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
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
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
Posted on Thu, 06 Jun 2019 18:19:31 -0700 by stormx
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
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
1. Create a Date object
var time1=new Date()
Method 1: No parameters are specified
var time1=new Date();
Method 2: The parameter is a date string
var time2=new Date("2017/8/8 11:12");
var time3=new Date("2016/03/20 11:12");
Method 3: Th ...
Posted on Thu, 06 Jun 2019 13:30:25 -0700 by vince251
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
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
<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
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
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
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.
Posted on Tue, 04 Jun 2019 16:11:43 -0700 by HairyArse