如何从dict中提取键和值，并使用javascript将它们存储在变量中

Question

I have a dictionary like:

db_dict={'Col1': ['1', '2', '3', '4'], 'Col2': ['2', '4', '6'], ...}

I want to make a string like this:

var simpleQuery = "col1={'1', '2', '3', '4'}&col2={'2', '4', '6'}"

So far I've tried this:

function getdbdict() {
{ %
    for key, values in dbdict.items %
}
var col = '{{key}}';
var val = '{{values}}';
var colval = col + '=' + '{' + '"' + val + '"' + '}'; { % endfor %
}
var simpleQuery = colval

I am a newbie, Please help me doing this.

Answer 1

This'll do it:

var db_dict={'Col1': ['1', '2', '3', '4'], 'Col2': ['2', '4', '6']};

var workingArray = []
for (var key in db_dict) {
    if (db_dict[key].length > 0)
        workingArray.push(key.toLowerCase() + "={'" + db_dict[key].join("','") + "'}");
    else
        workingArray.push(key.toLowerCase() + "={}");
}

var simpleQuery = workingArray.join("&");

console.log(simpleQuery);  // col1={'1','2','3','4'}&col2={'2','4','6'} 

Your sample took the original object's key names and made them lowercase in simpleQuery , so I've done the same; obviously you can just remove the .toLowerCase() if that isn't needed.

Demo: http://jsfiddle.net/8rZHF/2/

Answer 2

You can try the following

db_dict={'Col1': ['1', '2', '3', '4'], 'Col2': ['2', '4', '6']};
var str = "";
for(var key in db_dict){
  str +=key +"={";
  for(var i=0;i<db_dict[key].length; i++){
    str += db_dict[key][i];
    if(i != db_dict[key].length-1)
      str +=",";
  }
  str+="}";
  str+="&";
}
str = str.substring(0, str.length - 1);

You can see it in action here

I am sure it can be refactored but it is just to give you an idea.