Merge branch 'master' of https://github.com/florinpop17/app-ideas
Florin Pop
6 years ago
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# Bin2Dec
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Binary is the number system all digital computers are based on.
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Therefore it's important for developers to understand binary, or base 2,
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mathematics. The purpose of Bin2Dec is to provide practice and
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understanding of how binary calculations.
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Bin2Dec allows the user to enter strings of up to 8 binary digits, 0's
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and 1's, in any sequence and then displays its decimal equivalent.
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This challenge requires that the developer implementing it follow these
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constraints:
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- Arrays may not be used contain the binary digits entered by the user
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- Determining the decimal equivalent of a particular binary digit in the
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sequence must be calculated using a single mathematical function, for
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example the natural logarithm. It's up to you to figure out which function
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to use.
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## User Stories
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- [ ] User can enter up to 8 binary digits in one input field
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- [ ] User must be notified if anything other than a 0 or 1 was entered.
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- [ ] User views the results in a single output field containing the
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decimal (base 10) equivalent of the the binary number that was entered
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## Bonus features
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- [ ] User can enter a variable number of binary digits
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## Useful links and resources
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[Binary number system](https://en.wikipedia.org/wiki/Binary_number)
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## Example projects
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Try not to view this until you've developed your own solution:
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- [Binary to decimal conversion program for beginners](https://www.youtube.com/watch?v=YMIALQE26KQ)
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# ColorCycle
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The use of color plays a major role in an applications User Interface and
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User Experience (UI/UX). ColorCycle seeks to help WebDev's better understand
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RBG colors by making small changes to a colored box over time.
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This app draws a box filled with a user specified color and makes small changes
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over time also based on user input. In otherwords, from cycles through
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changes to the originally specified color. These changes allow the user to
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experience the visual impact different changes to the individual parts of
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an RGB color specification (e.g. `#000000` color code).
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## User Stories
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- [ ] User can specify a starting fill color as a six hexadecimal standard
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CSS color code in three individual components of two digits each - red,
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blue, and green.
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- [ ] User can specify an increment value for each color component that will
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be added to that component every .25 second.
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- [ ] User can see the box containing the fill color change every .25 seconds.
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- [ ] User can only change the color components and their increments when
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the app is stopped.
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- [ ] User can start and stop the fill operation using a button whose name
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changes to 'Start' when stopped and 'Stop' when started.
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- [ ] User will recieve an warning if something other than hexadecimal digits
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are entered for the color components.
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## Bonus features
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- [ ] User can change the time interval between color changes.
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- [ ] User can specify the color encoding format used from RGB to another
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format like HSL.
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## Useful links and resources
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[CSS Color Codes](https://www.quackit.com/css/css_color_codes.cfm)
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## Example projects
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[CSS Color Changing Background](https://codepen.io/SoumyajitChand/pen/wjKVed)
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# FlipImage
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It's important for Web Developers to understand the basics of manipulating
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images since rich web applications rely on images to add value to the user
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interface and user experience (UI/UX).
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FlipImage explores one aspect of image manipulation - image rotation. This
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app displays a square pane containing a single image presented in a 2x2
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matrix. Using a set of up, down, left, and right arrows adjacent to each
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of the images the user may flip them vertically or horizontally.
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You must only use native HTML, CSS, and Javascript to implement this app.
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Image packages and libraries are not allowed.
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## User Stories
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- [ ] User can see a pane containing a single image repeated in a 2x2 matrix.
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- [ ] User can flip any one of the images vertically or horizontally using
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a set of up, down, left, and right arrows next to the image.
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## Bonus features
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- [ ] User can change the default image by entering the URL of a different
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image in an input field.
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- [ ] User can display the new image by clicking a 'Display' button next to
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the input field
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- [ ] User can see an error message if the new images URL is not found
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## Useful links and resources
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- [How to Flip an Image](https://www.w3schools.com/howto/howto_css_flip_image.asp)
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- [Create a CSS Flipping Animatin](https://davidwalsh.name/css-flip)
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## Example projects
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[Image Effects by @bennettfeely](https://codepen.io/seyedi/pen/gvqYQv)
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# TrueOrFalse
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Something every developer needs to clearly understand is the result of
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conditional expressions like `x === y`. This is a bit more involved for
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Javascript developers who must also understand the concept of _truthiness_.
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TrueOrFalse helps by displaying the result when a conditional operator is
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applied to two values. Users can use this to test their knowledge and
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explore edge cases.
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The two values and the conditional operator are entered by the user and the
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result to be displayed will be TRUE or FALSE. The implemenation must not use
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the `eval()` function to generate the result of the conditional.
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## User Stories
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- [ ] User can enter two strings to be compared
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- [ ] User can enter a valid Javascript conditional operator to be used
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to compare the two strings
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- [ ] User can see the result of the conditional as TRUE or FALSE
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- [ ] User can see a warning if the input strings or conditional operator
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that has been entered is not valid.
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## Bonus features
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- [ ] User can specify the type of each of the two strings so numbers can
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be compared to strings, strings to booleans, etc.
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## Useful links and resources
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- [Comparison Operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators)
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- [Conditional Javascript for Experts](https://hackernoon.com/conditional-javascript-for-experts-d2aa456ef67c)
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- [Truthy and Falsy: When all is not equal in Javascript](https://www.sitepoint.com/javascript-truthy-falsy/)
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## Example projects
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N/a
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