docs: simplify dirname declaration

Author: wdavidw

packages/csv-parse/samples/columns-discovery.js

@@ -2,9 +2,7 @@
 import fs from 'fs';
 import { parse } from 'csv-parse';
 
-import { dirname } from 'path';
-import { fileURLToPath } from 'url';
-const __dirname = dirname(fileURLToPath(import.meta.url));
+const __dirname = new URL( '.', import.meta.url).pathname
 
 // Using the first line of the CSV data to discover the column names
 const rs = fs.createReadStream(__dirname+'/columns-discovery.in');

packages/csv-parse/samples/fs_read.js

@@ -2,9 +2,7 @@
 import fs from 'fs';
 import { parse } from 'csv-parse';
 
-import { dirname } from 'path';
-import { fileURLToPath } from 'url';
-const __dirname = dirname(fileURLToPath(import.meta.url));
+const __dirname = new URL( '.', import.meta.url).pathname
 
 const parser = parse({delimiter: ';'}, function(err, data){
   console.log(data);

packages/csv-parse/samples/recipe.async.iterator.coffee

@@ -2,9 +2,7 @@
 import fs from 'fs'
 import { parse } from 'csv-parse'
 
-import { dirname } from 'path'
-import { fileURLToPath } from 'url';
-__dirname = dirname fileURLToPath `import.meta.url`
+const __dirname = new URL( '.', import.meta.url).pathname
 
 processFile = () ->
   records = []

packages/csv-parse/samples/recipe.async.iterator.js

@@ -2,9 +2,7 @@
 import fs from 'fs';
 import { parse } from 'csv-parse';
 
-import { dirname } from 'path';
-import { fileURLToPath } from 'url';
-const __dirname = dirname(fileURLToPath(import.meta.url));
+const __dirname = new URL( '.', import.meta.url).pathname
 
 const processFile = async () => {
   const records = [];