Questions tagged [conditions]
The conditions tag has no usage guidance.
121
questions
2
votes
1answer
241 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"
...
3
votes
0answers
93 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 ...
0
votes
1answer
230 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 ...
-2
votes
1answer
102 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();
...
-2
votes
1answer
100 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 ...
3
votes
5answers
217 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 ...
0
votes
3answers
199 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 ...
1
vote
5answers
225 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....
3
votes
1answer
121 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). ...
-2
votes
2answers
239 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 ...
8
votes
3answers
691 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
...
3
votes
2answers
171 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 ...
7
votes
2answers
209 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 ...
0
votes
1answer
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 ...
1
vote
1answer
70 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 ...
10
votes
5answers
545 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 (...
2
votes
4answers
385 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 ...
2
votes
2answers
221 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 ...
1
vote
2answers
360 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 ...
2
votes
3answers
596 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 ...
2
votes
2answers
154 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 ...
3
votes
4answers
4k 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 ...
0
votes
3answers
123 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....
-1
votes
1answer
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 ...
1
vote
1answer
669 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 ...
5
votes
6answers
7k 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 ...
3
votes
3answers
655 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'):...
0
votes
3answers
730 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 ...
0
votes
1answer
92 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 ...
45
votes
13answers
15k 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 (...
3
votes
2answers
12k 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>&...
176
votes
15answers
60k 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 ...
2
votes
2answers
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 "[...
1
vote
1answer
99 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 ...
3
votes
2answers
2k 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, ...
20
votes
7answers
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 -...
3
votes
3answers
503 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 ...
8
votes
2answers
6k 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())
{...
-2
votes
3answers
1k 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
}
----...
1
vote
5answers
479 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 ...
0
votes
1answer
170 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 ...
1
vote
1answer
93 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();
...
4
votes
4answers
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:
...
2
votes
1answer
218 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 ...
0
votes
1answer
927 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?" ...
2
votes
2answers
3k 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 ...
1
vote
1answer
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 ...
12
votes
3answers
530 views
Is it better to guard the method call or the method itself?
I am writing an application and I got to this point:
private void SomeMethod()
{
if (Settings.GiveApples)
{
GiveApples();
}
if (Settings.GiveBananas)
{
...
1
vote
3answers
178 views
Enforcing order for two consecutive statements
I have the following code:
subroutine foo(int index)
{
// Check A.
// Critical: Check A must precede Check B below.
if (index == 1)
{
return true;
}
// Check B.
...
3
votes
4answers
8k views
How to properly reverse the if statement when you have two conditions in it?
In PHP I have this if statement ( $first and $second will evaluate to true or false):
if ($first && $second) {
// evereything is OK
} else {
throw new Exception()...
}
My real code ...
