preface
A few days ago, I saw a popular article on digging gold “the days when I was an interviewer in Cool Kale”. The author of this article elaborates on what skills you should have as a Web candidate to be more marketable from an interviewer’s perspective.
In the process of comparing myself, I found some problems, maybe understand, but not comprehensive, which is also the reason for the birth of this series of articles.
What is a stack
The primitive type of storage space in JavaScript contains:
- Boolean
- Null
- Undefined
- Number
- String
- Symbol (new definition in ECMAScript 6)
Prototype types are stored In stack memory, fixed In size and ordered, following the last-in-first-out principle
In life, it is similar to organizing a book (the last book to be organized is always on top) :
What is a pile of
In addition to primitive JavaScript data types, there is another class of JavaScript data types called Object, which contains:
- Object
- Function
- Array
- Date
- RegExp
Object types are stored in heap memory and are variable in size and complexity.
To be precise:
Pointers to data of type Object are stored in stack memory space, and the value that the pointer actually points to is stored in heap memory space
What is a queue
The storage properties of queues and stack memory are similar
Queues are of variable size and ordered, following the first-in-first-out principle
It is in life, more types of queuing scene (first in line, first to eat) :
reference
- One point a day – talk about JavaScript data types
series
- One knowledge point a day