Introduction to MongoDB Rookie (1): Concepts and Additions, Deletions, Revisions, and Indexing

I. Start-up Specify - dbpath as the storage folder and start with the default port mongod.exe --dbpath c:\data\db 2. windows Adding Services To set mongodb as a windows service mongod.exe --bind_ip yourIPadress --logpath "C:\data\dbConf\mongodb.log" --logappend --dbpath "C:\data\db" --port yourPortNumber --serviceName "YourServiceName" ...

Posted by Michael Lasky on Sat, 08 Jun 2019 01:15:02 +0200

Water ripple effect-Ripple

When it comes to water ripple effects, we need to talk about Ripple. Since Android 5.0, google has introduced a set of UI design language material design, commonly known as material design. One of the most intuitive effects is ripple effect (ripple effect), that is, clickable controls will have a wave effect. The effect is Ripple Dirawable ...

Posted by dmrn on Sat, 08 Jun 2019 00:55:29 +0200

Summary of SQL Statements in MySQL Database

Create a database create database database name [other options]; Create database tables create table Table Name(Column Statement); ## Taking the creation of students table as an example, the table will store such contents as student number (id), name (name), sex (age), contact telephone (tel): create table students ( id int ...

Posted by Mikester on Thu, 06 Jun 2019 21:53:47 +0200

How to Judge the Equality of Two Objects in the JavaScript Project

The twelfth article in the JavaScript series explains how to determine whether two parameters are equal Preface Although the title describes how to judge the equality of two objects, in this article we not only judge the equality of two objects, but in fact, what we want to do is how to judge the equality of two parameters, which will inevitabl ...

Posted by JDcrack on Thu, 06 Jun 2019 21:41:11 +0200

Data Structure-Loop List

One Circular linked list is another form of chain storage structure. Its characteristic is that the pointer field of the last node in the list points to the head node, and the whole list forms a ring. From any node in the table, other nodes in the table can be found. Its operation is basically the same as that of single linked list. The diffe ...

Posted by gcussi on Thu, 06 Jun 2019 00:55:26 +0200

Android sensor System Framework (II)

Updated at http://www.cnblogs.com/hackfun/p/7327320.html (D) How to load access. so Libraries In the previous blog http://www.cnblogs.com/hackfun/p/7327320.html, know how to generateA. so Library of HAL, where we will analyze how to load the HAL and how to re-encapsulate it for multi-client access.In fact, the system finds the corresponding. so ...

Posted by 4rxsid on Wed, 05 Jun 2019 22:53:22 +0200

Semaphore (dispatch_semaphore_t) - Implement multiple requests for one page

Goal: Achieve multiple requests for one page We often encounter situations where, for example, there are multiple interfaces in the data display of the user interface, and the page is displayed when our data request is complete.What should I do now?Or what do we do when the interfaces inside go from one layer to another (for example, we need to ...

Posted by thecard on Wed, 05 Jun 2019 18:32:40 +0200

Database int, what does the char field length mean

Database int, what is the length after the char field First come to the conclusion:The length of the int field has nothing to do with the length of the data you store, but with the display.The length of the char field is related to the length of the data you store int field length Start with int and look at the table below CREATE TABLE `test10` ...

Posted by bulrush on Tue, 04 Jun 2019 18:33:17 +0200

Python: A Brief Analysis of the Pit Excavated by return and finally

Initial knowledge of return _Believe that every child shoe that has used Python function will definitely use return statement. As the name implies, return is used to return value to the caller, for example: def test(): a = 2 return a s = test() print s # Output result 2 For the above results, I believe that everyone will not be surpri ...

Posted by sidhumaharaj on Tue, 04 Jun 2019 04:04:03 +0200

iOS-Implementation of Short Message Function

The function of sending short messages is indispensable for an APP that needs channel expansion. However, when I first saw this demand, I was confused, because I had not met before, out of fear of the unknown, when I was assigned to do this task, I actually refused, but there is no way to let me be a soldier, can only be tough on the scalp. Aft ...

Posted by nadeem14375 on Tue, 04 Jun 2019 03:00:15 +0200