I Hi all, I'm new to javascript/D3.js programming. I need to adjust a code and I feel a bit lost.
The main question is : how to save a JSON dataset in javascript
The current code is loading a big csv file, parsing and formatting it.
I want to move the file-management part in another program, but to directly get the well formatted file, I would like to save it directly by running this code and saving the output (which is: json = buildHierarchy(csv);).
Thank you for your help !
d3.text("myfile.csv", function(text) {
var csv = d3.csv.parseRows(text);
var json = buildHierarchy(csv); //-- THIS IS WHAT I NEED TO SAVE (OR SEE)
});
// function to adjust data
function buildHierarchy(csv) {
var root = {"name": "root", "children": []};
for (var i = 0; i < csv.length; i++) {
var sequence = csv[i][0];
var size = +csv[i][1];
if (isNaN(size)) { // e.g. if this is a header row
continue;
}
var parts = sequence.split("-");
var currentNode = root;
for (var j = 0; j < parts.length; j++) {
var children = currentNode["children"];
var nodeName = parts[j];
var childNode;
if (j + 1 < parts.length) {
// Not yet at the end of the sequence; move down the tree.
var foundChild = false;
for (var k = 0; k < children.length; k++) {
if (children[k]["name"] == nodeName) {
childNode = children[k];
foundChild = true;
break;
}
}
// If we don't already have a child node for this branch, create it.
if (!foundChild) {
childNode = {"name": nodeName, "children": []};
children.push(childNode);
}
currentNode = childNode;
} else {
// Reached the end of the sequence; create a leaf node.
childNode = {"name": nodeName, "size": size};
children.push(childNode);
}
}
}
return root;
};