How to pop an alert message box using PHP?
You could use Javascript:
javascript
Cannot read property ‘push’ of undefined when combining arrays
You get the error because order[1] is undefined. That error message means that somewhere in your code, an attempt is being made to access a property with some name (here it’s “push”), but instead of an object, the base for the reference is actually undefined. Thus, to find the problem, you’d look for code that … Read more
JQuery – $ is not defined
That error can only be caused by one of three things: Your JavaScript file is not being properly loaded into your page You have a botched version of jQuery. This could happen because someone edited the core file, or a plugin may have overwritten the $ variable. You have JavaScript running before the page is … Read more
Chrome sendrequest error: TypeError: Converting circular structure to JSON
It means that the object you pass in the request (I guess it is pagedoc) has a circular reference, something like: JSON.stringify cannot convert structures like this. N.B.: This would be the case with DOM nodes, which have circular references, even if they are not attached to the DOM tree. Each node has an ownerDocument which refers to document in most … Read more
Getting a UnhandledPromiseRejectionWarning when testing using mocha/chai
The issue is caused by this: If the assertion fails, it will throw an error. This error will cause done() never to get called, because the code errored out before it. That’s what causes the timeout. The “Unhandled promise rejection” is also caused by the failed assertion, because if an error is thrown in a … Read more
Get String in YYYYMMDD format from JS date object?
Altered piece of code I often use:
Sort array of objects by string property value
It’s easy enough to write your own comparison function: Or inline (c/o Marco Demaio):
Pure JavaScript equivalent of jQuery’s $.ready() – how to call a function when the page/DOM is ready for it [duplicate]
The simplest thing to do in the absence of a framework that does all the cross-browser compatibility for you is to just put a call to your code at the end of the body. This is faster to execute than an onload handler because this waits only for the DOM to be ready, not for all images … Read more
Array.size() vs Array.length
Array.size() is not a valid method Always use the length property There is a library or script adding the size method to the array prototype since this is not a native array method. This is commonly done to add support for a custom getter. An example of using this would be when you want to … Read more
Array of JSON Objects
I am trying to re-implement a page using JSON instead of some 2-dimensional arrays. What I am hoping to accomplish is get an array of objects. The objects would look like this: I want to create an array of these restaurant objects and populate the distance field with some logic, then sort the array based … Read more