line.
+Line 25: This is the twenty-fifth line.

projects/m4/002-display-the-tail-of-a-file/js/index.js

@@ -0,0 +1,19 @@
+const { readFile } = require('fs/promises');
+
+let filePath1 = './example1.txt';
+let filePath2 = './example2.txt';
+
+readFile(filePath1).then((data1) => {
+    console.log(data1.toString().split('\r\n').slice(-11).join('\r\n'));
+    console.log(data1.toString().split('\r\n').slice(-6).join('\r\n'));
+    console.log(data1.toString().split('\r\n').slice(-6, -3).join('\r\n'));
+});
+
+Promise.all([readFile(filePath1), readFile(filePath2)])
+    .then(([data1, data2]) => {
+        console.log(data1.toString().split('\r\n').slice(-2).join('\r\n'));
+        console.log(data2.toString().split('\r\n').slice(-2).join('\r\n'));
+    })
+    .catch((error) => {
+        console.log(error);
+    });