How deeply does .NET in Action, Second Edition cover deferred execution?

Explains that Select returns IEnumerable and execution waits for enumeration, while deferring fuller treatment to later chapters.

Deferred execution

As explained in .NET in Action, Second Edition

Deferred execution is evaluation of a query only when the resulting sequence is enumerated or otherwise requested.

A LINQ query built with Select returns an IEnumerable; it is not executed until code requests an enumerator. This separates building a query from evaluating it. section 3.1.1

Listing 3.9 LINQ query translated to methods

public static Lazy<IEnumerable<string>> AllFonts =
  new (() =>
    typeof(FiggleFonts)                             #1
    .GetProperties(
      BindingFlags.Public | BindingFlags.Static)
    .Select(p => p.Name));                          #2

Compare the query-syntax form with its method-chain equivalent: both produce an enumerable whose query waits for enumeration. section 3.1.1

How .NET in Action, Second Edition covers it

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Related concepts

schedulingused by · Scheduling is the planning and coordination of when and in what order activities or computational work occur, potentially assigning them to available resources subject to constraints.
eager evaluationcontrasts with · Eager evaluation is an execution strategy that computes expressions or performs operations immediately rather than deferring them until their results are needed.
LINQused by · LINQ is a .NET language-integrated query technology for querying and transforming data from collections and other data sources.
meanaddresses · A mean is a measure of central tendency, calculated as the arithmetic average of values or, for a random variable, as the probability-weighted average of its possible values.

This explainer was generated by Manning's knowledge graph from the text of .NET in Action, Second Edition. The section links point to the parts of the book it draws on.