Skip to main content

What does | in this code mean?





function foo() {}

var bar = foo <| function() {};







This is the first time I've seen something like this. What does <| mean?





Source: https://github.com/allenwb/ESnext-experiments/blob/master/ST80collections-exp1.js



Source: Tips4all

Comments

  1. Now that you have posted the link to the source, you can see in the comments at the top of the file exactly what it does (line 36):


    the <| operator -- defines the [[Prototype]] of a literal...

    For these examples <| used with a function expression sets the
    [[Prototype]] of the object created as the value of the function's
    "prototype" property to the value of the "prototype" property of the
    the LHS object. This is in addition to setting the [[Prototype]] of
    the function object itself. In other words, it builds sets the
    [[Prototype]] of both the function and of function.prototype to
    potentially different values.

    ReplyDelete
  2. That throws a syntax error for me ("unexpected token" on the "|")

    For A complete list of javascript operators go here

    ReplyDelete
  3. It means syntax error - invalid JavaScript construct.

    ReplyDelete
  4. There's no "<|". I think it's a mistake and there should be "||".

    ReplyDelete

Post a Comment

Popular posts from this blog

[韓日関係] 首相含む大幅な内閣改造の可能性…早ければ来月10日ごろ=韓国

div not scrolling properly with slimScroll plugin

I am using the slimScroll plugin for jQuery by Piotr Rochala Which is a great plugin for nice scrollbars on most browsers but I am stuck because I am using it for a chat box and whenever the user appends new text to the boxit does scroll using the .scrollTop() method however the plugin's scrollbar doesnt scroll with it and when the user wants to look though the chat history it will start scrolling from near the top. I have made a quick demo of my situation http://jsfiddle.net/DY9CT/2/ Does anyone know how to solve this problem?

Why does this javascript based printing cause Safari to refresh the page?

The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex