D3.js：无法将json和csv合并

Question

I want to create a map with the static map in a json file and the dynamic data in a csv file. The map displays but the dynamic data from the cvs file is not working. I've attempted to follow mbostock's explanations but so far I can't get the join to work. Here is the code:

d3.json("/sites/default/d3_files/json/toronto-wards.json", function(error,wards) {
   var csvData;
d3.csv("/csv-pledges", function(error, csv) 
{
    csvData = csv;

   alert ("Hello" +csvData); // this displays

joinJsonCsv(csvData);
   alert ("Bye"); // doesn't display 
}); // end d3.csv

function joinJsonCsv(csv) {
// do something with rows
  alert ("joinJsonCsv" +csv); // this displays
   csv.forEach(function(d, i) {
     alert("the value of e.SCODE_NAME is: "+e.SCODE_NAME); // doesn't display
        world.forEach(function(e, j) {
            if (d.ward_no === e.SCODE_NAME) 
            {  
                e.NAME = d.ward_no
            } // end ward test
        }) // end world loop loop
    })// end of csv loop
alert ("exit joinJsonCsv"); // this doesn't display
} // end joinJsonCsv

What am I missing?

Answer 1

You were referencing the e object outside of its scope so the function was crashing. I moved the alert so that e is defined, it should work now. d3.json("/sites/default/d3_files/json/toronto-wards.json", function(error,wards) { var csvData; d3.csv("/csv-pledges", function(error, csv) { csvData = csv;

   alert ("Hello" +csvData); // this displays

joinJsonCsv(csvData);
   alert ("Bye"); // doesn't display 
}); // end d3.csv

function joinJsonCsv(csv) {
// do something with rows
  alert ("joinJsonCsv" +csv); // this displays
   csv.forEach(function(d, i) {
        world.forEach(function(e, j) {
            alert("the value of e.SCODE_NAME is: "+e.SCODE_NAME); // try this maybe
            if (d.ward_no === e.SCODE_NAME) 
            {  
                e.NAME = d.ward_no
            } // end ward test
        }) // end world loop loop
    })// end of csv loop
alert ("exit joinJsonCsv"); // this doesn't display
} // end joinJsonCsv