Rupert  Beatty

Rupert Beatty

1666830840

NavigationStack is A Stack-modeled UI Navigation Controller

NAVIGATION STACK

Navigation Stack is a library with stack-modeled UI navigation controller.


Requirements

  • iOS 9.0+
  • Xcode 9

Installation

Just add the Source folder to your project.

or use CocoaPods with Podfile:

pod 'Navigation-stack'

or Carthage users can simply add to their Cartfile:

github "Ramotion/navigation-stack"

Usage

YourNavigationController inherit from NavigationStack

add code to root viewViewController

override func viewDidLoad() {
    super.viewDidLoad()
    navigationController!.interactivePopGestureRecognizer?.delegate = self
  }
extension YourViewController: UIGestureRecognizerDelegate {
  func gestureRecognizerShouldBegin(gestureRecognizer: UIGestureRecognizer) -> Bool {

    if navigationController?.viewControllers.count == 2 {
      return true
    }

    if let navigationController = self.navigationController as? NavigationStack {
      navigationController.showControllers()
    }

    return false
  }
}

Download Details:

Author: Ramotion
Source Code: https://github.com/Ramotion/navigation-stack 
License: MIT license

#swift #ios #library #component 

What is GEEK

Buddha Community

NavigationStack is A Stack-modeled UI Navigation Controller
Hertha  Mayer

Hertha Mayer

1595334123

Authentication In MEAN Stack - A Quick Guide

I consider myself an active StackOverflow user, despite my activity tends to vary depending on my daily workload. I enjoy answering questions with angular tag and I always try to create some working example to prove correctness of my answers.

To create angular demo I usually use either plunker or stackblitz or even jsfiddle. I like all of them but when I run into some errors I want to have a little bit more usable tool to undestand what’s going on.

Many people who ask questions on stackoverflow don’t want to isolate the problem and prepare minimal reproduction so they usually post all code to their questions on SO. They also tend to be not accurate and make a lot of mistakes in template syntax. To not waste a lot of time investigating where the error comes from I tried to create a tool that will help me to quickly find what causes the problem.

Angular demo runner
Online angular editor for building demo.
ng-run.com
<>

Let me show what I mean…

Template parser errors#

There are template parser errors that can be easy catched by stackblitz

It gives me some information but I want the error to be highlighted

#mean stack #angular 6 passport authentication #authentication in mean stack #full stack authentication #mean stack example application #mean stack login and registration angular 8 #mean stack login and registration angular 9 #mean stack tutorial #mean stack tutorial 2019 #passport.js

Mckenzie  Osiki

Mckenzie Osiki

1623906928

How To Use “Model Stacking” To Improve Machine Learning Predictions

What is Model Stacking?

Model Stacking is a way to improve model predictions by combining the outputs of multiple models and running them through another machine learning model called a meta-learner. It is a popular strategy used to win kaggle competitions, but despite their usefulness they’re rarely talked about in data science articles — which I hope to change.

Essentially a stacked model works by running the output of multiple models through a “meta-learner” (usually a linear regressor/classifier, but can be other models like decision trees). The meta-learner attempts to minimize the weakness and maximize the strengths of every individual model. The result is usually a very robust model that generalizes well on unseen data.

The architecture for a stacked model can be illustrated by the image below:

#tensorflow #neural-networks #model-stacking #how to use “model stacking” to improve machine learning predictions #model stacking #machine learning

UI Designer Vs UI Developer

Comparing UI Designers to UI Developers
User interface (UI) designers and developers are directly responsible for the consumer base’s experience using an application or software program. Designers specifically deal with the visual aspects of the program, while developers deal with the overall performance and functionality of the software.
To get in depth knowledge on UI, enrich your skills on UI online training Course

Responsibilities of UI Designers vs. UI Developers
UI designers and developers work in tandem to create a program or application that is easy to understand and operate by their customers or clients. Though there may be some occasional overlap in the duties within the workplace, their designated duties are quite clear and are dependent on the other. UI developers are responsible for the coding and programming in the conception of an application, specifically with regard to how the software operates at the hands of the user. UI designers are in charge of applying their understanding of the program operations to create a visual experience that is most compatible to the program’s functionality.

UI Designers
User interface designers are tasked with understanding the programming language of the application in creation so that they can conceptualize and craft visual aspects that will facilitate usage of the program. They are expected to understand computer programming as well as graphic design due to the demands of their work, since they are in charge of incorporating their designs into the program correctly. Their designs are implemented into the layout, which is typically drafted by the developers, while the style of their designs is contingent on the guidelines given by the directors. Once these designs are finished, they must implement them into the program and run a demo of it for the developers and directors to ensure they met the needs and expectations of the project while ensuring there aren’t any bugs caused from their designs. Get more skills from UI Training

Other responsibilities of UI designers are as follows:

  • Make drafts in graphic design and editing software
  • Select fonts and determine color schemes, for consistency
  • Proficiency in programming codes such as Java or CSS
  • Create storyboards and test runs of animated, visual concepts

UI Developers
User interface developers are responsible for the functional aspects of a software application, coding and programming throughout all stages of development with the clients and potential users of the application in mind. They usually begin the process by incorporating the clients’ expressed needs into a layout that is modified as progress is made. Once they get the general functions working, the designers will incorporate their visual conceptions into the layout to ensure that the first draft is operational. If there are any bugs or malfunctions to fix, the developers must troubleshoot and patch the application. While doing these tasks, they must take detailed notes of all the progress made to streamline any future updates made to the program, functionally or aesthetically. Learn more from ui design course

UI developers will also be responsible for:

  • Utilizing research data to improve or build onto the design of the application
  • Suggesting any software updates to improve functionality
  • Constructing diagrams that will aide other developers and programmers on the project
  • Performing test runs of the application

#ui design course #ui training #online ui training #ui online course #ui online training #advanced ui design course

UX designer ? UI designer ? UI Developer ?

The UX designer is someone who thinks about what should the user flow be like, which page should lead to which page, when should a confirm popup appear or not appear, should there be a listing page before or after a create-new page, should there be an address field in the page or geolocation is enough to serve the purpose? After brainstorming through each of these and several other questions, the UX designer comes up with something known as wireframes, which in simple terms is just a blueprint of the website/app.
This is image title

To get in-Depth knowledge on UI Design you can enroll for a live demo on UI online training

The UI designer then takes the wireframes and makes them beautiful, also ensuring that the workflow of the product is communicated well to the user. He will add the pixel level details to the wireframes. What should be the font used, what should be the background image, do we need a background image, what should be the foreground color, how big should be the submit button, does it make more sense to have the menu at the bottom of the screen, what should the logo look like? The job of a UI designer is answering all these and thereafter delivering static mockups, using may be Photoshop, Invision and many other design tools.

The UI developer is the one who puts these static mockups in “real code”. They might need skills like HTML CSS , precompilers(like sass or less) , UI frameworks (like bootstrap or foundation), or xml layouts( in case of android UI) or a combined knowledge of all of them with Javascript (in case of react, react native). The result is a beautiful set of screens/pages which can be actually rendered in a browser or a mobile device.Learn more from ui design course

#ui online course #ui design course #ui training #online ui training #ui courses online #ui design classes online

Corey Brooks

Corey Brooks

1657254050

Top 9+ Common CSS Mistakes To Avoid

In this tutorial, we'll summarise what the top 9+ CSS mistakes are and how to avoid them.

Top 9+ Common CSS Mistakes To Avoid

It’s easy to get tripped up with CSS. Here are some common CSS mistakes we all make.

1. Not Using a Proper CSS Reset

Web browsers are our fickle friends. Their inconsistencies can make any developer want to tear their hair out. But at the end of the day, they’re what will present your website, so you better do what you have to do to please them.

One of the sillier things browsers do is provide default styling for HTML elements. I suppose you can’t really blame them: what if a “webmaster” chose not to style their page? There has to be a fallback mechanism for people who choose not to use CSS.

In any case, there’s rarely a case of two browsers providing identical default styling, so the only real way to make sure your styles are effective is to use a CSS reset. What a CSS reset entails is resetting (or, rather, setting) all the styles of all the HTML elements to a predictable baseline value. The beauty of this is that once you include a CSS reset effectively, you can style all the elements on your page as if they were all the same to start with.

It’s a blank slate, really. There are many CSS reset codebases on the web that you can incorporate into your work. I personally use a modified version of the popular Eric Meyer reset and Six Revisions uses a modified version of YUI Reset CSS.

You can also build your own reset if you think it would work better. What many of us do is utilizing a simple universal selector margin/padding reset.

* { margin:0; padding:0; } 

Though this works, it’s not a full reset.

You also need to reset, for example, borders, underlines, and colors of elements like list items, links, and tables so that you don’t run into unexpected inconsistencies between web browsers. Learn more about resetting your styles via this guide: Resetting Your Styles with CSS Reset.

2. Over-Qualifying Selectors

Being overly specific when selecting elements to style is not good practice. The following selector is a perfect example of what I’m talking about:

ul#navigation li a { ... } 

Typically the structure of a primary navigation list is a <ul> (usually with an ID like #nav or #navigation) then a few list items (<li>) inside of it, each with its own <a> tag inside it that links to other pages.

This HTML structure is perfectly correct, but the CSS selector is really what I’m worried about. First things first: There’s no reason for the ul before #navigation as an ID is already the most specific selector. Also, you don’t have to put li in the selector syntax because all the a elements inside the navigation are inside list items, so there’s no reason for that bit of specificity.

Thus, you can condense that selector as:

#navigation a { ... } 

This is an overly simplistic example because you might have nested list items that you want to style differently (i.e. #navigation li a is different from #navigation li ul li a); but if you don’t, then there’s no need for the excessive specificity.

I also want to talk about the need for an ID in this situation. Let’s assume for a minute that this navigation list is inside a header div (#header). Let us also assume that you will have no other unordered list in the header besides the navigation list.

If that is the case, we can even remove the ID from the unordered list in our HTML markup, and then we can select it in CSS as such:

#header ul a { ... } 

Here’s what I want you to take away from this example: Always write your CSS selectors with the very minimum level of specificity necessary for it to work. Including all that extra fluff may make it look more safe and precise, but when it comes to CSS selectors, there are only two levels of specificity: specific, and not specific enough.

3. Not Using Shorthand Properties

Take a look at the following property list:

#selector { margin-top: 50px; margin-right: 0; margin-bottom: 50px; margin-left 0; }

What is wrong with this picture? I hope that alarm bells are ringing in your head as you notice how much we’re repeating ourselves. Fortunately, there is a solution, and it’s using CSS shorthand properties.

The following has the same effect as the above style declaration, but we’ve reduced our code by three lines.

#selector { margin: 50px 0; }

Check out this list of properties that deals with font styles:

font-family: Helvetica; font-size: 14px; font-weight: bold; line-height: 1.5;

We can condense all that into one line:

font: bold 14px/1.5 Helvetica; 

We can also do this for background properties. The following:

background-image: url(background.png); background-repeat: repeat-y; background-position: center top;

Can be written in shorthand CSS as such:

background: url(background.png) repeat-y center top; 

4. Using 0px instead of 0

Say you want to add a 20px margin to the bottom of an element. You might use something like this:

#selector { margin: 20px 0px 20px 0px; } 

Don’t. This is excessive.

There’s no need to include the px after 0. While this may seem like I’m nitpicking and that it may not seem like much, when you’re working with a huge file, removing all those superfluous px can reduce the size of your file (which is never a bad thing).

5. Using Color Names Instead of Hexadecimal

Declaring red for color values is the lazy man’s #FF0000. By saying:

color: red;

You’re essentially saying that the browser should display what it thinks red is. If you’ve learned anything from making stuff function correctly in all browsers — and the hours of frustration you’ve accumulated because of a stupid list-bullet misalignment that can only be seen in IE7 — it’s that you should never let the browser decide how to display your web pages.

Instead, you should go to the effort to find the actual hex value for the color you’re trying to use. That way, you can make sure it’s the same color displayed across all browsers. You can use a color cheatsheet that provides a preview and the hex value of a color.

This may seem trivial, but when it comes to CSS, it’s the tiny things that often lead to the big gotchas.

6. Redundant Selectors

My process for writing styles is to start with all the typography, and then work on the structure, and finally on styling all the colors and backgrounds. That’s what works for me. Since I don’t focus on just one element at a time, I commonly find myself accidentally typing out a redundant style declaration.

I always do a final check after I’m done so that I can make sure that I haven’t repeated any selectors; and if I have, I’ll merge them. This sort of mistake is fine to make while you’re developing, but just try to make sure they don’t make it into production.

7. Redundant Properties

Similar to the one above, I often find myself having to apply the same properties to multiple selectors. This could be styling an <h5> in the header to look exactly like the <h6> in the footer, making the <pre>‘s and <blockquote>‘s the same size, or any number of things in between. In the final review of my CSS, I will look to make sure that I haven’t repeated too many properties.

For example, if I see two selectors doing the same thing, such as this:

#selector-1 { font-style: italic; color: #e7e7e7; margin: 5px; padding: 20px } .selector-2 { font-style: italic; color: #e7e7e7; margin: 5px; padding: 20px }

I will combine them, with the selectors separated by a comma (,):

#selector-1, .selector-2 { font-style: italic; color: #e7e7e7; margin: 5px; padding: 20px }

I hope you’re seeing the trend here: Try to be as terse and as efficient as possible. It pays dividends in maintenance time and page-load speed.

8. Not Providing Fallback Fonts

In a perfect world, every computer would always have every font you would ever want to use installed. Unfortunately, we don’t live in a perfect world. @font-face aside, web designers are pretty much limited to the few so called web-safe fonts (e.g.

Arial, Georgia, serif, etc.). There is a plus side, though. You can still use fonts like Helvetica that aren’t necessarily installed on every computer.

The secret lies in font stacks. Font stacks are a way for developers to provide fallback fonts for the browser to display if the user doesn’t have the preferred font installed. For example:

#selector { font-family: Helvetica; }

Can be expanded with fallback fonts as such:

#selector { font-family: Helvetica, Arial, sans-serif; }

Now, if the user doesn’t have Helvetica, they can see your site in Arial, and if that doesn’t work, it’ll just default to any sans-serif font installed.

By defining fallback fonts, you gain more control as to how your web pages are rendered.

9. Unnecessary Whitespace

When it comes to trying to reduce your CSS file sizes for performance, every space counts. When you’re developing, it’s OK to format your code in the way that you’re comfortable with. However, there is absolutely no reason not to take out excess characters (a process known as minification) when you actually push your project onto the web where the size of your files really counts.

Too many developers simply don’t minify their files before launching their websites, and I think that’s a huge mistake. Although it may not feel like it makes much of a difference, when you have huge CSS files

10. Not Organizing Your CSS in a Logical Way

When you’re writing CSS, do yourself a favor and organize your code. Through comments, you can insure that the next time you come to make a change to a file you’ll still be able to navigate it. 

I personally like to organize my styles by how the HTML that I’m styling is structured. This means that I have comments that distinguish the header, body, sidebar, and footer. A common CSS-authoring mistake I see is people just writing up their styles as soon as they think of them.

The next time you try to change something and can’t find the style declaration, you’ll be silently cursing yourself for not organizing your CSS well enough.

11. Using Only One Stylesheet for Everything

This one’s subjective, so bear with me while I give you my perspective. I am of the belief, as are others, that it is better to split stylesheets into a few different ones for big sites for easier maintenance and for better modularity. Maybe I’ll have one for a CSS reset, one for IE-specific fixes, and so on.

By organizing CSS into disparate stylesheets, I’ll know immediately where to find a style I want to change. You can do this by importing all the stylesheets into a stylesheet like so:

@import url("reset.css"); @import url("ie.css"); @import url("typography.css"); @import url("layout.css"); 

Let me stress, however, that this is what works for me and many other developers. You may prefer to squeeze them all in one file, and that’s okay; there’s nothing wrong with that.

But if you’re having a hard time maintaining a single file, try splitting your CSS up.

12. Not Providing a Print Stylesheet

In order to style your site on pages that will be printed, all you have to do is utilize and include a print stylesheet. It’s as easy as:

<link rel="stylesheet" href="print.css" media="print" /> 

Using a stylesheet for print allows you to hide elements you don’t want printed (such as your navigation menu), reset the background color to white, provide alternative typography for paragraphs so that it’s better suited on a piece of paper, and so forth. The important thing is that you think about how your page will look when printed.

Too many people just don’t think about it, so their sites will simply print the same way you see them on the screen.


I Made These 2 BEGINNER CSS Mistakes

No matter how long you've been writing code, it's always a good time to revisit the basics. While working on a project the other day, I made 2 beginner mistakes with the CSS I was writing. I misunderstood both CSS specificity and how transform:scale affects the DOM!

Stack Overflow about transform:scale - https://stackoverflow.com/questions/32835144/css-transform-scale-does-not-change-dom-size 
CSS Specificity - https://www.w3schools.com/css/css_specificity.asp 

#css