the safe navigation operator (also known as optional chaining operator, safe call operator, null-conditional operator, null-propagation operator) is a...

Equivalent to */ $a = $a ?? $b; Since version 8.0 PHP also supports Safe navigation operator (?->). $variable = $object?->method(); /* Equivalent to */ $variable...

the Elvis operator. ?: or conditional operator, when used as a ternary operator Null coalescing operator, ?? operator Safe navigation operator, often ?...

languages, string concatenation is a binary infix operator, and in some it is written without an operator. This is implemented in different ways: Overloading...

explicitly, or with the aid of Kotlin's null-safe operators: ?. (the safe navigation operator) can be used to safely access a method or property of a possibly...

that use null-safe types by default include JetBrains' Kotlin, Rust, and Apple's Swift. Nullable type Option type Safe navigation operator C.A.R. Hoare:...

direct checking of key/value pairs instead of just keys. A new safe navigation operator &. that can ease nil handling (e.g. instead of if obj && obj.foo...

a ternary operator Elvis operator, a binary operator in certain computer programming languages Safe navigation operator, a binary operator in object-oriented...

McCarthy Formalism Multiplexer Null coalescing operator, ?? operator Safe navigation operator, often ?. Strachey, Christopher (2000). "Fundamental Concepts...

doom, e.g. used in JavaScript Law of Demeter Safe navigation operator, a programming language operator that lets one avoid the pyramid of doom Dave Herman...

iteration, string interpolation, added helper methods, and the safe navigation operator ?. to check automatically for null pointers (for example, variable...

of the new operator to create value type objects, but these value type objects are created on the stack regardless of whether the operator is used or...

In engineering, a fail-safe is a design feature or practice that, in the event of a failure of the design feature, inherently responds in a way that will...

length arrays. This feature leads to possibly non-compile time sizeof operator. void foo(size_t x, int a[*]); // VLA declaration void foo(size_t x, int...

employed using the && and || operators together with operators such as ++, +=, the comma operator, etc. The && and || operators thereby function as combinations...

Radio navigation or radionavigation is the application of radio waves to determine a position of an object on the Earth, either the vessel or an obstruction...

Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator...

5 ** * math-like notation TUTOR (2 + 3)(45) $$ note implicit multiply operator A language that supports the statement construct typically has rules for...

The basic principles of air navigation are identical to general navigation, which includes the process of planning, recording, and controlling the movement...

arranged for different handling of these events. Thus, these languages fail safely in this regard. Some (mostly older) languages require that programmers explicitly...

Object-oriented constructors Operators Ternary conditional operator Null coalescing operators Safe navigation operators Modulo operators Evaluation strategy List...

Object-oriented constructors Operators Ternary conditional operator Null coalescing operators Safe navigation operators Modulo operators Evaluation strategy List...

cast) with optional dynamic type (see dynamic member lookup) It is almost safe, unsafe features are not commonly used. Optionally, typing can be explicitly...

C++ features user-defined operator overloading. Operator overloading allows for user-defined types to support operators (arithmetic, comparisons, etc...

commercial flights. Modern electronic navigation systems made the navigator redundant by the early 1980s. Radio Operator (archaic). A position on much older...

markers sharing the waterways rules and regulations emergencies safe boat operation navigation emergency preparedness fueling safety craft loading craft inspection...

languages. Different languages use different symbols for the concatenation operator. Many languages use the "+" symbol, though several deviate from this. AWK...

compound operators so that longer lines like: variable = variable + 1 can now be written as: variable += 1 However, increment and decrement operators are not...

Object-oriented constructors Operators Ternary conditional operator Null coalescing operators Safe navigation operators Modulo operators Evaluation strategy List...

can only be applied if the member implements a single interface. Like operator for pattern comparison of strings in a much simpler way than using regular...