Deep understanding of promise in ES6

Author| Jeskson Source|Dada Front End Bistro What is Promise The Promise object is used to represent the final state (completion or failure) of an asynchronous operation and the value it returns. What is synchronous, asynchronous Synchronizing tasks can block program execution, such as alert, for Asynchronous tasks do not block program ex ...

Posted on Tue, 26 Nov 2019 17:11:26 -0800 by mick_otoole

Interface for GO Foundation

1. Concepts1. In object-oriented languages, interfaces are used to define the behavior of objects.Interfaces only specify what the object should do, and the way to implement this behavior (implementation details) is determined by the object.2. In the Go language, an interface is a set of method signatures. Interfaces specify only the methods ...

Posted on Thu, 07 Nov 2019 05:46:46 -0800 by melmoth

Class template case

demand To implement a general array class, the requirements are as follows: Data of built-in data type and custom data type can be stored. Store the data in the array to the heap The capacity of arrays that can be passed in the constructor Provide the corresponding copy constructor and operat ...

Posted on Sat, 02 Nov 2019 00:42:10 -0700 by Azazeal

Constructions of E and Isomorphism of Complementary Maps in the Multi-school Training Camp of Niuke in Summer of 2019 (Game 6)

https://ac.nowcoder.com/acm/contest/886#question Question: Whether there exists an undirected graph G with n vertices is the isomorphism of its complement graph H, if there exists an adjacency matrix of output G and the mapping of H with respect to G. Analytical and constructive questions, the answer is not unique. The original graph has the ...

Posted on Thu, 10 Oct 2019 11:30:23 -0700 by kirtan007

Shell Programming Loop Statement

This article is mainly about the use of shell script loop statements. for loop Designated number of times #!/bin/bash for ((i=1;i<=10;i++)) do echo $i done [root@localhost ~]# vim num.sh [root@localhost ~]# chmod +x num.sh [root@localhost ~]# ./num.sh 1 2 3 4 5 6 7 8 9 10 Ergodic cycle #!/bin/bash TMP=$(cat username.txt) for USER in $T ...

Posted on Wed, 09 Oct 2019 16:10:41 -0700 by Okami

Mysql Zone Actual Warfare

First, what is database partitioning Recently I wrote an article about MySQL table partitioning. Now let's talk about what database partitioning is. Take MySQL as an example. The data in MySQL database is stored on disk in the form of files. By default, it is placed under / mysql/data (which can be viewed by datadir in my.cnf). A table mainly c ...

Posted on Fri, 06 Sep 2019 01:19:40 -0700 by clicket

C++ STL Standard Template Library--set/multiset Concept and Simple Use

2019/8/19 Weather: Cloudy Basic concepts of set/multiset container Basic Concepts of set Containers Set feature: All elements are automatically sorted according to their key values. Set elements do not have both real and key values as map does. S ...

Posted on Mon, 19 Aug 2019 03:32:21 -0700 by freakuency

Deep Understanding of Promise-Promise's Characteristics and Methods

What is promise? Promise, which means to promise you a result after a period of time (usually an asynchronous operation), is a solution to asynchronous programming. Grammatically speaking, native Promise is an object from which messages for asynchronous operations can be obtained. Characteristics of promise The state of the object is not affect ...

Posted on Thu, 15 Aug 2019 03:14:32 -0700 by koldstar

Android Decompiled Smil

1. Smli data types 1. Dalvik byte code In Davlik byte codes, registers are 32-bit and can support any type. 64-bit types (Long/Double) are represented by two consecutive registers. There are two types of Dalvik byte codes: the original type; the reference type (including objects and arrays) Original type: v. void can only b ...

Posted on Thu, 13 Jun 2019 09:24:24 -0700 by kodstationen

jQuery's attributes, events and operations

1. Attribute operations 1.1 Basic Attribute Operations $("img").attr("src") returns the SRC attribute values of all images in the document $("img").attr("src","test.jpg") sets the SRC attribute values for all images in the document $("img").removeAttr("src") deletes the SRC ...

Posted on Mon, 03 Jun 2019 19:15:53 -0700 by vtb