WebFund 2016W: Tutorial 1: Difference between revisions
Created page with "'''This tutorial is not yet finalized.''' ==Code== ===simplegrep_sync.js=== <code lang="javascript"> var fs = require('fs'); if (process.argv.length < 4) { console.er..." |
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===simplegrep_sync.js=== | ===simplegrep_sync.js=== | ||
< | <lstlisting lang="javascript"> | ||
var fs = require('fs'); | var fs = require('fs'); | ||
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} | } | ||
} | } | ||
</ | </lstlisting> | ||
===simplegrep_async.js=== | ===simplegrep_async.js=== | ||
Revision as of 02:38, 11 January 2016
This tutorial is not yet finalized.
Code
simplegrep_sync.js
<lstlisting lang="javascript"> var fs = require('fs');
if (process.argv.length < 4) {
console.error('Not enough parameters given. Try this: ' +
'"node findinfile_sync term filename.txt"');
process.exit(1);
}
var searchterm = process.argv[2]; var filename = process.argv[3];
var rawContents = fs.readFileSync(filename, 'utf-8'); var lines = rawContents.split('\n');
for (i = 0; i < lines.length; i++) {
if (lines[i].indexOf(searchterm) > -1) {
console.log(lines[i]);
}
} </lstlisting>
simplegrep_async.js
var fs = require('fs');
if (process.argv.length < 4) {
console.error('Not enough parameters given. Try this: ' +
'"node findinfile_sync term filename.txt"');
process.exit(1);
}
var searchterm = process.argv[2];
var filename = process.argv[3];
var returnMatches = function(err, rawContents) {
var lines = rawContents.split('\n');
lines.forEach(function(theLine) {
if (theLine.indexOf(searchterm) > -1) {
console.log(theLine);
}
});
}
fs.readFile(filename, 'utf-8', returnMatches);