Introduction
If you need to alter Node.JS
server or JavaScript client console.log
function w/o
the vsprintf library,
dynamically build the util.format
command and execute with JavaScript eval()
.
Using the Code
Place the following code in your file to replace the default console.log
function:
util = require('util');
console.log = function(a) {
if (arguments.length>1) {
var cmd = 'util.format(';
for (i in arguments) {
if (i>0)
cmd += ',';
cmd += 'arguments['+i+']';
}
cmd += ')';
util.log(eval(cmd));
}
else
util.log(a);
};
This is much better:
util = require('util');
console.log = function() {
process.stdout.write((new Date()).toISOString().substring(0,19).replace('T', ' ')+': ');
process.stdout.write(util.format.apply(this, arguments) + '\n');
};
History
- September 15, 2013 - First version.
- October 31, 2013 - Found a better way to do the same thing.