Lodash 4 Cookbook
Lodash 4 Cookbook
For lodash 4.17.21
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
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
-
1.1 Installation
-
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
-
2.3.1
-
2.4 Iteratees
- 2.4.1 Iteratee shorthand
-
2.5
thisbinding
-
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
-
3.13.1
- 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
-
4.7.1
-
4.8 Zip
-
4.8.1
zip -
4.8.2
zipWith -
4.8.3
zipObject -
4.8.4
zipObjectDeep -
4.8.5
unzip
-
4.8.1
-
4.9 Partition
-
4.9.1
first -
4.9.2
last -
4.9.3
initial -
4.9.4
tail
-
4.9.1
-
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
-
5.1.1
-
5.2 Merge
-
5.2.1
merge -
5.2.2
mergeWith
-
5.2.1
- 5.3 Transform
- 5.4 Create
- 5.5 Default values
-
5.6 Function names
-
5.6.1
functions -
5.6.2
functionsIn
-
5.6.1
-
5.7 Invert
-
5.7.1
invert -
5.7.2
invertBy
-
5.7.1
-
5.8 Keys and values
-
5.8.1
has -
5.8.2
hasIn -
5.8.3
keysandkeysIn -
5.8.4
valuesandvaluesIn -
5.8.5
mapValues -
5.8.6
mapKeys -
5.8.7
result -
5.8.8
toPairsandtoPairsIn
-
5.8.1
-
5.9 Pick and omit
-
5.9.1
pickandpickBy -
5.9.2
omitandomitBy
-
5.9.1
-
5.10 Iterate
-
5.10.1
forInandforInRight -
5.10.2
forOwnandforOwnRight
-
5.10.1
-
5.11 Get and set
-
5.11.1
get -
5.11.2
set -
5.11.3
setWith -
5.11.4
update
-
5.11.1
- 5.12 At
- 5.13 Find key
-
5.1 Assign
-
6. Functions
- 6.1 Bind
-
6.2 Before and after
-
6.2.1
before -
6.2.2
after
-
6.2.1
- 6.3 Ary
-
6.4 Partial
-
6.4.1
partial -
6.4.2
partialRight
-
6.4.1
- 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
-
7.1.1
- 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
-
7.12.1
-
7.1 Character cases
-
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
-
8.5.1
-
8.6 Comparison
-
8.6.1
isEqualandisEqualWith -
8.6.2
eq -
8.6.3
gtandgte
-
8.6.1
-
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,overEveryandoverSome -
8.7.14
toPath -
8.7.15
castArray
-
8.7.1
- 8.8 Stub
- 8.9 Default to
-
8.1 Types
-
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
-
11.1 Filter an object’s properties
- Notes
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