Learning Kotlin-20170801 Together from Zero

The previous series of articles (please learn in sequence): Let's learn Kotlin-20170728 from Zero. http://blog.csdn.net/clandellen/article/details/76283527 Let's learn Kotlin-20170730 from zero. http://blog.csdn.net/clandellen/article/details/76369434 Learning Kotlin-20170801 Together from Zero 0. Official API Links: http://pan.baidu.co ...

Posted on Sat, 08 Jun 2019 12:15:59 -0700 by gargoylemusic

Learning Note ch05(6) of Data Analysis with Python

Chapter 5 Introduction to pandas pandas is based on NumPy, which makes NumPy-centric applications simpler. Introduction of data structure of pandas Two main data structures: Series and DataFrame Series It consists of a set of data and a set of related data labels (i.e. indexes). from pandas import Series,DataFrame import numpy as np impo ...

Posted on Thu, 06 Jun 2019 18:19:31 -0700 by stormx

How to Implement a DOM-based Template Engine

Topic Map: Vincent Guth Note: All codes in this article can be used in my personal project. colon It's found here, and this article is synchronized. KNOWLEDGE COLUMN Maybe you've already realized the convenience of Vue, and I believe that part of the reason is because of its DOM-based template rendering engine with concise grammar. This articl ...

Posted on Thu, 06 Jun 2019 16:06:50 -0700 by datona

Object Serialization

There may be data that needs to be saved when the program runs. For basic data types such as int, float, char, etc., it can be simply saved to the file. When the program starts next time, it can read the data initialization program in the file. But for complex object types, if they need to be permanently saved, using the above method will be m ...

Posted on Thu, 06 Jun 2019 13:38:28 -0700 by mxl

Date object and Math object in javascript

1.Date object 1. Create a Date object var time1=new Date() Method 1: No parameters are specified var time1=new Date(); alert(time1.toLocaleString( )); Method 2: The parameter is a date string var time2=new Date("2017/8/8 11:12"); alert(time2.toLocaleString( )); var time3=new Date("2016/03/20 11:12"); alert(time3.toLocaleString( )); Method 3: Th ...

Posted on Thu, 06 Jun 2019 13:30:25 -0700 by vince251

Hand-in-hand teaching you to use the healthKit framework to invoke step-counting data

HealthKit Recently, there is a new demand for the client to exchange data for red envelopes. Originally, we planned to use the old gravity sensor plus gyroscope data to determine walking status and then make our own pedometer. Then the leader joked: HealthKit is not used. Are you more considerate than Apple officials? So go to see the use of ...

Posted on Wed, 05 Jun 2019 15:41:29 -0700 by koldstar

CSS pseudo-Class selector: before,: after use: insert characters, insert pictures, insert project number

Before: Pseudo-element selector is used to insert some content before an element Pseudo-class selector: before uses content attributes to insert characters, attributes to insert pictures <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta charset="u ...

Posted on Wed, 05 Jun 2019 14:43:23 -0700 by touchingvirus

Detailed Explanation of Range Objects in HTML 5

First: The concept of Range objects Range objects represent a continuous section of the page, through which the content of any section of the page can be obtained or modified. Range can also be used to copy and move elements in any area of the page. In the document document document of Js, there is a method to create a Range object. The c ...

Posted on Wed, 05 Jun 2019 13:20:40 -0700 by kujtim

Curitization of Functions for JavaScript Themes

The thirteenth article in the JavaScript Theme Series explains function coritization and how to implement a curry function Definition Currying is defined in Wikipedia as: In mathematics and computer science, currying is the technique of translating the evaluation of a function that takes multiple arguments (or a tuple of arguments) into evaluat ...

Posted on Wed, 05 Jun 2019 11:08:18 -0700 by kof20012

Android Custom View Foundation 08 - Details of 7 Ways to Achieve Sliding

What are the ways to implement sliding in android? In fact, sliding a View is essentially moving a View to change its current position. To realize the sliding of View, it is necessary to monitor the events touched by users and obtain the coordinate values of the events, so that the animation can change the position and achieve sliding. and ...

Posted on Tue, 04 Jun 2019 16:11:43 -0700 by HairyArse