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Lodash 4 Cookbook
Lodash 4 Cookbook
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Lodash 4 Cookbook

Last updated on 2018-12-13

About the Book

In modern web development, JavaScript is a must-to-learn programming language. Using JavaScript is not an easy task. Most of JavaScript APIs are low-level APIs, which are hard to learn and use. Lodash is a popular JavaScript utility framework. It provides a lot of high-level APIs which are more convenient to remember and use. Developers can dramatically increase productivity by using lodash.

This book is a very good start point to learn lodash 4 and apply it in practice. It covers core concepts and functions provided by lodash with real examples. For some complicated functions, e.g. functions related to functional programming, this book has a more detailed explanation.

Most of the code examples are written as Jest test cases with ES6.

About the Author

Fu Cheng
Fu Cheng

Full-stack software developer and lead software engineer at a healthcare startup.

  • Understanding the Java 7: the Core techniques and best practice (Simplified Chinese edition) covers Java SE 7 new features and deep dive of Java platform core features.
  • Build Mobile Apps with Ionic 2 and Firebase covers building mobile apps using Ionic 2 and Firebase.
  • Exploring Java 9 covers Java 9 module system and other new features.
  • A regular author on IBM developerWorks China and InfoQ China website with more than 50 published technical articles covering various technical topics.

Table of Contents

  • 1. Introduction
    • 1.1 Installation
      • 1.1.1 Web
      • 1.1.2 NodeJS
    • 1.2 Lodash features
    • 1.3 Code sample convention
    • 1.4 About this book
  • 2. Common concepts
    • 2.1 Truthy and falsy
    • 2.2 SameValueZero
    • 2.3 Predicates
      • 2.3.1 matches
      • 2.3.2 matchesProperty
      • 2.3.3 property
    • 2.4 Iteratees
      • 2.4.1 Iteratee shorthand
    • 2.5 this binding
  • 3. Collections
    • 3.1 Each
    • 3.2 Every and some
    • 3.3 Filter and reject
    • 3.4 Size
    • 3.5 Includes
    • 3.6 Sample
    • 3.7 Shuffle
    • 3.8 Partition
    • 3.9 Count by
    • 3.10 Group by and key by
    • 3.11 invokeMap
    • 3.12 Map and reduce
      • 3.12.1 Map
      • 3.12.2 Reduce
    • 3.13 Search
      • 3.13.1 find
      • 3.13.2 findLast
    • 3.14 Sort
    • 3.15 flatMap
  • 4. Arrays
    • 4.1 Search
    • 4.2 Set operations
      • 4.2.1 Equality comparisons
      • 4.2.2 Unique
      • 4.2.3 Union
      • 4.2.4 Difference
      • 4.2.5 Intersection
      • 4.2.6 Symmetric difference
    • 4.3 Chunk
    • 4.4 Compact
    • 4.5 Fill
    • 4.6 Flatten
    • 4.7 Remove
      • 4.7.1 remove
      • 4.7.2 pull
      • 4.7.3 pullAt
      • 4.7.4 pullAll
      • 4.7.5 without
    • 4.8 Zip
      • 4.8.1 zip
      • 4.8.2 zipWith
      • 4.8.3 zipObject
      • 4.8.4 zipObjectDeep
      • 4.8.5 unzip
    • 4.9 Partition
      • 4.9.1 first
      • 4.9.2 last
      • 4.9.3 initial
      • 4.9.4 tail
    • 4.10 Slicing
      • 4.10.1 Basic slicing
      • 4.10.2 Drop elements
      • 4.10.3 Take elements
    • 4.11 Sorted arrays
    • 4.12 Concatenation
    • 4.13 From pairs
    • 4.14 Join
    • 4.15 Reverse
    • 4.16 Nth element
  • 5. Objects
    • 5.1 Assign
      • 5.1.1 assign
      • 5.1.2 assignIn
      • 5.1.3 assignInWith
    • 5.2 Merge
      • 5.2.1 merge
      • 5.2.2 mergeWith
    • 5.3 Transform
    • 5.4 Create
    • 5.5 Default values
    • 5.6 Function names
      • 5.6.1 functions
      • 5.6.2 functionsIn
    • 5.7 Invert
      • 5.7.1 invert
      • 5.7.2 invertBy
    • 5.8 Keys and values
      • 5.8.1 has
      • 5.8.2 hasIn
      • 5.8.3 keys and keysIn
      • 5.8.4 values and valuesIn
      • 5.8.5 mapValues
      • 5.8.6 mapKeys
      • 5.8.7 result
      • 5.8.8 toPairs and toPairsIn
    • 5.9 Pick and omit
      • 5.9.1 pick and pickBy
      • 5.9.2 omit and omitBy
    • 5.10 Iterate
      • 5.10.1 forIn and forInRight
      • 5.10.2 forOwn and forOwnRight
    • 5.11 Get and set
      • 5.11.1 get
      • 5.11.2 set
      • 5.11.3 setWith
      • 5.11.4 update
    • 5.12 At
    • 5.13 Find key
  • 6. Functions
    • 6.1 Bind
    • 6.2 Before and after
      • 6.2.1 before
      • 6.2.2 after
    • 6.3 Ary
    • 6.4 Partial
      • 6.4.1 partial
      • 6.4.2 partialRight
    • 6.5 Curry
    • 6.6 Flow
    • 6.7 Defer
    • 6.8 Once
    • 6.9 Negate
    • 6.10 Spread
    • 6.11 Wrap
    • 6.12 Rearg
    • 6.13 Rest parameters
    • 6.14 Debounce and throttle
      • 6.14.1 Debounce
      • 6.14.2 Throttle
    • 6.15 Memoize
    • 6.16 Modify arguments
    • 6.17 Flip arguments
  • 7. Strings
    • 7.1 Character cases
      • 7.1.1 capitalize
      • 7.1.2 camelCase
      • 7.1.3 snakeCase
      • 7.1.4 kebabCase
      • 7.1.5 startCase
    • 7.2 Search
    • 7.3 Escape
    • 7.4 Pad
    • 7.5 Trim
    • 7.6 Repeat
    • 7.7 Truncate
    • 7.8 parseInt
    • 7.9 Words
    • 7.10 Replace
    • 7.11 Split
    • 7.12 Uppercase and lowercase
      • 7.12.1 upperCase
      • 7.12.2 upperFirst
      • 7.12.3 toUpper
      • 7.12.4 lowerCase
      • 7.12.5 lowerFirst
      • 7.12.6 toLower
  • 8. Miscellaneous
    • 8.1 Types
      • 8.1.1 Type check
      • 8.1.2 Type conversion
    • 8.2 Clone
    • 8.3 Date
    • 8.4 Math
      • 8.4.1 Add
      • 8.4.2 Subtract
      • 8.4.3 Multiply
      • 8.4.4 Divide
      • 8.4.5 Max
      • 8.4.6 Min
      • 8.4.7 Sum
      • 8.4.8 Ceil
      • 8.4.9 Floor
      • 8.4.10 Round
      • 8.4.11 Mean
    • 8.5 Number
      • 8.5.1 inRange
      • 8.5.2 clamp
      • 8.5.3 Random numbers
    • 8.6 Comparison
      • 8.6.1 isEqual and isEqualWith
      • 8.6.2 eq
      • 8.6.3 gt and gte
    • 8.7 Utilities
      • 8.7.1 attempt
      • 8.7.2 constant
      • 8.7.3 identity
      • 8.7.4 noop
      • 8.7.5 noConflict
      • 8.7.6 Range
      • 8.7.7 times
      • 8.7.8 uniqueId
      • 8.7.9 Method
      • 8.7.10 cond
      • 8.7.11 conforms
      • 8.7.12 nthArg
      • 8.7.13 over, overEvery and overSome
      • 8.7.14 toPath
      • 8.7.15 castArray
    • 8.8 Stub
    • 8.9 Default to
  • 9. Chaining
    • 9.1 Wrapper
    • 9.2 Explicit chaining
    • 9.3 tap
    • 9.4 thru
  • 10. String templates
    • 10.1 interpolate
    • 10.2 escape
    • 10.3 evaluate
    • 10.4 imports
    • 10.5 Data object name
  • 11. Recipes
    • 11.1 Filter an object’s properties
      • 11.1.1 Scenario
      • 11.1.2 Solution
    • 11.2 Push an array of elements into an array
      • 11.2.1 Scenario
      • 11.2.2 Solution
    • 11.3 Process data for C3.js pie chart
      • 11.3.1 Scenario
      • 11.3.2 Solution
    • 11.4 Create a unique array of objects
      • 11.4.1 Scenario
      • 11.4.2 Solution
    • 11.5 Convert an array to an object
      • 11.5.1 Scenario
      • 11.5.2 Solution
  • Notes

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