Applet calculator

This calculator supports the calculation after clicking "=" so as to calculate the later operation with high operator such as 2 + 3 * 4.   Interface construction For function buttons, because the styles are relatively uniform, wx:for loops are used for layout, and view control is used for each key.   wxml file ...

Posted on Fri, 13 Dec 2019 13:11:06 -0800 by JackJack

The branch structure of python

Use of if statement In Python, if, elif, and else keywords can be used to construct a branch structure. Keywords are words with special meanings. For example, if and else are keywords specially used to construct branch structures. Obviously, you can't use them as variable names (in fact, they can't be used as other identifiers). He ...

Posted on Sat, 07 Dec 2019 17:44:07 -0800 by cheatboy00

The way of learning of Vue Part 10: the realization of simple calculator

The first nine chapters explain some basic knowledge of vue, that is to say: apply what we have learned. Today we will use the first nine chapters to simulate and realize the simple function of calculator. The value of the project is not high, and it is purely to deepen our grasp of what we have learned. Pre school preparation: You need to mast ...

Posted on Fri, 06 Dec 2019 06:24:23 -0800 by selenin

content attribute of css

The content attribute is generally used in:: before,:: after pseudo elements to render the content of pseudo elements. Usually, we use the most value of content attribute to give a pure character. In fact, there are many values to choose from. 1. Insert plain characters <style> *{margin: 0;padding: 0;box-sizing: border-box;} li{l ...

Posted on Tue, 03 Dec 2019 05:45:35 -0800 by ttmt

Using dll built by C code in LabVIEW

  First, let's take a calculator program as an example First, open VS2017 (any version VS can), create a new project, and select the. net class library file Then the inner part of the class is constructed, and two common classes are designed, one is responsible for data processing and the other is the entity model as the r ...

Posted on Sat, 30 Nov 2019 16:39:27 -0800 by me102

Vi. write a simulated bc calculator based on Flex/Bison / symbol table

[implement most functions except function definition and if while for statement] Refer to the bc command manual (you can see it after executing man bc), write a high-level calculator imitating the syntax of bc, which can realize most of the functions of the whole bc. Functions: Implement the following symbols and their priorities ...

Posted on Wed, 27 Nov 2019 09:33:49 -0800 by trixx

Second, react makes a simple calculator

Readers: familiar with javascript/nodejs, react introduction, front-end framework selection and nodejs interested users Background overview: React, vue and Angular are three popular javascript frameworks in the front-end. I am not a professional front-end, pseudo full stack. There are two main reasons for choosing react: first, there is almost ...

Posted on Sat, 23 Nov 2019 12:04:29 -0800 by dmeade

24. Interpreter

Interpreter Pattern: Define the grammar of a language and create an interpreter to interpret sentences in that language, where "language" refers to code that uses prescribed formats and grammars. The Interpreter pattern is a kind of behavioral pattern. The Interpreter pattern consists of the following roles: Abstract Expression: An Ab ...

Posted on Thu, 10 Oct 2019 02:59:13 -0700 by gerry123

junit unit testing

Use of junit: white box testing Steps: 1. Define a test class (test case) * Test Class Name: The Class Name under Test, e.g.Calculator * Package name: xxx.xxx.xx.test 2. Define test methods: they can run independently * Method Name: Method Name of test Test test, e.g. testAdd() * Return value: ...

Posted on Sun, 06 Oct 2019 12:53:00 -0700 by Bluelove

30 Python Practical Codes for Instant Use

Python is one of the most popular languages. It is widely used in data science, machine learning, web development, scripting and automation. Its simplicity and ease of use make it so popular. In this article, we will introduce 30 short code snippets that you can understand and learn in 30 seconds or less. 1. Check duplicate elements The followi ...

Posted on Sat, 21 Sep 2019 03:46:55 -0700 by BVis