TreeMap Set Characteristic and Sorting Principle

TreeMap features (similar to TreeSet): 1. Unordered, not allowed to repeat (disordered refers to the order of elements is not consistent with the order of additions) 2.TreeMap collections sort keys by default, so keys must be one of natural and customized sorts 3. The underlying data structure is a binary tree Two sorts of usage (r ...

Posted on Sun, 07 Jul 2019 14:50:38 -0700 by asurfaceinbetween

How to Deeply Use scss to Develop a Simple Page

This article will take a closer look at some of the scss syntax from the perspective of general development.Start one step at a time~~ Step 1: Map and Truth First get a marked psd file from Design Sister.(Of course, it is very common that there is no such marker. We can measure ourselves with the ps ruler.)Here's a tool to recommend: Avocode au ...

Posted on Sun, 07 Jul 2019 10:49:13 -0700 by shanx24

Some cluttered knowledge points (1)

Some cluttered knowledge points (1) Some cluttered points of knowledge Configuring environment variables under Android is similar to cmd commands on computers ListView Linear Layout layout Android uses pictures Common package names Company Tool class time-consuming operation thread Json Data Parsing Mobile Access to Server Content on Compu ...

Posted on Fri, 05 Jul 2019 10:33:38 -0700 by bufke

android Custom View Simulated Address Book Side Bar Sliding to Achieve A-Z Letter Retrieval

Our mobile phone address book generally has this effect, as follows: OK, we've seen a lot of this effect, basically all of it. Android Cell phone directories have this effect. Let's see how this effect can be achieved today. I. Overview 1. Page Function Analysis Overall, there is a ListView on the left and a custom View on ...

Posted on Wed, 03 Jul 2019 14:16:36 -0700 by tejama

Diffutils create a different recyclerview

** Reprinted on **: http://blog.csdn.net/sw950729/article/details/70052693 Sketch DiffUtil is a new class in the recyclerview support library v7 24.2.0. According to the official Google documentation, DiffUtil is used to compare two data lists and calculate a series of operations to convert old data tables into new data tables.Th ...

Posted on Wed, 03 Jul 2019 10:09:26 -0700 by Fastback_68

Use localResizeIMG4 to compress pictures on the mobile side

Mobile h5 development can't avoid uploading pictures. Usually we use the control input that comes with html or the WeChat upload API.However, the WeChat upload API is not available anywhere, and using the control input that comes with html to upload images is unavoidable due to the large size and unstable upload.localResizeIMG4 was created fo ...

Posted on Sat, 29 Jun 2019 10:40:15 -0700 by satant

Python Read-Write Excel Example Application

Read for reading: Python uses xlrd and xlwt to read and write simple uses of Excel Preface Earlier, we learned two libraries xlrd and xlwt for simple Python operation Excel. Today, we will take a practical case to enhance the actual combat function. Case Background Our marketing students want to analyze the active data of users before and ...

Posted on Thu, 27 Jun 2019 16:41:21 -0700 by hoolahoops

Best Project Practice for Vue.js Initiation - Personal Blog Full Stack Application from Zero to Online

Vue.js+LeanCloud Light Blog Application Project Profile GitHub address This is a light blog application implemented entirely by the Vue family bucket. Vuex is fully used to manage all state data and optimize the overall structure. The whole stack application developed by Node.js is used in the back end. The iteration version of GitHub is conti ...

Posted on Thu, 27 Jun 2019 16:27:47 -0700 by jakobdoppler

Summary of iOS BLE Module Development

This article defaults that the reader has a basic understanding of Bluetooth development and uses Baby Bluetooth interactively with peripherals. The main points summarized are as follows: 1. The steps of iOS Bluetooth connecting with peripherals. 2. Peripheral filtering, services, features. 3. Single-mode and dual-mode Bluetooth. 4. UUID o ...

Posted on Thu, 27 Jun 2019 14:25:07 -0700 by markyoung1984

Message Receipt Solution for XMPP Protocol

Find a way in distress The concept of message receipt is known at the beginning of instant messaging. The purpose is to solve the problem that the message is not delivered to the other party for various reasons and provide a safeguard mechanism. The main reasons for this problem are network instability, server or client anomalies, which lead to ...

Posted on Wed, 26 Jun 2019 11:30:06 -0700 by show8bbs