How deeply does D3.js in Action, Third Edition cover dotted notation?

Defines dotted access, contrasts bracket notation, and applies both within dataset iteration.

Dotted notation

As explained in D3.js in Action, Third Edition

Dot notation is JavaScript property access syntax that places a property name after an object and a period.

Dotted notation is JavaScript property access syntax: place a property name after an object and a period, as in row1.name. It reads values from objects and supports working with object-based datasets. section 1.2.5

Reading employee data

Given an employee object, row1.name returns "Zoe" and row1.works_with_d3 returns false. Bracket notation provides an alternative when a property name contains spaces or comes from a variable: row1[myProperty].

Arrays of objects commonly hold datasets. Inside forEach, map, filter, and find callbacks, dotted notation reaches each datum’s properties for conversion, extraction, selection, and lookup.

How D3.js in Action, Third Edition covers it

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Also explained in

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The Well-Grounded Rubyist, Fourth EditionThe dot operator is Ruby syntax that sends the expression on its right as a message to the object on its left.
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Get Programming: Learn to code with PythonDot notation is Python syntax that accesses an operation or attribute through an object by placing a dot between the object and the member name.
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MongoDB 8.0 in Action, Third EditionDot notation is MongoDB query syntax that accesses fields in nested documents or fields across array elements by joining path components with periods.
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Data-Oriented Programming: Reduce software complexityDot notation is syntax for accessing a named property or member through a dot-separated expression.
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Django in ActionDot notation is syntax that accesses attributes, collection items, dictionary values, or no-argument callables through period-separated names.
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Learn Rust in a Month of LunchesDot notation is Rust syntax that accesses a tuple element or object member by placing a period before its selector.
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Pandas Workout: 200 exercises to make you a stronger data analystDot notation is attribute-access syntax that can retrieve a pandas column when its label is a valid Python identifier and does not conflict with an attribute.
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The Quick Python Book, Fourth EditionDot notation is syntax that accesses an attribute or method by placing its name after an object and a period.

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Related concepts

attributeuses · An attribute is a named property, value, or piece of information associated with an entity, object, or program element.
dereferencingimplements · Dereferencing is the operation of following a pointer or reference to access the object or value it designates.
subdocumentuses · A subdocument is a document nested within another document and stored as part of the containing document.
indexingalternative to · Indexing is the organization or use of positions, keys, or lookup structures to identify and retrieve selected data or elements.
square bracketsalternative to · Square brackets are paired punctuation marks used in programming-language syntax to delimit expressions or constructs, including indexing and collection literals.
structuses · A struct is a composite data type or structure that groups related fields or values into a single unit.

This explainer was generated by Manning's knowledge graph from the text of D3.js in Action, Third Edition. The section links point to the parts of the book it draws on.