User:UBX/edit-rate.js

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$(function() {
	// test if user is seeing their own user page.
	// only the current uuser's edit count is available through mw.config
	// but it's possible to get other users' data as well;
	// see [[User:PleaseStand/userinfo.js]] and [[User:UBX/LiveEditCounter.js]] for example
	if( mw.config.get('wgPageName').indexOf('User:' + mw.config.get('wgUserName')) == 0 ) {
		// Get values
		var edits = mw.config.get('wgUserEditCount');
		var date = $('#edit-rate-regdate').text();
		var now = new Date();
		var reg = new Date( date );
	
		// Make calculations
		var diff = Math.abs(now.getTime() - reg.getTime());
		var hours = Math.ceil(diff / (1000 * 60 * 60)); // http://stackoverflow.com/a/3224854/266309
		var rate = Math.round((hours / edits) * 10) / 10; // http://stackoverflow.com/a/11832950/266309
	
		// Show result
		$('#edit-rate').text( rate );
	}
});