October 2019
Intermediate to advanced
444 pages
10h 37m
English
Content preview from Rust Programming Cookbook
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How it works...
In this recipe, we created a simple statistics toolbox that allows normal distribution samples to be analyzed quickly and accurately. However, this example was only chosen to illustrate the ways of how lifetimes are useful and comparatively simple. In Step 2, we are creating a function to calculate the mean of a given collection. Since lifetimes can be inferred from using the functions/variables, explicit specification of the lifetime is optional. Nevertheless, the function explicitly ties the input parameter's lifetime to the function's lifetime, requiring any reference that is passed in to outlive mean().
Steps 3 and 4 show how to deal with lifetimes in structs and their implementations. Since type instances can easily outlive ...
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