SharePoint client APIs

You can use the SharePoint client object model (CSOM) to retrieve, update, and manage data in SharePoint 2013. SharePoint 2013 makes the CSOM available in several forms.

• .NET Framework redistributable assemblies
• JavaScript library
• REST/OData endpoints
• Windows Phone assemblies
• Silverlight redistributable assemblies

JavaScript provides 8 mathematical constants that can be accessed with the Math object

Math.E;         // returns Euler's numberMath.PI         // returns PIMath.SQRT2      // returns the square root of 2Math.SQRT1_2    // returns the square root of 1/2Math.LN2        // returns the natural logarithm of 2Math.LN10       // returns the natural logarithm of 10Math.LOG2E      // returns base 2 logarithm of EMath.LOG10E     // returns base 10 logarithm of E

Javascript Math object is to create a random number

Math.random();  

asp.net serialized object in json

   //Group  data
                var lstGroupedPMs = (from lstPMItem in lstPMItemsDetails
                                     group lstPMItem by lstPMItem.KRAType
                                         into KRAMasterGroups
                                         select new
                                         {
                                             KRAType = KRAMasterGroups.Key,
                                             kraGroup = KRAMasterGroups,
                                             templateName = performancetemplatedata.TemplateName,
                                             positionID = performancetemplatedata.PositionID,
                                             designation = performancetemplatedata.Designation
                                         });


                json = JsonConvert.SerializeObject(lstGroupedPMs, Newtonsoft.Json.Formatting.Indented);
                jObject = JObject.Parse("{\"data\": " + json + "}");

asp.net get list of items from listitemcollection

List<CustomEntities.KRAMasterDetails> lstPMItemsDetails =
                    (from oKRAMasterItem in oPMItems.AsEnumerable()
                     select new CustomEntities.KRAMasterDetails
                     {
                         KRAName = null == oKRAMasterItem[Constant.KRAMaster.KRAName.ToString()] ? string.Empty :
                         oKRAMasterItem[Constant.KRAMaster.KRAName.ToString()].ToString(),

                         //added by shekhar 4/2/2015
                         KRADescription = null == oKRAMasterItem[Constant.KRAMaster.KRADescription.ToString()] ? string.Empty :
                         oKRAMasterItem[Constant.KRAMaster.KRADescription.ToString()].ToString(),

                         KRAMeasuringCriteria = null == oKRAMasterItem[Constant.KRAMaster.KRAMeasuringCriteria.ToString()] ? string.Empty :
                         oKRAMasterItem[Constant.KRAMaster.KRAMeasuringCriteria.ToString()].ToString(),
                         //End of added by shekhar 4/2/2015

                         KRAType = null == oKRAMasterItem[Constant.KRAMaster.KRAType.ToString()] ? string.Empty :
                         (oKRAMasterItem[Constant.KRAMaster.KRAType.ToString()] as FieldLookupValue).LookupValue,

                         KRASubType = null == oKRAMasterItem[Constant.KRAMaster.KRASubType.ToString()] ? string.Empty :
                         (oKRAMasterItem[Constant.KRAMaster.KRASubType.ToString()] as FieldLookupValue).LookupValue,

                         //Updated by shekhar/vikas 3/2/2015
                         KRATypeID = null == oKRAMasterItem[Constant.KRAMaster.KRAType.ToString()] ? 0 :
                         (oKRAMasterItem[Constant.KRAMaster.KRAType.ToString()] as FieldLookupValue).LookupId,

                         KRASubTypeID = null == oKRAMasterItem[Constant.KRAMaster.KRASubType.ToString()] ? 0 :
                         (oKRAMasterItem[Constant.KRAMaster.KRASubType.ToString()] as FieldLookupValue).LookupId


                     }).ToList();

asp.net get item from listitemcollection

 performancetemplatedata.TemplateName = (oPMDataItems[0][Constant.PerformanceTemplateData.TemplateName.ToString()]).ToString();
                performancetemplatedata.Designation = (oPMDataItems[0][Constant.PerformanceTemplateData.PositionID.ToString()] as FieldLookupValue).LookupValue;
                performancetemplatedata.PositionID = (oPMDataItems[0][Constant.PerformanceTemplateData.PositionID.ToString()] as FieldLookupValue).LookupId;

Javascript Table of Factorials

<!-- This example is from the book _JavaScript: The Definitive Guide_.     -->
<!-- Written by David Flanagan.  Copyright (c) 1996 O'Reilly & Associates. -->
<!-- This example is provided WITHOUT WARRANTY either expressed or implied.-->
<!-- You may study, use, modify, and distribute it for any purpose.        -->
<HTML>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
document.write("<h2>Table of Factorials</h2>");
for(i = 1, fact = 1; i < 10; i++, fact *= i) {
    document.write(i + "! = " + fact);
    document.write("<br>");
}
</SCRIPT>
</BODY>
</HTML>