Use Array.prototype.sort(), eg The sort() method accepts a comparator function. This function accepts two arguments (both presumably of the same type) and it’s job is to determine which of the two comes first. It does this by returning an integer Negative (less-than zero): The first argument comes first Positive (greater-than zero): The second argument comes first Zero: The arguments are considered … Read more
Both the code samples you demonstrated in your question make use of prototypal inheritance. In fact any object-oriented code you write in JavaScript is a paradigm of prototypal inheritance. JavaScript simply doesn’t have classical inheritance. This should clear things up a bit: As you can see prototypal inheritance and classical inheritance are two different paradigms … Read more
The first way is easier to maintain. Each declaration is a single statement on a single line, so you can easily add, remove, and reorder the declarations. With the second way, it is annoying to remove the first or last declaration because they start from the var keyword and finish with the semicolon respectively. Every time you … Read more
This is because it is a runtime error, not a “compile time” error. Is there a line number associated with the error? Based on the question being about the spread operator I’ll assume it’s this line: newArticlesData=[…prevData,…response.data]. I assume your prevData is iterable, but is your response data? Try newArticlesData=[…prevData, response.data]? Here’s an example of invalid spread operator use:
In my models/user.js file: And in my router/index.js, I have: which throws the error: If however, in user.js, I do (in the last line) and in index.js I do var User = require(‘../models/User’);, then everything works. But it should not, because in config/pass.js I am doing var User = mongoose.model(‘User’); and it’s working flawlessly. The … Read more
How about removing the onclick attribute and adding an ID: And your script: This way if you need to change the function name or whatever no need to touch the html.
If you know the settings in advance you can define it in a single statement: If you don’t know the values in advance you can just define the top level object and then add properties: Or half-way between the two, define the top level with nested empty objects as properties and then add properties to … Read more
This error is definite mismatch between the data that is advertised in the HTTP Headers and the data transferred over the wire. It could come from the following: Server: If a server has a bug with certain modules that changes the content but don’t update the content-length in the header or just doesn’t work properly. … Read more
If you have to write code for Internet Explorer make sure you chose an implementation, which uses array joins. Concatenating strings with the + or += operator are extremely slow on IE. This is especially true for IE6. On modern browsers += is usually just as fast as array joins. When I have to do lots of string concatenations I usually … Read more
You can’t set X-Frame-Options on the iframe. That is a response header set by the domain from which you are requesting the resource (google.com.ua in your example). They have set the header to SAMEORIGIN in this case, which means that they have disallowed loading of the resource in an iframe outside of their domain. For more information see The X-Frame-Options response header on MDN. A … Read more