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#JavaScript

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• SnippetMar 19, 2012

  jQuery getJSON

  Populate a dropdown list from a JSON service using $.getJSON and $.each.

  $.getJSON("URL", null,
     function (data) {
        $.each(data.d, function (i, result) {
           var optionText = "<option value='" + result.value + "'>"
              + result.text + "</option>";
           $('#ddlSelectTagId').append(optionText);

  1 min read#JavaScript#jQuery
• SnippetMar 19, 2012

  jQuery Clearing DropDown

  The fastest way to empty a select element: replace it with a shallow copy of itself.

  function ClearOptions(id) {
      var selectObj = document.getElementById(id);
      var selectParentNode = selectObj.parentNode;
      var newSelectObj = selectObj.cloneNode(false); // shallow copy, no options
      selectParentNode.replaceChild(newSelectObj, selectObj);
      return newSelectObj;

  1 min read#JavaScript#jQuery
• SnippetMar 19, 2012

  jQuery Ajax Call

  A reusable $.ajax template for calling a JSON service with success and error callbacks.

  $.ajax({
     url: GETURL,
     type: "GET",
     contentType: "application/json; charset=utf-8",
     dataType: "json",
     success: successCallback,

  1 min read#JavaScript#jQuery
• SnippetMar 17, 2012

  jQuery Split String

  Split a string on a delimiter using the built-in JavaScript split function.

  var split = 'john smith#5551234567'.split('#');
  
  var name = split[0];   // john smith
  var mobile = split[1]; // 5551234567

  1 min read#JavaScript#jQuery
• SnippetMar 17, 2012

  jQuery Remove Select Tag Duplicates

  Remove duplicate options from a select element with a short jQuery loop.

  var usedDisplayNames = {};
  $("select[name='tagname'] > option").each(function () {
      if (usedDisplayNames[this.text]) {
          $(this).remove();
      } else {
          usedDisplayNames[this.text] = this.value;

  1 min read#JavaScript#jQuery