I am trying to get a better grasp of delegates and I am trying to create a dollar sign field that begins with the text $0.00, and then fills in the dollar figure as digits are added. For example, typing 4-2-7-5 would produce $0.00, $0.04, $0.42, $4.27, $42.75.
I have created a UITextField and a delegate file for this behavior. I have no idea how to proceed and I am a complete noob in this concept. I found a thread that does explore this concept, but the thread is far more advanced and I don't understand the syntax being used. That question is at: Format a UITextField for currency
I really want to know how to make this happen, but more importantly WHY it works.
Related
I made a binary calculator with bitwise functions (bitand, bitor, bitxor, ect.) in google sheets (yes I am aware that there are built in functions to do this, this seemed more fun). It is an 8 bit calculator, and I currently have addition and subtraction implemented. Multiplication is planned, but seems way too hard at the moment
One of the things I came across is once a calculation is done, the user has to manually 0 out the addends/minuend and subtrahend one digit at a time. I would like to optimize this process.
I can easily create a script that will input 0 into all the cells and hook that up to a button. I have a feeling that's the route I'm going to have to go. But I want to challenge myself in making cool stuff, so I want the coolest solution.
My question is: is there a way I can do this without a script attached? I've been experimenting with ARRAYFORMULA and VLOOKUP, but I don't have a clear answer yet.
Expected behavior:
User inputs their calculation. User records the answer. User selects both 8 bit binary numbers (currently residing in A1:H2) and presses backspace. Google Sheet automatically translates those blank cells to 0's.
take a look into custom internal formatting. any text can be converted to "0"
then see shifted arrays:
={"", "x"}
formula from G9 will print "0" into H9. also, you can anytime enter value in H9 to "overwrite" the zero and after you don't need the entered value you just clear it with backspace or delete key and it will be filled with "0" again.
also, note that after you enter value in H9, G9 will error out and such error cant be suppressed so see hidden cells:
not sure if it's cool enough but it works (with compromises)
I am trying to read a text in a given rectangle using readText() function.
The function works correctly except when it has to read some text which has special characters like ' _ & etc.
I tried using validCharacters with readText() function. But it didn't help.
Code -
put ReadText((287,125,810,164),validCharacters:"_-'.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890") into Login
I tried working with character collections. But that doesn't seem to be right because the text trying to pick is a dynamic text combination of numbers alphabets and a special character. So one cannot create a library of character collection of every alphabet (a-z, A-Z), numbers(0-9) and special characters.
Example of text trying to read:
Login_Userid1_1, Login'Userid1_1
So how do I read such text correctly
Debugging OCR is a bit of an imprecise science. EggPlant has a lot of OCR Parameters to tweak. When designing test cases it's best to try use other mechanisms to gather information whenever possible. ReadText() should be considered a last resort when more reliable methods are unavailable. When I've used it I've often needed to do a lot of trial and error to find the right set of settings, and SearchRectangle to get consistent results. Without seeing exactly what images you are trying to read text from it's difficult to impossible to troubleshoot where the issue might be.
One thing that does stand out to me is that you're trying to read strings that may contain underscores. ReadText() has an optional property IgnoreUnderscores which treats underscores as spaces. By default this property is set to ON. It defaults to ON because some OCR engines have problems identifying underscore characters consistently.
If you want to have ReadText() handle underscores you'll want to explicitly set this property to OFF.
ReadText(rect, validCharacters:chars, ignoreUnderscores:OFF)
I'm working on an iOS app that involves user input, and I'd like to keep it kid-friendly. One of the main features of the app is that user inputted titles and phrases can be shown to everyone who uses the app.
When a user creates a new title I want to verify that it is safe-for-work. My initial thought was just to have a list of all profane words and verify that none of them exist in the title:
for bad_word in list_of_bad_words:
if bad_word in user_inputted_title:
// Complain to user!
// Title is okay.
I imagine that there must be libraries or best practices for doing this. People could easily substitute numbers for letters, and I'm sure there are sequences of SFW words that create inappropriate phrases.
Can anyone suggest a better way of doing this? Specifically, if there are any Swift tools that would be awesome!
There are some cocoapods for this:
https://github.com/IslandOfDoom/IODProfanityFilter
https://github.com/MaxKramer/SCRProfanityChecker
I haven't used either of these personally, but I hope these can be a good starting point. The first one replaces any profanity with asterisks, and the second can give you the range of the profanity so you can replace it with your own filler. Good luck.
I am using DDMathParser in my app, and have recently come across the need to get occurrences of any group of numbers within a () parentheses bracket thingy (very highly technical!). For example, I would need to get (6+5) out of 6+7/8(6+5). Specifically, I would like to be able to do this so that I can make (56+9)sqrt compile just as well as sqrt(56+9). Any help?
P.S. I know that the maker of DDMathParser is often sighted in this neck of the woods. I am secretly hoping that he will come to the rescue and either fix my problem so I can implement it myself or him make it part of DDMathParser! :)
So, I've thought a lot about this question since you posted it a month ago. From what I understand, you're constructing a string as the user clicks/taps buttons.
I think this is your problem.
As the user taps buttons, you should be constructing (or modifying) DDExpression objects. This is the "pure" format of a math expression, whereas a string is lossy and difficult to manipulate. The string you show to the user should be generated from the DDExpression tree you're building.
This is a complex problem, and I'm still not entirely sure how I would go about implementing this, but this is the root of how I'd do it. I would not just construct a string based on what the user types.
I am creating an application where I need to implement autocompletion when a user is typing into an text input, with the 10 nearest/highest ranking words appearing below the text field.
I've been given a fairly big list of around 80,000 words and their respective 'priority' - a number which determines how high up they appear in the autocomplete depending on the size of the number, like this:
"transport international";19205
"taxi";18462
"location de voitures";18160
"police";18126
"formation";17858
I am kinda new to iOS development and was wondering what is the best way to do this - should I split the 80,000 phrases into smaller files, or just keep it in one? What would be faster?
I have seen autocompletion used in an example for iOS but it was for a very small amount of suggestions - I haven't seen it done using a file this large before, and obviously I would like to make it as fast as possible for added user experience.
Any suggestions as to examples, tutorials or code suggestions would be greatly appreciated, thanks.
If you prefer something that does autocomplete but is a direct subclass of UITextField, then MLPAutoCompleteTextField may be of interest to you.
MLPAutoCompleteTextField works by simply asking its autocomplete datasource for an array of autocomplete suggestions each time the text in the textfield changes. It can even automatically sort words so that the ones closest to what the user is typing will appear at the top of the autocomplete list (using a Levenshtein Distance algorithm). Autocomplete suggestions can be simple strings, or objects that implement MLPAutoCompletionObject protocol.
Tip: For a large dataset of autocomplete terms, you'll probably want to break up your list based on starting letters. (Example: When the user enters the letter F, you give the autocomplete textfield only a list of words that start with F.)
MLPAutoCompleteTextField can efficiently sort several thousand suggestions in a reasonable amount of time, and will never block the UI while it sorts.
At the moment, weighted suggestions (that override the default sorting) aren't possible but it's a planned feature.
You may want to use this repo HTAutocompleteTextField, perfect solution.
https://github.com/TarasRoshko/TRAutocompleteView
Just conform TRAutocompleteItemsSource protocol and that's it. Protocol is designed with async support in mind. Demo app and sample TRGoogleMapsAutocompleteItemsSource should greatly help you with it.
This link worked well for me. Depending on your code, just don't miss the difference between UITextField and UITextView.
No extra libraries, just an easy custom UITableView and search function.