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Articles by Jennifer Nicholas
Page 4 of 21
Applications of 8212 in mode 1
Let's discuss the Following two applicationsLow order address latchOutput port which is interrupting.Intel 8212 as low-order address latch − Here the low-order address lines and data lines are multiplexed and are available as AD7-0. It is convenient to have the address as many times and the separation of data on the different lines. Let's for an example, if we connect a chip like 2716 in an 8085-based system, the 2716 needs bit address of11 bits in its address pins, and here is separate 8 pins kept for data. Now connecting the AD7-0 pins of 8085 to the LS 8 address ...
Read MoreHow To Change UIView's Border Color And Thickness in Cocoa Touch?
In this article we'll learn how to change a View's border color and thickness.This can be done in two ways as mentioned below.Method 1 − Writing the codeLet's suppose we have a view name backView, then to add a border color and thickness we can writebackView.layer.borderWidth = 5 // Or any integer valuebackView.layer.bordercolor = colorLiteral(red: 0.09019608051, green: 0, blue: 0.3019607961, alpha: 1) this code will add a border of 5 width and a dark blue color. Below is the output is produces.Method 2 − Creating an extension of UIView with designable and inspectable@IBDesignable class DesignableView: UIView { } extension UIView ...
Read MoreHow to download a video using a URL and save it in an photo album using Swift?
To download a video from a URL in swift we need to perform a few steps while keeping a few things in mind.Points to be noted here are, We’ll be making use of internet to download video, hence we need to allow permissions for App transport security in our Info.plistWe’ll need to save the downloaded video to Photos app, hence photos permission is required.Video should always be downloaded in background as it may prevent us from using the app if downloaded on foreground.Now, we’ll use the below code to save a video from a random link in our Device. You’ll ...
Read More8085 code to convert binary number to ASCII code
Now let us see a program of Intel 8085 Microprocessor. This program will convert binary or hexadecimal number to ASCII values.Problem StatementWrite 8085 Assembly language program to convert binary or Hexadecimal characters to ASCII values. DiscussionWe know that the ASCII of number 00H is 30H (48D), and ASCII of 09H is39H (57D). So all other numbers are in the range 30H to 39H. TheASCII value of 0AH is 41H (65D) and ASCII of 0FH is 46H (70D), so all other alphabets (B, C, D, E, F) are in the range 41H to 46H.Here we are providing hexadecimal digit at memory location ...
Read MoreHow to resolve the ERROR 1115 (42000): Unknown character set: 'utf8mb4'?
You will get this type of error when your MySQL version is below 5.5.3. This is because “utf8mb4” introduced in MySQL version 5.5.3.Firstly, you need to check the current version. If its less than 5.5.3, then you need to upgrade to solve the above error.Check the current version −mysql> select version();Here, our MySQL version is over 5.5.3 −+-----------+ | version() | +-----------+ | 8.0.12 | +-----------+ 1 row in set (0.00 sec)Now the same query that gave an error 1115, will display correct result. To check all character set in MySQL now, use the below query.mysql> show character set;The ...
Read MoreHow to find the highest number in a column?
You can find the highest number in a column with the help of aggregate function MAX. The syntax is as follows −select max(yourColumnName) as anyVariableName from yourTableName;To understand the above concept, let us create a table with an int column. The following is the query to create a table.mysql> create table HighestNumberDemo −> ( −> BigNumber int −> ); Query OK, 0 rows affected (0.87 sec)Now insert some values in the table. The query to insert records are as follows −mysql> insert into HighestNumberDemo values(1234); Query OK, 1 row affected (0.43 sec) mysql> insert ...
Read MoreCreate a new table with the properties of an old table and without duplicates using MySQL LIKE Operator?
To achieve this with LIKE operator, the following is the syntax −CREATE TABLE yourTableName2 LIKE yourTableName1;To understand the syntax, let us create a table and insert some records into it. The following is the query to create a table −mysql> create table Employee −> ( −> EmployeeId int −> , −> EmployeeName varchar(100) −> ); Query OK, 0 rows affected (0.54 sec)Inserting records into the table with the help of insert command. The query is as follows −mysql> insert into Employee values(1, 'Carol'); Query OK, 1 row affected (0.18 sec) mysql> insert into Employee values(2, 'John'); ...
Read MoreHow to add Exception Breakpoint in Xcode?
Sometimes while writing an iOS application or any other application we need to test multiple cases and debug the application of any known and unknown bugs. There are certain places in the code where we want our app to stop so that we can know the values of certain variables at the point and fix that bug. Before we learn how to add a break point, first let’s seeWhat’s a break point?A break point is a place in our code where the app pauses on a certain event. A break point may be added manually in xcode or may be ...
Read MoreHow to detect the screen size of iPhone 5?
Detecting screen size of an apple device is an easy and simple task. The UIKIT module of iOS SDK provides many functions and classes that deal with user interface, screen sizes and many other UI elements.One of them is UIScreen which deals with the device screen.UIScreen.main provides the current main screen of the device in use, which further has methods that return other features and properties of the current screen.To find if the current screen is an iPhone 5 or not, we’ll first have to find the current size of the screen and compare with a value. The height of ...
Read MoreWhat are all the custom URL schemes supported by the Facebook iPhone app?
A url Scheme is a way of iOS to open some third party applications from within a app. Some of the URL schemes that are supported by facebook to open different modules of facebook app from within some other app are mentioned below.1. To open facebook profile: fb://profile 2. To open request list: fb://requests 3. To open friends list : fb://friends 4. To open notes: fb://notes 5. To open the list of notifications : fb://notifications 6. To open albums: fb://albums 7. To open feeds/ home : fb://feed 8. To open events : fb://events 9. To open a page with id: ...
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