Conditional constructs | Compiler optimizations

Short-circuit evaluation

Short-circuit evaluation, minimal evaluation, or McCarthy evaluation (after John McCarthy) is the semantics of some Boolean operators in some programming languages in which the second argument is executed or evaluated only if the first argument does not suffice to determine the value of the expression: when the first argument of the AND function evaluates to false, the overall value must be false; and when the first argument of the OR function evaluates to true, the overall value must be true. In programming languages with lazy evaluation (Lisp, Perl, Haskell), the usual Boolean operators are short-circuit. In others (Ada, Java, Delphi), both short-circuit and standard Boolean operators are available. For some Boolean operations, like exclusive or (XOR), it is not possible to short-circuit, because both operands are always required to determine the result. Short-circuit operators are, in effect, control structures rather than simple arithmetic operators, as they are not strict. In imperative language terms (notably C and C++), where side effects are important, short-circuit operators introduce a sequence point – they completely evaluate the first argument, including any side effects, before (optionally) processing the second argument. ALGOL 68 used proceduring to achieve user-defined short-circuit operators and procedures. The use of short-circuit operators has been criticized as problematic: The conditional connectives — "cand" and "cor" for short — are ... less innocent than they might seem at first sight. For instance, cor does not distribute over cand: compare (A cand B) cor C with (A cor C) cand (B cor C); in the case ¬A ∧ C , the second expression requires B to be defined, the first one does not. Because the conditional connectives thus complicate the formal reasoning about programs, they are better avoided. — Edsger W. Dijkstra (Wikipedia).

Video thumbnail

Evaluating the composition of cosine and sine inverse

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Evaluating for the composition of sine and inverse sine

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Evaluate the expression for the composition of inverse sine and cosine

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Logical operators && TRICKS with short-circuit evaluation - Beau teaches JavaScript

Short-circuit evaluation happens when using conditionals with && or ||. The second argument is only evaluated when the first argument is not enough to determine the value of the expression. Learn some tricks using short-circuit evaluation in JavaScript. Code: 🔗 http://codepen.io/beaucarn

From playlist JavaScript Basics Course

Video thumbnail

Tutorial for how to evaluate for the composition of two trigonometric functions

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Reconstruction of arithmetic circuits by Chandan Saha

Discussion Meeting Workshop on Algebraic Complexity Theory ORGANIZERS: Prahladh Harsha, Ramprasad Saptharishi and Srikanth Srinivasan DATE: 25 March 2019 to 29 March 2019 VENUE: Madhava Lecture Hall, ICTS Bangalore Algebraic complexity aims at understanding the computational aspects o

From playlist Workshop on Algebraic Complexity Theory 2019

Video thumbnail

zkSNARKs -- Recent progress and applications to blockchain protocols by Chaya Ganesh

DISCUSSION MEETING : FOUNDATIONAL ASPECTS OF BLOCKCHAIN TECHNOLOGY ORGANIZERS : Pandu Rangan Chandrasekaran DATE : 15 to 17 January 2020 VENUE : Madhava Lecture Hall, ICTS, Bangalore Blockchain technology is among one of the most influential disruptive technologies of the current decade.

From playlist Foundational Aspects of Blockchain Technology 2020

Video thumbnail

Stanford Seminar - Doubly-efficient zkSNARKs Without Trusted Setup

zkSNARKs: what are they? How do their principles apply to security? And more importantly, what is their relationship to cryptocurrency? Join Riad Wahby as he presents his team’s work on Zero-Knowledge Succinct Non-Interactive Argument of Knowledge, also known as zkSNARKs. This presentat

From playlist Stanford Seminars

Video thumbnail

Evaluate the composition of sine and sine inverse

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Evaluating the composition of inverse functions trigonometry

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Secure computation with RAMs - Dr Mariana Raykova, Yale University

Secure computation with RAMs: revisiting square root ORAM and low leakage secure Boolean queries Hiding memory access patterns is required for secure computation, but remains prohibitively expensive for many interesting applications. This talk presents two works addressing this question:

From playlist Turing Seminars

Video thumbnail

How to evaluate for the composition of two trigonometric functions

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

2. Bentley Rules for Optimizing Work

MIT 6.172 Performance Engineering of Software Systems, Fall 2018 Instructor: Julian Shun View the complete course: https://ocw.mit.edu/6-172F18 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63VIBQVWguXxZZi0566y7Wf Prof. Shun discusses Bentley Rules for optimizing work

From playlist MIT 6.172 Performance Engineering of Software Systems, Fall 2018

Video thumbnail

Stanford Seminar - Protecting Patient Privacy in Genomic Analysis

One of the challenges for patients with rare diseases is the lack of local data to use for analysis. As a result, patients are having to rely on 3rd party facilities to carry out the computations based on data collected around the globe. But due to patient privacy concerns, as well as heav

From playlist Stanford Seminars

Video thumbnail

Deeper Combinatorial Lower Bounds - Siu Man Chan

Siu Man Chan Princeton University January 21, 2014 We will discuss space and parallel complexity, ranging from some classical results which motivated the study, to some recent results concerning combinatorial lower bounds in restricted settings. We will highlight some of their connections

From playlist Mathematics

Video thumbnail

Kristan Temme: "A rigorous and robust quantum speed-up in supervised machine learning"

Entropy Inequalities, Quantum Information and Quantum Physics 2021 "A rigorous and robust quantum speed-up in supervised machine learning" Kristan Temme - IBM Research Abstract: Over the past few years several quantum machine learning algorithms were proposed that promise quantum speed-u

From playlist Entropy Inequalities, Quantum Information and Quantum Physics 2021

Video thumbnail

Evaluate the composition of inverse trig function with a negative value

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Evaluating the composition of Functions

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Evaluating the composition of Functions

👉 Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Lec 11 | MIT 6.002 Circuits and Electronics, Spring 2007

Small signal circuits View the complete course: http://ocw.mit.edu/6-002S07 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

From playlist MIT 6.002 Circuits and Electronics, Spring 2007

Related pages

John McCarthy (computer scientist) | Lua (programming language) | Eiffel (programming language) | Julia (programming language) | Edsger W. Dijkstra | Hoare logic | MATLAB | Logical connective | Strict function | R (programming language) | Lazy evaluation | Wolfram Language | Erlang (programming language) | Exclusive or