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Use rollapply with xts object and an anonymous defined function


Use rollapply with xts object and an anonymous defined function

By : maximiliano paredes
Date : October 17 2020, 08:10 AM
To fix the issue you can do I am not sure if you can apply the rollapply to the entire dataframe. You can apply it to every column separately with lapply and since you want sum of second and third element you can reduce the width as 2 instead
code :
library(zoo)
lapply(dfxts, function(x) rollapply(x, width = 2, FUN=sum))


#$A
#            A
#1970-01-31 NA
#1970-02-01  3
#1970-02-02  5
#1970-02-03  7
#1970-02-04  9
#1970-02-05 11
#1970-02-06 13
#1970-02-07 15
#1970-02-08 17

#$B
#            B
#1970-01-31 NA
#1970-02-01  7
#1970-02-02  9
#1970-02-03 11
#1970-02-04 13
#1970-02-05 15
#1970-02-06 17
#1970-02-07 19
#1970-02-08 21
lapply(dfxts, function(x) rollapply(x, width = 3, FUN=function(y) sum(y[2],y[3])))
rollapply(dfxts, width = 3, FUN=function(x) coredata(x[2]) +  coredata(x[3]))
rollapply(dfxts, width = 15, FUN=function(x) {
          vals <- coredata(x)
          5*vals[5] - 8*vals[7] + vals[15]
})


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Find out if function is anonymous or is defined in a object

Find out if function is anonymous or is defined in a object


By : Justin W Smith
Date : March 29 2020, 07:55 AM
With these it helps You can use toString() to find out if the function is anonymous assuming it is declared as a named function and not an unnamed function assigned to a variable:
code :
function jim () { var h = "hello"; }
function jeff(func) 
{ 
    var fName;
    var inFunc = func.toString();
    var rExp   = /^function ([^\s]+) \(\)/;
    if (fName = inFunc.match(rExp))
       fName = fName[1];

    alert(fName);
}
jeff(function () { blah(); }); // alert: null;
jeff(function joe () { blah(); }); // alert: "joe";
jeff(jack); // "jack" if jack is function jack () { }, null if jack = function() {} 
var obj = {
    fn: function namedFunction () { }
};
Uncaught Reference Error: $ is not defined (anonymous function) $(function() does not work

Uncaught Reference Error: $ is not defined (anonymous function) $(function() does not work


By : Robson Santos
Date : March 29 2020, 07:55 AM
I hope this helps you . Looks like the links for jquery and jquery ui are throwing a 504. Hence the error. https:// does not work.
Try this:
code :
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script language="Javascript" type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script language="Javascript" type="text/javascript" src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
Bind a function defined in an anonymous object

Bind a function defined in an anonymous object


By : Jim S
Date : March 29 2020, 07:55 AM
To fix this issue I'm writing a SAPUI5 application that have a sap.m.Table loaded at runtime. I want to use a factory method defined inside the controller (is this the best way?). To do this, after the aquiring of the model, I have to bind my table's aggregation (items) to that model: , If you wanna attach the function to the factory:
code :
this.tableFactory.bind(this)
this.tableFactory.call(this)

this.tableFactory.apply(this)
how to use a defined event handler function instead of anonymous function in plugins (slick slider)

how to use a defined event handler function instead of anonymous function in plugins (slick slider)


By : Younghun jung
Date : March 29 2020, 07:55 AM
around this issue I know how to use a event handler functions for click, scroll and other default events. Currently I am using a slider plugin called slick slider and its working fine, I want to replace my event handlers with defined functions instead of anonymous function. , Just pass the function reference
code :
$(slick).on('afterChange', myFunctionName);
function myFunctionName(slick, currentSlide){}
ReferenceError: document is not defined at Object.<anonymous>

ReferenceError: document is not defined at Object.<anonymous>


By : vladutz
Date : September 29 2020, 07:00 AM
hop of those help? You are running in Node.js, which does not have a window or document. If you want to run it in a browser, add the script tag to an html file and run the html file in the browser.
code :
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Hello from the browser</title>
</head>
<body>
  <script src="C:\vs projects\booklistapp\bookapp.js"></script>
</body>
</html>
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