State and config in a function

arrow.js

function logger( state, msg ) {
	state.count++
	console.log( state.count, this.msg )
}

var log = () => logger( {count:0}, "Calling from an arrow function" )

log()
log()
log()

bind.js

function logger() {
	this.count++
	console.log( this.count, this.msg )
}

var log = logger.bind({
	count: 0,
	msg: "Logging from a bound function"
})

log()
log()
log()

closure.js

function createLogger( msg ) {
	var count = 0
	return function() {
		count++
		console.log( count, msg )
	}
}

var log = createLogger( "Trapping variables in a closure" )

log()
log()
log()

oo.js

function Logger( msg ) {
	this.msg = msg
	this.count = 0
}

Logger.prototype.log = function() {
	this.count++
	console.log( this.count, this.msg )
}

var logger = new Logger("A typical Object Oriented logger")

logger.log()
logger.log()
logger.log()

partial.js

function logger( state, msg ) {
	state.count++
	console.log( state.count, this.msg )
}

var log = _.partial( logger, {count:0}, "Calling from a partially applied function" )

log()
log()
log()