Questions tagged [wrap-function]
7 questions
4
votes
2 answers
(javascript) why do i need to use a wrap function for event handlers?
I'm trying to understand why in the following code I need Dragger.prototype.wrap and why I can't just use the event handling methods directly:
function Dragger(id) {
this.isMouseDown = false;
this.element = document.getElementById(id);
…
Tony Stark
- 24,588
- 41
- 96
- 113
1
vote
2 answers
r - Wrap function only showing result of last function
I'm attempting to write my first wrap function, showing the mean, variance, stdev, and summary for a vector in r
des_function = function(y)
{
mean(y);
var(y);
sd(y);
summary(y);
}
des_function(even)
but it's only showing the results of…
William Silvia
- 13
- 2
1
vote
1 answer
How to iterate over list to incorporate it in a wrap widget?
I am trying to restrict the items(Containers) in the Row to 8 and if there are more items, they should be wrapped. I have a list of Containers but I can not use listView as children of Wrap since listView scrolls. Is there any way to get this layout…
Shubhra Deshpande
- 107
- 2
- 11
1
vote
3 answers
how to override a returned nested method in javascript?
Say I'm using a library with the code that looks like below:
(function($)
{
function Library(el, options)
{
return new Library.prototype.init(el, options);
}
Library.fn = $.Library.prototype = {
init: function(el,…
funkyeah
- 3,074
- 5
- 28
- 47
0
votes
1 answer
Node JS error: Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
I am trying to implement authentication in my app. However, app is throwing cannot set header error when registering user.
I am not able to wrap my head around why passing thru error handling function "wrapAsync" is thrown this error.
Error…
Nishan Baral
- 1
- 1
0
votes
0 answers
Javascript wrapped function and this keyword
I'm learning about "bind", and I found there is another way of using the wrap function, without using "bind". I can code like below.
let user = {
firstName: "John",
sayHi() {
alert(`Hello, ${this.firstName}!`);
}
};
//using wrap function…
aya2222
- 27
- 3
0
votes
1 answer
(javascript) what is the wrap function used for regarding event handlers?
I'm trying to understand why people use a wrap function for my event handlers. For example:
Example.prototype.wrap = function(obj, method) {
return function(event) {
obj[method](event);
}
}
Basically, what is wrap used for?
Edit: From…
Tony Stark
- 24,588
- 41
- 96
- 113