Fundamentally, macros are a way of writing code that writes other code, which is known as metaprogramming. In Appendix C, we discuss the derive attribute, which generates an implementation of various traits for you.

Metaprogramming is useful for reducing the amount of code you have to write and maintain, which is also one of the roles of functions. A function signature must declare the number and type of parameters the function has. Macros, on the other hand, can take a variable number of parameters: we can call println! Also, macros are expanded before the compiler interprets the meaning of the code, so a macro can, for example, implement a trait on a given type.

Due to this indirection, macro definitions are generally more difficult to read, understand, and maintain than function definitions.

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Another important difference between macros and functions is that you must define macros or bring them into scope before you call them in a file, as opposed to functions you can define anywhere and call anywhere. The most widely used form of macros in Rust is declarative macros. As discussed in Chapter 6, match expressions are control structures that take an expression, compare the resulting value of the expression to patterns, and then run the code associated with the matching pattern.

Macros also compare a value to patterns that are associated with particular code: in this situation, the value is the literal Rust source code passed to the macro; the patterns are compared with the structure of that source code; and the code associated with each pattern, when matched, replaces the code passed to the macro. This all happens during compilation. Chapter 8 covered how we can use the vec! For example, the following macro creates a new vector containing three integers:.

We could also use the vec! Listing A simplified version of the vec! Note: The actual definition of the vec! The name, in this case vecis followed by curly brackets denoting the body of the macro definition.

The structure in the vec! If the pattern matches, the associated block of code will be emitted. Given that this is the only pattern in this macro, there is only one valid way to match; any other pattern will result in an error.

More complex macros will have more than one arm. Valid pattern syntax in macro definitions is different than the pattern syntax covered in Chapter 18 because macro patterns are matched against Rust code structure rather than values.

First, a set of parentheses encompasses the whole pattern. When we call this macro with vec!

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In the future, Rust will have a second kind of declarative macro that will work in a similar fashion but fix some of these edge cases. The second form of macros is procedural macroswhich act more like functions and are a type of procedure.

Procedural macros accept some code as an input, operate on that code, and produce some code as an output rather than matching against patterns and replacing the code with other code as declarative macros do. The three kinds of procedural macros custom derive, attribute-like, and function-like all work in a similar fashion.Installing a macro on a regular keyboard and mouse occurs in two clicks. Hello everyone This macro is intended for AK 8x weapons Sens 1.

Excellent macro on the LR, everything flies to the point. Any mouse on the r. AK sens 0. Kalash macro sens 0. Berdanka [1. Macro from kadzuto So! If you have any questions write to Sens 1. Legit macro AK Close-up on Kalash Fov 90 Sens 0. AK - 47 Sens 0. The macro for the game Rust for an AK - Settings in the program: 1.

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Pump RAID. Automatic RAID with a pump-action shotgun, useful for mod servers. It fires and. Paid macro. Bought for rubles. Went with other macros Berdan rifle, puli.

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HetZ - Rust Berdanka private. HetZ - Rust Berdanka private 4x. Revolver xzimat.The functionality and syntax of Rust can be extended with custom definitions called macros. A macro invocation executes a macro at compile time and replaces the invocation with the result of the macro.

Macros may be invoked in the following situations:. When used as an item or a statement, the MacroInvocationSemi form is used where a semicolon is required at the end when not using curly braces.

Introduction 1. Notation 2. Lexical structure 2. Input format 2. Keywords 2. Identifiers 2. Comments 2. Whitespace 2. Tokens 2. Paths 3. Macros 3. Macros By Example 3. Procedural Macros 4. Crates and source files 5. Conditional compilation 6.

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Items 6. Modules 6. Extern crates 6. Use declarations 6. Functions 6. Type aliases 6. Structs 6.In Pearsall, Deborah M. Journal of the American Statistical Association. How to Lie with Statistics.

Studies in the history of statistical method. The Principles of Experimentation, Illustrated by a Psycho-physical Experiment, Section 8. Fisher, The Design of Experiments ii. American Educational Research Journal.

Fisher and the Design of Experiments, 1922-1926". Journal of the Royal Statistical Society. A statistic (singular) or sample statistic is a single measure of some attribute of a sample (e. A statistic is distinct from a statistical parameter, which is not computable, because often the population is too large to examine and measure all its items.

However, a statistic, when used to estimate a population parameter, is called an estimator. For instance, the sample mean is a statistic that estimates the population mean, which is a parameter. In calculating the arithmetic mean of a sample, for example, the algorithm works by summing all the data values observed in the sample and then dividing this sum by the number of data items.

A statistic is an observable random variable, which differentiates it both from a parameter that is a generally unobservable quantity describing a property of a statistical population, and from an unobservable random variable, such as the difference between an observed measurement and a population average. Statisticians often contemplate a parameterized family of probability distributions, any member of which could be the distribution of some measurable aspect of each member of a population, from which a sample is drawn randomly.

For example, the parameter may be the average height of 25-year-old men in North America. The average of the heights of all members of the population is not a statistic unless that has somehow also been ascertained (such as by measuring every member of the population). The average height that would be calculated using all of the individual heights of all 25-year-old North American men is a parameter, and not a statistic.

Important potential properties of statistics include completeness, consistency, sufficiency, unbiasedness, minimum mean square error, low variance, robustness, and computational convenience.

Information of a statistic on model parameters can be defined in several ways. The most common is the Fisher information, which is defined on the statistic model induced by the statistic. Kullback information measure can also be used. From Wikipedia, the free encyclopedia Jump to: navigation, searchFor other uses, see Statistics (disambiguation).

This article needs additional citations for verification. Mathematical statistics is the application of mathematics to statistics, which was originally conceived as the science of the state the collection and analysis of facts about a country: its economy, land, military, population, and so on. Mathematical techniques which are used for this include mathematical analysis, linear algebra, stochastic analysis, differential equations, and measure-theoretic probability theory.

The initial analysis of the data from properly randomized studies often follows the study protocol.Managerial influence may also make it worth watching the fortunes of Preston (20-1), who have Alex Neil, who was tipped for the top when he won promotion with Norwich, at the helm.

Harry Redknapp at Birmingham will be hard to ignore and their odds are just 7-1. If you are after an outsider, former Rangers boss Mark Warburton could surprise a few people at Nottingham Forest, who are finally free of the chaotic ownership of Fawaz al-Hasawi and available at 12-1.

The Rust Programming Language

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The GM Tipster got ready for the Open Championship by picking the winner and three of the top 5 in the John Deere Classic last weekend. To have a look at how he is doing so far this season check out our golf betting tips homepage. Has a low round in him and not going to get better odds on him now. Is one under par and very much in the hunt. I am ecstatic that I can now get on him as I thought the opportunity had passed.

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He still very much has the game to compete and at this price he has a great each way chance. He is a player who really rises to the big occasion and had incredible form on links courses in 2016.

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