d3.js传递绑定函数似乎无法执行该函数

Question

I am trying to reuse some code that makes x-axis ticks. Here is the method I've put it in:

xTicks: (scale, dayTickFormat) ->
    d3.svg.axis().scale(scale).orient("bottom")
    .ticks(d3.time.days, 1)
    .tickSize(10)
    .tickFormat(dayTickFormat)
    .tickPadding(8)

Please pardon the coffeescript :\\

Anyway, I here is the code that calls that:

drawTicks: (chart, chartOptions, margin, x, y, num_y_ticks) ->

    xTickGroup = chart.append("g").attr("class", "day-ticks")
    .call(@xTicks.bind(@, x, dayTickFormat))
    .attr("transform", "translate(#{chartOptions.offset.left}, #{chartOptions.height - 10})")

When this code executes, I don't get any ticks. I'm stumped. Any thoughts?

Answer 1

OK, nvm, I got it.

call() wasn't calling the "d3.svg.axis()" bit, it was calling the method I had wrapped around it. So, if I store my method in a variable like so:

xTicks = @xTicks(x, dayTickFormat)

I can call it more simply like this:

xTickGroup = chart.append("g").attr("class", "day-ticks")
.call(xTicks)
.attr("transform", "translate(#{chartOptions.offset.left}, #{chartOptions.height - 10})")

Hope this helps someone, someday :\\