Questions tagged [logic]
The logic tag has no usage guidance.
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How do you record and track your business logic for software projects?
In my work, which is a UK university, we currently have no specific way of recording and tracking business logic and rules as they arise from stakeholders for our in-house software projects.
We use ...
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1
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Storing Sort Order in Database: match the business logic or the application logic? [closed]
Take a profile page for a job applicant with a list of names in a form with typical CRUD:
Resume Name:
Altenrate Name 1:
Alternate Name 2:
Alternate Name 3:
Assuming we have some sort of Names table ...
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Is there a name for this kind of state machine?
I'm thinking of a GUI architecture that works like a finite-state machine where there is a set of possible states and a set of possible inputs--or events.
The thing is, some states transition to the ...
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Is it possible to store N bits of unique combinations, in N-1 bits? If not; why does MD5 get reprimanded for collissions?
Regarding cryptography and the issue of collisions, I posed a question as to whether it was ever possible to store every single possible combination of a bit array of a particular size, in a bit array ...
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Best way to integrate google signin in existing user registration system with PHP/MYSQL [Logic]
I want to integrate google signin, in our existing user registration system. But not sure which approach will be good in terms of data security + user experience (UX) + speed. Even if its a good idea ...
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How does the classic proof for the halting problem work?
I've looked up a lot proofs for the halting problem (that are basic enough that I can understand what they are trying say ^^) but for all of them I don't get their last step right before they pull the ...
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Nassi Shneiderman diagram: Which player has its turn?
I am trying to program a little game and for that I need to determine which's players turn. I am solving it firstly with a Nassi-Schneiderman diagram with a variable turn whic can be 1 or 2, but my ...
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Logic App next number
I have a need to generate a next number for each file type my Logic Apps is generating. My Logic App is doing some translations between an WMS and a customer's ERP. The issue is the customer is ...
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Understanding LSB and MSB
In reference to one interface control document, I found difficulty in understanding this concept. There is one parameter having LSB of 0.0625 and MSB of 2048 that should be transmitted from one piece ...
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Why are next-state function and output functions of an FSM combinational functions?
From my understanding, combinational logic is dependent solely on input, and sequential logic involves state--memory.
When explaining a finite state machine (FSM), however, it is said that an FSM ...
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Divergent Bodies of Truth, Relationships of Concepts
A recent endeavor of mine requires asking users how related two concepts are. Example: Kiwi and Fruit. Identical? Fairly Similar? Rather different? Unrelated?
It occurs to me that for certain ...
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Algorithm to identify differences between two sorted data sets
PROBLEM STATEMENT: Print the items that differ between the following two left and right sorted data sets:
A A
B C
C D
D E
G F
H EOF
EOF
The proposed solution ...
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Eliminate areas of binary space and increment through result efficiently
The goal is to take a binary space, say 64 bits, and make certain parts of it "valid" and certain parts "invalid", then increment, starting at 0, through that space, avoiding the invalid areas.
Space ...
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For which built-in C++ type is the law of excluded middle violated?
Apparently, for some built-in type of C++, the following does not hold: a==b || a!=b
Which type/value is it?
The question is originally from
this video:
https://www.youtube.com/watch?v=etZgaSjzqlU&...
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load more and Search Logic
Firstly i hope im in the right place to ask this question.
I am building a web page that allows the user to select one image from a set of a 100+. i want to display them 6 at a time and the user ...
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Confusion about strengthening/weakening preconditions/postconditions
I've recently become incredibly confused about the notion of "strengthening/weakening a precondition/postcondition". I think my confusion lies in my interpretation of the words "precondition" and "...
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Generation of logic tables from if conditions
Suppose I have a large, multi-line case statement, which checks several variables before returning a final value.
case
when (foo='bar' OR foo='foo') AND (bar='foo') then 200
when (foo='jar') AND (...
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How to run 2-layer perceptron to solve XOR
XOR is not solvable by using a single perceptron with standard scalar product and unit step function.
This article suggests using 3 perceptron to make a network:
http://toritris.weebly.com/perceptron-...
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150
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Combine if blocks with repetitive code
I have this piece of code
if (!expr1) {
codeblock1;
} elseif (expr2) {
codeblock2;
codeblock1;
}
It is pissing the hell out of me because I am trying to refactor it in such a way that ...
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Separate context-dependent information from the core logic code
Say, I have a code file where all the core logic is located. In addition, I have some custom logic that is defined by some flags, like
if (a && b && c) {}
if (!e && f) {}
...
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sql - How do I add child of child when dependent on parent
I'm building a wpf application which interacts with a sql database.
I'm confused about adding children of children in my window.
For example.. I just created a fishing trip so my fishing trip doesnt ...
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Storing Business Logic in Tables rather than Stored Procedure or Application
The requirement is that once the product has been delivered, user can update the logic as he wants.
An example of logic I have is follows-
An institute teaches English has following requirements -
...
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From a set of rules, derive the implications? [closed]
I've only just become interested in this domain, so sorry if I'm not using the correct terminologies.
What I want is the following: Say I have a set of rules (or constraints), I want to derive some ...
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Possibility of retrieving X value after Bitwise OR operator
Z = X ∨ Y
(where X, Y, Z are 96bits binary numbers)
If I have "Z" value and "Y" value. Are there any possibilities to retrieve "X" value from "Z"?
What I know ...
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431
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in trouble making a card game with pygame
I am designing a card game playable against the computer.
The rule is very simple
Both player and CPU gets 10 cards of 1 to 10.
Player and CPU plays a single card at the same time, every round.
The ...
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How can I Identify which condition satisfied the if statement? [closed]
Suppose, I am using a if statement as such:
if(A || B || C || D)
{
echo "Hurrah! if is satisfied!";
echo "But! How can I know which was true of the 4 (A,B,C,D)";
}
Is there any way I can ...
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Creating algorithms [closed]
I am a relatively new programmer. I can pick up languages and learn syntax at a speed that I consider good, but I can't figure out how to solve problems logically using algorithms very well. I know ...
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What algorithm can be used to determine order given incomplete information?
Given a series of statements such as:
a<c
a<b
b<c
(Read as "a is before b", "a is before c", etc.)
What is the order of the elements? In this example, the answer is a<b<c.
A less ...
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Is it common practice to transform requirement specifications into predicate logic for functional programming?
I've recently been assigned to work on a small project which is being implemented in Haskell. Coming from an OO/imperative background, I'm used to converting requirements/user-stories into use-cases ...
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Logic behind an 'undo' for painting on a canvas
I'm working on a module that allows users a basic paint function. I want to support undoing any modifications done to the painting surface. Assuming that we have one layer (for the sake of simplicity),...
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Logic to find the number of requests which can be open at any point of time
I am trying to build an application which tries to find out if a system is suffering from backlog (# of requests which are open are more than what the team can handle)
I have the below parameters ...
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Data model for persisting queries to database
I have been asked to build what is essentially a query builder for a reporting application.
The variety of objects to query, potential modifiers, number of conditions, and so forth to be reported on ...
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Why is polling accepted in web programming?
I am currently working on a Ruby on Rails project which shows a list of images.
A must-have for this project is that it shows new posts in realtime without the need of refreshing the web page. After ...
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Understanding bitmap logic
I was going though this blog and it says
You can represent a list of distinct integers no larger than N using exactly N bits: if the integer i appears in your list, you set the i th bit to true. ...
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In retrospect, has it been a good idea to use three-valued logic for SQL NULL comparisons?
In SQL, NULL means "unknown value". Thus, every comparison with NULL yields NULL (unknown) rather than TRUE or FALSE.
From a conceptional point of view, this three-valued logic makes sense. From a ...
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Is "code that generates code" really all that great?
I was looking through CodePen's "popular pens" and I noticed this cool little spiral animation somebody made with a seemingly ridiculously small amount of code.
This is quite impressive until you ...
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Calculating WPM given a variable stream of input
I'm creating an application that sits in the background and records all key presses (currently this is done and working; an event is fired every keydown/keyup). I want to offer a feature for the user ...
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C# Logic - gaps & Islands
I am looking for help designing the display of available times for appointments (for example a hairdresser's appointment book).
Currently I have a query that returns a collection of periods that are ...
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Logic design question for SQL query
Was wondering if you could help me on a SQL problem I’m having.
I have a set of records of events where each event has a start time and end time. No event has the same start time, and the end time ...
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Finding possible positions for rectangle in a 2-d array
Well, the title is not very appropriate, please read on (I couldn't get a better one).
Note: Using Python 2.7, but an algorithm will help too.
I'm making a side scroller game, in which I am ...
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How to remove data redundancy in a table? [closed]
F1 F2 F3 C1 C2 C3
------------------------------------------------
A B C 1
D E F 2
A B C 3
D E F 4
A B C 5
D E F 6
...
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Tests for emptiness vs tests for nothingness
Is there any consensus between languages how tests for emptiness are distinct from tests for noneness? In python the following expression is false:
{} is {}
However this expression evaluates to True
...
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How to unit test method that returns a collection while avoiding logic in the test
I am test-driving a method that is to generate a collection of data objects. I want to verify that the properties of the objects are being set correctly. Some of the properties will be set to the same ...
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In which order should I do comparisons? [duplicate]
I'm a strong proponent of writing if statements like this:
variable == constant
Because to me it just makes sense, it is more readable than the inverted:
constant == variable
Which seems to be ...
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How Do Computers Process Conditional/Input/ Event Based Code? [duplicate]
I understand that computers are basically a complex system of electrical signatures that can calculate based on logic boards, and some sort of gate mechanism, but how do computers process something ...
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Matching up articles with similar ones
I am creating a site where people can write on a niche topic. It is almost like a blog, however the area as I mentioned is a small niche with (hopefully) passionate users.
I want a functionality ...
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Mobile number validation
I am trying to find best way to validate a mobile number with in a country.
Currently my understanding is: User can enter whatever format they want in mobile numbers and its a waste of time and ...
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Identifier for the “completed” stage of a process: 0, 99, something else? [closed]
Say, that you are handling a multi-step process (like a complex registration form, with a number of steps the user has go through in order). You need to be able to save the current state of the ...
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Why is there both a short-circuit OR as well as unshort-circuited variation of that operator in C#?
Periodically, I wonder about this:
The short-circuit OR would always return the same value that the unshort-circuited OR operator would?
I expect that the short-circuit OR would always evaluate ...
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Techniques to increase logic at programming [closed]
I am into programming since last 3 years. But I seems to be lost in it. I am not able to get good at it even though I code everyday.
suppose I solve one problem, I will wander from solution to ...
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