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An example implementation of BubbleSort in C++: void bubbleSort(vector<int>numbers) { for(int i = numbers.size() - 1; i >= 0; i--) { for(int j = 1; j <= i; j++) { if(numbers[j-1] > numbers[j]) { swap(numbers[j-1],numbers(...

The BigInteger class has a constructor dedicated to generate random BigIntegers, given an instance of java.util.Random and an int that specifies how many bits will the BigInteger have. Its usage is quite simple - when you call the constructor BigInteger(int, Random) like this: BigInteger randomBigI...

By utilizing the pre_save we can determine if a save action on our database was about updating an existing object or creating a new one. In order to achieve this you can check the state of the model object: @receiver(pre_save, sender=User) def pre_save_user(sender, instance, **kwargs): ...

public class QuickSort { private static int Partition(int[] input, int low, int high) { var pivot = input[high]; var i = low - 1; for (var j = low; j <= high - 1; j++) { if (input[j] <= pivot) { i++; ...

An example of a constraint as expressed in the C standard is having two variables of the same name declared in a scope1), for example: void foo(int bar) { int var; double var; } This code breaches the constraint and must produce a diagnostic message at compile time. This is very usef...

The unary + and - operators are only usable on arithmetic types, therefore if for example one tries to use them on a struct the program will produce a diagnostic eg: struct foo { bool bar; }; void baz(void) { struct foo testStruct; -testStruct; /* This breaks the constraint so mu...

// initialize library $this->load->library('form_validation'); $this->form_validation->set_rules('username', 'Username', 'required|max_length[20]'); // Add validation rules for require and max $this->form_validation->set_rules('password', 'Password', 'required|matches[passw...

Different countries have different number formats and considering this we can have different formats using Locale of java. Using locale can help in formatting Locale locale = new Locale("en", "IN"); NumberFormat numberFormat = NumberFormat.getInstance(locale); using above fo...

Detailed instructions on getting microcontroller set up or installed.

Consider this example: private void button1_Click(object sender, EventArgs e) { label1.Text = RunTooLong(); } This method will freeze UI application until the RunTooLong will be completed. The application will be unresponsive. You can try run inner code asynchronously: private void butt...

Install Anaconda(PyQt5 is build-in), especially for windows user. Integrate QtDesigner and QtUIConvert in PyCharm(External Tools) Open PyCharm Settings > Tools > External Tools Create Tool(QtDesigner) - used to edit *.ui files Create Tool(PyUIConv) - used to convert *.ui to *.py ...

Carthage Setup Download the latest version of Carthage from the given link Download Link Down in the Download section download the Carthage.pkg file. Once the download is complete install it by double clinking on the download pkg file. To check for successful download run the following command i...

DECLARE @ID AS INT; SET @ID = (SELECT MIN(ID) from TABLE); WHILE @ID IS NOT NULL BEGIN PRINT @ID; SET @ID = (SELECT MIN(ID) FROM TABLE WHERE ID > @ID); END

Catalan numbers algorithm is Dynamic Programming algorithm. In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively-defined objects. The Catalan numbers on nonnegative integers n are a set of numbers t...

To retrieve information about dplyr package and its functions' descriptions: help(package = "dplyr") No need to load the package first.

To see built-in data sets from package dplyr data(package = "dplyr") No need to load the package first.

If you want to create a custom validation rule, you can do so for instance in the boot method of a service provider, via the Validator facade. <?php namespace App\Providers; use Illuminate\Support\ServiceProvider; use Validator; class AppServiceProvider extends ServiceProvider { ...

You can COPY table and paste it into a file. postgres=# select * from my_table; c1 | c2 | c3 ----+----+---- 1 | 1 | 1 2 | 2 | 2 3 | 3 | 3 4 | 4 | 4 5 | 5 | (5 rows) postgres=# copy my_table to '/home/postgres/my_table.txt' using delimiters '|' with null as 'null_s...

Suppose, that we have three users : The Administrator of the database > admin The application with a full access for her data > read_write The read only access > read_only With below queries, you can set access privileges on objects created in the future in specified schema. ALTER ...

Schema changes: You will need to define a new field type in your solr schema file and then you can create fields of that type. Example schema snippet: <!-- Source: solr/example/.../conf/schema.xml --> <?xml version="1.0" encoding="UTF-8" ?> <schema name="a...