UITableView to modify the font size of its own retrieval column

� UITableView can't be modified by using its own retrieval column. How to modify it? Get UITableViewIndex before HeaderView will display -(void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section { for (UIView *view in [tableView subviews]) { if ([view isKindOfClass:[NSClassFromStr ...

Posted by steveh62 on Sat, 23 May 2020 08:07:25 -0700

C language simple greedy snake learning

Just finished learning C language, I want to write a small project to consolidate the basic knowledge and lay a solid foundation for the next step of learning. Then I began to look for projects that can be done in the major websites and blogs, and finally I chose the snake eating game, most of which are called library functions, without the use ...

Posted by loki1664 on Wed, 20 May 2020 08:33:06 -0700

Static display of common cathode digital tube

Schematic diagram of nixie tube circuit   Hardware implementation principle 1. Circuit analysis Firstly, the data is latched by M74HC573MIR latch. Firstly, the segment code is output by Y7C enable terminal, and the bit code is output by Y6C enable terminal. The resistance here plays a role of current limiting.   2. Digital tube analysis Common ...

Posted by phatpappy on Tue, 19 May 2020 08:19:59 -0700

200 lines of Java code for calculator program

I found a calculator program written in college, and a graphical interface, which can graphically display the expression syntax tree, ha ha;) There are only 200 lines of Java code, which can not only calculate addition, subtraction, multiplication and division, but also match parentheses~ Code comments: From simple interface color matching to ...

Posted by aznkidzx on Sun, 17 May 2020 09:14:50 -0700

The realization of moving average filter in hand-held teaching series

[introduction]: in the previous article about IIR design, some friends are still reading it. Although I don't know how the officials feel, I think there is always a reward to read, so I decided to continue this series. This article talks about average filter, which is very easy at first glance. But I don't think some of the key points are clear ...

Posted by embtech on Sat, 16 May 2020 23:08:17 -0700

C language reconstruction function encapsulation of airplane game (advanced version)

code refactoring This can provide a simplified game framework and realize code reuse #include<stdio.h> #include<stdlib.h> #include<conio.h> int x, y; int high, width; void startup() { high = 20; width = 30; x = high / 2; y = width / 2; } void show() { system("cls"); int i, j; for(i = 0; i < high; i++) //Show ...

Posted by ali_p on Wed, 06 May 2020 07:57:43 -0700

The skill of quickly locating header file in linux Programming powerful grep command

This skill comes from my actual development: This function is used to convert ip address into network byte order. Its prototype is in addr INET addr (const char * CP); The return value is an in ﹣ addr ﹣ T type. Obviously, this is not a standard data type of c language. If you want to find out what type it is, you must find the header file. ...

Posted by alsouno on Tue, 05 May 2020 01:02:17 -0700

warshall judge whether an undirected graph is a tree

Determine whether a graph is a tree problem Given an undirected graph, we can judge whether the graph is a tree. input The input has several test samples. The first line is the number of test samples, followed by several test samples. The first line of each test sample is the node number n, and the nodes use 1,2 , n number. The second line is t ...

Posted by jasonhardwick on Mon, 04 May 2020 11:39:18 -0700

Instructions for Python [map, reduce, filter] built-in functions

notes preceding the text of a book or following the title of an article Introduce the methods of map, reduce, and filter built-in functions in Python 1: map map(...) map(function, sequence[, sequence, ...]) -> list Execute function(item) for item in sequence, and output the result as list. >>> map(str, range(5)) #st ...

Posted by karassik on Thu, 30 Apr 2020 08:22:15 -0700

The number of times in the array of sword finger offer exceeds half of the array length

Title:There is a number in the array that appears more than half the length of the array. Please find this number. For example, enter an array of length 9 {1,2,3,2,2,2,5,4,2}. Since the number 2 appears five times in the array, more than half the length of the array, output 2. Output 0 if it does not exist.  Resolution:Seeing this problem, ...

Posted by kender on Sun, 26 Apr 2020 09:07:32 -0700