That a character is reserved within a generic URL component doesn’t mean it must be escaped when it appears within the component or within data in the component. The character must also be defined as a delimiter within the generic or scheme-specific syntax and the appearance of the character must be within data. The current … Read more
The javascript interpreter/compiler is so smart to only insert automatic semicolons if afterwards there is valid Javascript. Your code works, because && b as it stands is no valid expression – that’s why no semicolon gets inserted after the return a resulting in: return a && b && c; However: return (undefined);//implicitely inserted { …. … Read more
The CSS Grid spec developers decided to use identifiers instead of strings, when defining named grid areas with the grid-area property, for the sake of consistency with the rest of CSS. The vast majority of CSS properties use identifiers, not strings, for their values. (Notable exceptions to this rule include font-family, content and grid-template-areas, which … Read more
I understand the expectation for array.push() to return the mutated array instead of its new length. And the desire to use this syntax for chaining reasons. However, there is a built in way to do this: array.concat(). Note that concat expects to be given an array, not an item. So, remember to wrap the item(s) … Read more
It has to do with how the browser packages binary and form data for transmission over HTTP. By default only form data is sent, but if the form needs to support uploading a file, then the binary data must also be appended and separated from the form data. Scott Hanselman gives a good explanation of … Read more
So What is the difference between the terms “thenable” and “promise”? I think the section you’ve already cited does answer this very well: A thenable is an object with a then method. Any object. A promise is an object with a then method (i.e. a thenable) that conforms to the specification. So far so simple. … Read more
The @ symbol allows you to use reserved word. For example: int @class = 15; The above works, when the below wouldn’t: int class = 15;
Yes, you need quotation marks. This is to make it simpler and to avoid having to have another escape method for javascript reserved keywords, ie {for:”foo”}.
Straight from the C# Language Specification, Identifiers (C#) : The prefix “@” enables the use of keywords as identifiers, which is useful when interfacing with other programming languages. The character @ is not actually part of the identifier, so the identifier might be seen in other languages as a normal identifier, without the prefix. An … Read more
I know this is an old post but it is still very relevant. I have found that modern browsers support rfc5987, which allows utf-8 encoding, percentage encoded (url-encoded). Then Naïve file.txt becomes: Content-Disposition: attachment; filename*=UTF-8”Na%C3%AFve%20file.txt Safari (5) does not support this. Instead you should use the Safari standard of writing the file name directly in … Read more