THINK++ — Engineering Visualized

Anonymous Functions

Lambda Functions

Introduced in C++11, lambdas are inline, anonymous functions that can capture variables from their surrounding scope.

ANATOMY

[capture](parameters) -> return_type {
    // function body
};

PRACTICAL EXAMPLE (Custom Sort)

sort(v.begin(), v.end(), [](int a, int b) {
    return a > b; // Descending order
});

CAPTURE CLAUSE

[]: No capture. [&]: Capture by reference. [=]: Capture by value.

ON THE FLY

Great for short-lived logic that doesn't deserve a full function definition.

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