Newest logic Questions | Wyzant Ask An Expert

03/27/19

Can someone explain this JavaScript auto executing function?

var foo = (function(){ var x = 0; return function(){return x++;}; })() Why the var x = 0 expression only runs once is my biggest misunderstanding about this.

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Logic Javascript Unit Testing Jasmine

03/27/19

Jasmine expect logic (expect A OR B)?

I need to set the test to succeed if one of the two expectations is met: expect(mySpy.mostRecentCall.args[0]).toEqual(jasmine.any(Number)); ... more

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Logic Syntax Operators Prolog

03/27/19

Prolog "or" operator, query?

I'm working on some prolog that I'm new to. I'm looking for an "or" operator registered(X, Y), Y=ct101, Y=ct102, Y=ct103. Here's my query. What I want to write is code that will: "return X,... more

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Logic Notation Scala Unary Operator

03/27/19

Scala - Prefix Unary Operators?

I've recently given Scala a second chance, and started with the project I always implement (in functional or pseudo-functional languages): an automated reasoner for propositional logic (and later... more

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Logic Philosophy Cosmology Philosophy Of Science

03/26/19

Is the universe isomorphic to a universal turing machine?

I often think about problems that require an understanding of the very essence of computation and its inherent limitations. So, my questions are as followed: - Is the universe isomorphic to a... more

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Logic Algebra 1 Algebra 2

03/22/19

Which of the following statements about correlation and causation is true?

Which of the following statements about correlation and causation is true?Causation implies correlation.Correlation and causation are always unrelated.Correlation cannot occur without... more

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Logic Philosophy Philosophy Of Religion

03/19/19

Is it a fallacy, and if so which, to believe we are special because our existence on Earth seems improbable?

People often use the argument that there must be a God, for example, because Earth and the laws of physics are perfectly situated for humans to exist the way we do. However, if Earth or even the... more

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Logic Javascript If Statement Operator Precedence

03/19/19

Which Logic Operator Takes Precedence?

So, I'm looking into writing a slightly more complex operation with logic operators in an if-else statement. I know I can do parentheses, and I know it's the better way of doing this, but I've... more

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Logic Algorithm Arrays

03/19/19

Median of 5 sorted arrays?

I am trying to find the solution for median of 5 sorted arrays. This was an interview questions. The solution I could think of was merge the 5 arrays and then find the median [O(l+m+n+o+p)]. I... more

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Logic C++

03/19/19

C++ interview preparation?

I have a Phone interview coming up next with with a company which works in financial software industry. The interview is mainly going to be in C++ and problem solving and logic. Please tell me the... more

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Logic Philosophy Probability Terminology

03/19/19

Interpret Bayesian probability as frequentist probability?

It is usually said that the Bayesian probability is a subjective concept, quantifying one's degree of belief in something, while the frequentist probability is the the fraction of certain outcomes... more

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Logic Scala Functional Programming

03/19/19

Universal and Existential Quantifiers of First-Order Logic?

I am taking a Scala programming course. At one point the instructor said: > Functions *blah* and *bladdy* are the universal and existential > quantifiers of first-order logic. Could someone... more

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Logic Javascript

03/19/19

ReferenceError: Invalid left-hand side in assignment?

my code for a rock paper scissors game (called toss) is as follows: var toss = function (one,two) { if(one = "rock" && two = "rock") { console.log("Tie! Try again!"); } // more... more

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Logic Philosophy

03/19/19

What is the difference between "necessary" and "sufficient"?

What is the logical difference between something being necessary in order for something else to be true; as opposed to something being sufficient to make something else true. i.e. Fuel is... more

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Logic Sql Php Mysql

03/19/19

Showing Featured Item From the Database?

I have database table as below. id, bungalow_name, type, address, featured A bungalow can be featured in the home page. If a bungalow is featured, `featured` column has the value `1`. I have 50... more

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Logic Philosophy Proof Theology

03/19/19

Does a negative claimant have a burden of proof?

I have often heard it said that the burden of proof is on the positive claimant but not on the one making a negative claim. A person claiming, "God exists" has a burden of proof but not a person... more

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Logic Sql Oracle

03/18/19

Swapping column values in Oracle?

I was solving one of the puzzles and came across swapping column values using DML queries: SELECT * FROM TEMP_TABLE; ID1, ID2 -------- 20, 15 20, 15 20, 15 Solution is mathematical... more

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Logic C#

03/18/19

Why doesn't the C# compiler throw for logical comparisons of null?

I was eating lunch with a friend yesterday and they were complaining about `null` in C#. He stated that `null` was illogical. I decided to test his claims, so I tested some simple logical... more

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Logic Philosophy Modal Logic

03/18/19

What is modal logic for?

I understand "pure" logic as a structural description of what a valid proof is but I have never understood the reasons for using modal logic. What's an example typical of how modal logic is used?

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Logic First Order Logic

03/18/19

When to use conjunction and when to use implication? (First Order Logic)?

I'm learning First Order Logic at the moment. I'm looking at this example: Some dogs bark ∃x (dog(X) Λ bark(x)) All dogs have four legs ∀x (dog(x) -> have_four_legs(x)) My question is: is it... more

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Logic Java If Statement Refactoring

03/18/19

How can I simplify this set of if statements? (Or, what's making it feel so awkward?)?

My colleague showed me this piece of code, and we both wondered why we couldn't seem to remove duplicated code. private List parseResponse(Response response) { if (response.status().code() !=... more

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Logic Sql Oracle

03/18/19

oracle sql date not later than today?

I need to display some data if it's a - new data - updated data let's say, I will be basing these data from a publishdate column and updated column where publishdate and updateddate are both... more

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Logic Java If Statement

03/18/19

Why does this if statement, with an assignment and equality check, evaluate to false?

How does a Java *if statement* work when it has an assignment and an equality check `OR`-d together?? public static void test() { boolean test1 = true; if (test1 = false || test1 == false) { ... more

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Logic C++ C Logical Operators

03/18/19

What happens when you logical not a float?

I assume this just returns an int. Is there anything else going on I should be aware of? C/C++ differences? float a = 2.5; !a; // What does this return? Int? Float?

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Logic Philosophy

03/18/19

Are different values of nothing equivalent?

Are different values of nothing equivalent? Is 'no tigers' the same as 'no zebras'?

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Answers •1

Can someone explain this JavaScript auto executing function?

Jasmine expect logic (expect A OR B)?

Prolog "or" operator, query?

Scala - Prefix Unary Operators?

Is the universe isomorphic to a universal turing machine?

Which of the following statements about correlation and causation is true?

Is it a fallacy, and if so which, to believe we are special because our existence on Earth seems improbable?

Which Logic Operator Takes Precedence?

Median of 5 sorted arrays?

C++ interview preparation?

Interpret Bayesian probability as frequentist probability?

Universal and Existential Quantifiers of First-Order Logic?

ReferenceError: Invalid left-hand side in assignment?

What is the difference between "necessary" and "sufficient"?

Showing Featured Item From the Database?

Does a negative claimant have a burden of proof?

Swapping column values in Oracle?

Why doesn't the C# compiler throw for logical comparisons of null?

What is modal logic for?

When to use conjunction and when to use implication? (First Order Logic)?

How can I simplify this set of if statements? (Or, what's making it feel so awkward?)?

oracle sql date not later than today?

Why does this if statement, with an assignment and equality check, evaluate to false?

What happens when you logical not a float?

Are different values of nothing equivalent?

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