Questions tagged [conditions]

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How to structure many complex conditionals on a class

I have a class (as a protobuf) OrderChange, that represents when an order (imagine Amazon.com) changes: message OrderChange { Order old_order = 1; Order new_order = 2; } message Order { ...
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  • 159
2 votes
1 answer
328 views

Multiple if condition optimization

Often I find conditional statements such as: if (life_max < max): if (expand): do life_max = max else: if (life_max > max) and not (expand): do life_max = max; Although readable, ...
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3 votes
4 answers
319 views

Is the strategy pattern for 3 variants overuse?

I am curious about it because I talked with a friend about the strategy pattern, and we diverge about when we have to use it. Our scenario is that I have to build a view component with 3 variants. All ...
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2 votes
1 answer
243 views

What is the name of this pattern / style?

We have a "workflow orchestration" system at work. It works something like this: You configure what to run (in a database table), such as: NameOfStepATHingToRun ="weather_data" ...
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3 votes
0 answers
98 views

Refactoring nested if-else statement [duplicate]

I have an app where every object is checked based on various types of business rules. For this, i used multiple nested if-else statement which was done in one class. I am not happy with this situation ...
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1 vote
1 answer
629 views

Why does a condition variable's wait() release the associated mutex before blocking and reacquire it before returning?

Stallings' Operating System book says about condition variable in Solaris, A condition variable is used to wait until a particular condition is true. Condition variables must be used in ...
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-2 votes
1 answer
274 views

Refactoring nested if-else interface method in Java8

I have the below default method in an interface and it seems to be pretty complex because of the many if-else conditions. default void validate() { Application application = application().get(); ...
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-2 votes
1 answer
257 views

Conditional command pattern

I have an abstraction that defines something like a command pattern, interface Participant { void proceed(); } Participants are grouped in a collection and are called all together. But each ...
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  • 141
4 votes
5 answers
222 views

Dealing with unwanted usages of a function

I am writing a function that I would not like to get called given a certain context and am wondering how best to convey that to possible users of the function. Assume, for exemplification, I am ...
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1 vote
3 answers
209 views

Is there an elegant way to structure consecutive short-circuited assignments?

The following code works and is clear, but it's also verbose. I suspect that there's a way to make it more terse, so that it could be skimmed quickly and it'd be more obvious what's happening. // The ...
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  • 123
2 votes
5 answers
385 views

When to extract boolean conditions into their own function?

I commonly use a boolean condition/variable when it's something too big or complicated and takes too much space by itself inside ifs - basically to avoid repeatability and thus improve readability. E....
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3 votes
1 answer
124 views

Is there a pattern for choosing one of a set of options at random when their selection criteria are equal?

I want to choose between several options, and if the criteria I'm using for selection happen to be equal, I want one at random (reasonably so, so it's equal-chance each time, rather than arbitrary). ...
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  • 149
-2 votes
2 answers
289 views

Conditional jump statements in middle- and high-level languages

In Java, C, and C++ we have the following jump statements: break, continue, goto, and return. In C#, there is also throw. I'm not really familiar with either of these languages. This is simply what I ...
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8 votes
5 answers
829 views

Is it bad practice to add "false or" or "true and" to conditionals?

Is it bad practice to add false or ... or true and ... for the sake of promoting code genericness and/or ease of use? As in: SELECT * FROM table WHERE TRUE AND IsEnabled AND SomeField = some_value ...
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3 votes
2 answers
193 views

Does removing unused features from libraries through compiler flags increase or reduce security risks?

Software libraries targetting resource constrained environments like embedded systems use conditional compilation to allow consumers to shave space and thus increase performance by removing unused ...
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  • 435
7 votes
2 answers
316 views

How does conditional compilation impact product quality, security and code complexity? [closed]

Software libraries targetting resource constrained environments like embedded systems use conditional compilation to allow consumers to shave space by removing unused features from the final binaries ...
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  • 435
0 votes
1 answer
55 views

Analyse/show user why data has been filtered out by SQL

Sorry for the bad title. Couldn't really think of a good name without an explanation. In our system (source is inside Oracle PL/SQL packages) we have quite a lot large SQL queries with a sh..load of ...
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  • 133
1 vote
1 answer
80 views

Using define in a conditional expression in Scheme

In Scheme, the general form of a procedure definition is: (define (<name> <parameters>) <body>) where <body> accepts a sequence of expressions, allowing this kind of procedure ...
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10 votes
5 answers
607 views

If-else ladder that is supposed to catch all conditions - should a redundant final clause be added?

This is a thing I'm doing a lot lately. Example: setCircle(circle, i, { current }) { if (i == current) { circle.src = 'images/25CE.svg' circle.alt = 'Now picking' } else if (...
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2 votes
4 answers
414 views

Conditional vs Logical Testing

I would like to get your code thought and views on using conditional vs logical testing. For example: To test the conditions of truthness of all of the following variables, their currect status is ...
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2 votes
2 answers
280 views

API Race conditions

I have an API in which we expect a emailID and a certain deal data. The case is we want to keep the dealId and contactId(email) to be unique. Creating a deal requires data insertion in multiple ...
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1 vote
2 answers
522 views

Avoid if-else block in favor of default assignment followed by if

A colleague, and frankly better software engineer that me, is telling me that this pattern let variable = someDefaultVariable(); if (some_boolean) { variable = someOtherValue(); } is better than ...
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2 votes
3 answers
836 views

Reconciling MVC with a strategy pattern

I am working on a Rails application which employs a classic MVC as its fundamental structure. In that structure the controller is supposed to be responsible for "which view to render when". Now after ...
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2 votes
2 answers
159 views

Should special case be inside or outside the for loop here?

For example, suppose I have 2 arrays: let arr1=[5,2,1]; let arr2=["abcde","ab","a"]; my work is simple : to check if length of strings in arr2 are larger than corresponding element with same index ...
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  • 5,572
3 votes
4 answers
5k views

What is the most concise way to test a boolean condition with many AND clauses?

I have a function which returns the availability of a module, where the module is only available if multiple conditions are all met. The code looks like this: bool isShipAvailable() { bool ...
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0 votes
3 answers
127 views

Approaches for not complex conditions

I encountered code like this below. I was told its fine, and boilerplate is not always better. I agree boilerplate might be bad, but I am not sure about something like this: if (entity....
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-1 votes
1 answer
163 views

Enforcing IF, ELSEIF and ELSE on collection of ojects

I am designing a project where I have to enforce IF, ELSEIF and ELSE conditions on collection of objects. For example: public class Box { private List<Item> items; } I want to define IF ...
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1 vote
1 answer
903 views

How to compute cyclomatic complexity for empty whiles and if + breaks?

This is closely related to this question which asks about the complexity of the following: while (x > level) x = x – 1; x = 0 Using the graph method it has a Complexity = 2. Fred Swartz ...
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  • 424
5 votes
6 answers
9k views

Best approach - convert multiple conditional if -else in a more handy design

I have a class that handles the state of a response, called StockResponse. The code has multiple ifs to handle each state of the stock. Most of the cases has a default behaviour, but some conditions ...
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  • 592
4 votes
3 answers
1k views

Best practice to avoid partial branches

I do a lot of coding in python and got a lot of if conditions without an else statement so to say partial branches. E.g.: # if a certain kwarg was passed to a function call if kwargs.get('a_option'):...
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  • 149
0 votes
3 answers
1k views

Which is more readable: early returns, or conditionals? [duplicate]

I’m writing an asynchronous, Promise-returning function. In the processing I test some conditions, and if the conditions pass, the promise should be fulfilled (resolved), but if one fails, then the ...
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  • 264
0 votes
1 answer
93 views

Multi-dimensional if-elseif-else block to call different functions

I have a function a plugin that is called whenever the WebAPI's "Plugin" endpoint is called in the main project, and that has to process the HTTP request. The request holds more information about what ...
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45 votes
13 answers
17k views

How do I edit a chain of if-else if statements to adhere to Uncle Bob's Clean Code principles?

I'm trying to follow Uncle Bob's clean code suggestions and specifically to keep methods short. I find myself unable to shorten this logic though: if (checkCondition()) {addAlert(1);} else if (...
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  • 547
3 votes
2 answers
13k views

PHP : Better way to print html in if-else conditions

Please refer the following two forms of the same code First: <?php if(some_condition){ ?> <li><a target="_blank" href="example.com/channel1/" class="xyz">If content</a>&...
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181 votes
15 answers
66k views

Developer insists if statements shouldn't have negated conditions, and should always have an else block

I have an acquaintance, a more seasoned developer than me. We were talking about programming practices and I was taken aback by his approach on 'if' statements. He insists on some practices regarding ...
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2 votes
2 answers
2k views

Long chained method calls contained within an if statement shown on a sequence diagram

Just wondering if there is a good way to do this? Currently i'm performing the method calls as if they were happening prior to the conditional block, then comparing what would be the result in "[...
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1 vote
1 answer
106 views

How do I implement a run-only-once method when all criteria are met for the first time run it?

I need a run-only-once method that when all the criteria are met, say A&B&C are true, run the codes once, but only once. So if later on all the criteria are met again (A&B&C are true ...
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4 votes
2 answers
3k views

Store conditional expression in database

We have an application that allows users to enter conditionals in the form bound op x op bound2, we store this as a string, and then parse it at runtime to evaluate it. It is a decent amount of work, ...
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  • 293
20 votes
7 answers
2k views

Should "else" be used in situations where control flow renders it redundant?

I sometimes stumble upon code similar to the following example (what this function does exactly is out of the scope of this question): function doSomething(value) { if (check1(value)) { return -...
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  • 357
3 votes
3 answers
620 views

Does if-else optimization in PHP have any effect?

Consider a scenario, where A occurs frequently like 4 out 5 times, and B only in rare cases, we can write our conditional statement in two ways: if(A) //do something else // do something if B, only ...
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  • 245
8 votes
2 answers
8k views

Is it good practice to use array.pop() assignment in a while loop condition?

Just saw a code snippet that used an array pop assignment in the while condition; was wondering if this is acceptable/good practice? var arr = [0,1,2,3,4,5]; var current; while (current = arr.pop()) {...
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  • 93
-2 votes
3 answers
2k views

Nested if statements or multiple if statements [duplicate]

Which way is better? -- Option 1------------- if ( condition1 ) { statement1 } else { exit program } if ( condition2 ) { statement2 } else { exit program } ----...
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1 vote
5 answers
599 views

How to optimize performance of sequential condition checks in Java?

I am writing a program that looks for a solution of a diophantine equation. The program is cycling for (int d = 0; d <= max; d++) { for (int c = 0; c < d; c++) { boolean ...
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0 votes
1 answer
180 views

The Same Behavior for Boolean and Exception

The following code uses a boolean preference active: In the active state, it does an operation which could throw an exception. On this exception, it does fall back to the non-active state. let active ...
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  • 137
1 vote
1 answer
94 views

jQuery, deferrers and "if" conditionals

How could I simplify the following code? I suspect that it can be simplified by using the $.Deferred class, but I don't know how. if (condition) { $.get('url').done(function () { done(); ...
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  • 213
4 votes
4 answers
2k views

Defining logic without nested if-else statements

I'm working on a somewhat simple game. Currently trying to implement the game logic for moving the pieces around. Logic is something like this: does player have pieces in inventory? if yes: ...
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  • 149
2 votes
1 answer
275 views

Dealing with conditional verification logic using guard assertion

I have parametrized test with 2 variants: NULL value and any NOT NULL value From this value is depends one assert: In case NULL it should be checked if object has field1 with value1 In case ...
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  • 141
0 votes
1 answer
1k views

How to structure huge conditional statement?

I'm creating some kind of a "personal assistant" application which is basically a web service that receives a message and then does something according to it. For example I send "what time is it?" ...
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  • 193
2 votes
2 answers
4k views

Why are the Coffman conditions necessary for a deadlock to occur?

Quoting https://en.wikipedia.org/wiki/Deadlock#Necessary_conditions : A deadlock situation can arise if all of the following conditions hold simultaneously in a system: Mutual exclusion: at least ...
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  • 3,307
1 vote
1 answer
96 views

Rewriting conditionals in OOP without generics

Let's say I have a set of objects, foo f; bar br; baz bz; I also have a string of JSON data, string JSONstring; Depending on the object type of the JSON string, I need to transform it into ...
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