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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to print application base apk path in android?
This example demonstrate about How to print application base apk path in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken text view to show the current application base apk path .Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; import java.security.Security; import java.util.Locale; public class MainActivity extends AppCompatActivity { ...
Read MoreWhat do column flags mean in MySQL Workbench?
In MySQL Workbench, column flags can be used with a column to maintain integrity. The column flags are as follows −PK − Primary KeyNN − NOT NULLBIN − BinaryUN − UnsignedUQ − UniqueZF − Zero FilledG − Generate ColumnAI − Auto IncrementLet us learn about them one by one −PKThis stands for the primary key. It can be used to make the column as a primary key.NNIt is for NOT NULL. Used to enforce the column that it will not insert a NULL value.BINThis stands for Binary. This can be used to store data as a binary string.UNIt is for ...
Read MorePage Rank Algorithm and Implementation using Python
The PageRank algorithm is applicable in web pages. Web page is a directed graph, we know that the two components of Directed graphsare -nodes and connections. The pages are nodes and hyperlinks are the connections, the connection between two nodes.We can find out the importance of each page by the PageRank and it is accurate. The value of the PageRank is the probability will be between 0 and 1.The PageRank value of individual node in a graph depends on the PageRank value of all the nodes which connect to it and those nodes are cyclically connected to the nodes whose ...
Read MoreDoes MySQL foreign_key_checks affect the entire database?
The foreign_key_checks are session based. Now, we can say that they are for scope i.e. local or global. Here is an example demo of local or global. Both are scopes and we can set this for session.Let us set the scope −mysql> set foreign_key_checks = 0; Query OK, 0 rows affected (0.00 sec) mysql> set global foreign_key_checks = 0; Query OK, 0 rows affected (0.05 sec)The foreign_key_checks variables are server system variables. Here are some more details −PropertyValueSystem Variableforeign_key_checksScopeGlobal, SessionDynamicYesTypeBooleanDefault ValueONSetting foreign_key_checks to 0It affects data definition statements: DROP SCHEMA drops a schema even if it contains tables that have ...
Read MoreDifferent Methods to find Prime Number in Python
First we need to know what a prime number is.A prime number always a positive integer number and divisible by exactly 2 integers (1 and the number itself), 1 is not a prime number.Now we shall discuss some methods to find Prime Number.Method1Using For loopsExampledef primemethod1(number): # Initialize a list my_primes = [] for pr in range(2, number): isPrime = True for i in range(2, pr): if pr % i == 0: isPrime = False if isPrime: my_primes.append(pr) print(my_primes) primemethod1(50)Output[2, 3, 5, 7, 11, ...
Read MoreIs it possible to use UPDATE query with LIMIT in MySQL?
Yes, it is possible to use UPDATE query with LIMIT in MySQL. Let us see how.For our example, we will first create a table. The CREATE command is used to create a table.mysql>CREATE table tblUpdateLimit -> ( -> id int, -> name varchar(100) -> ); Query OK, 0 rows affected (0.53 sec)Records are inserted with the help of INSERT command.mysql>INSERT into tblUpdateLimit values(1, 'John'); Query OK, 1 row affected (0.54 sec) mysql>INSERT into tblUpdateLimit values(2, 'Carol'); Query OK, 1 row affected (0.12 sec) mysql>INSERT into tblUpdateLimit values(3, 'Smith'); Query OK, 1 row affected (0.10 sec) mysql>INSERT into ...
Read MoreHow to check similarity between two strings in MySQL?
Similarity between two strings can be checked with the help of ‘strcmp()’ function. Here are the conditions.If both strings are equal, then it returns 0.If first string is less than the second string, it returns -1.If first string is greater than the second string, it returns 1.Here is an example.Case 1 − If both strings are equal.The following is the query.mysql > SELECT STRCMP("demo", "demo");The following is the output of the above query.+------------------------+ | STRCMP("demo", "demo") | +------------------------+ | 0 ...
Read MoreHow to escape single quotes in MySQL?
We can escape single quotes with the help of the SELECT statement. For instance, when single quotes are encountered in a name, eg. “Carol’s”.Let us see the syntax.SELECT ‘SomeValue’;Here is an example that display how to include text with single quotes.mysql> SELECT 'Carol's Taylor.'; The following is the output.+-------------------+ | Carol's Taylor | +-------------------+ | Carol's Taylor | +-------------------+ 1 row in set (0.00 sec)
Read MoreWhich one is better in MySQL - NULL or empty string?
The choice depends upon the database. In ORACLE database, an empty string is converted to NULL.In MySQL, the usage of an empty string is better as compared to NULL. It is easy to check for an empty string with some boundary conditions, while this cannot be done with NULL. To find NULL, we need to add an extra condition i.e. ‘IS NULL’We can check that the length of NULL is 0 while length of empty string is 1.To check the length of NULL.mysql>SELECT count(NULL);The following is the output of the above query.+-----------------+ | count(NULL) | +-----------------+ ...
Read MoreHow will drones help improve the security?
Proper security involves all-around surveillance or observation of people, their behavior and actions, immovable property like land and building as well as movable property stationed there. Surveillance is generally conducted with the help of methods that either have limited mobility or are stationary like, CCTV cameras, GPS tracking dependent on satellite connectivity and not helpful in close observation, stake-outs, which are time-consuming, data-based profiling and biometrics and some other methods.Drone Has Turned the TableAll these methods have their own level of advantages and limitations but when it comes to drone technology, the efficiency, and effectiveness of any security operation increase ...
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