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There is a signal WINCH ( WINdowCHange), which is fired when one resizes a terminal window. declare -x rows cols update_size(){ rows=$(tput lines) # get actual lines of term cols=$(tput cols) # get actual columns of term echo DEBUG terminal window has no $rows lines and is $cols chara...

Using a pipe makes the output of a command be the input of the next one. ls -1 | grep -c ".conf" In this case the ouput of the ls command is used as the input of the grep command. The result will be the number of files that include ".conf" in their name. This can be used to ...

MainActivity.java: public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } } activity_main.xml: <?xml version="1...

tf.exe get /all /recursive /force /overwrite $/ Gets all files and directories, and will replace any files that are not currently checked out in the workspace (including files that have been edited).

Union operation combines the results of two or more queries into a single result set that includes all the rows that belong to all queries in the union and will ignore any duplicates that exist. Union all also does the same thing but include even the duplicate values. The concept of union operation ...

This will get all the orders for all customers: SELECT c.CustomerName, o.OrderID FROM Customers AS c INNER JOIN Orders AS o ON c.CustomerID = o.CustomerID ORDER BY c.CustomerName, o.OrderID; This will count the number of orders for each customer: SELECT c.CustomerName, C...

Warning for...in is intended for iterating over object keys, not array indexes. Using it to loop through an array is generally discouraged. It also includes properties from the prototype, so it may be necessary to check if the key is within the object using hasOwnProperty. If any attributes in th...

Detailed instructions on getting ssrs-2008-r2 set up or installed.

<svg width="600px" height="600px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <polyline points="10,10,50,40,80,30,120,90,130,10,180,50,250,100,300,10" fill="none" stroke="red" s...

<svg width="400px" height="400px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <line x1="10" y1="10" x2="300" y2="10" stroke="red" stroke-width="10" str...

<svg width="600px" height="400px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <line x1="10" y1="20" x2="300" y2="20" stroke="red" stroke-width="20"...

SVG Patterns behave significantly differently than CSS background images when filling equivalent shapes. This can lead to significant surprises for new-comers to SVG. Below are examples of a pattern defined in all possible combinations of patternUnits and patternContentUnits - showing how these sett...

<svg width="800px" height="800px"> <defs> <pattern id="pattern1" x="0" y="0" width="0.2" height="0.2" > <circle cx="10" cy="10" r="10" fill="blue" /> <...

Detailed instructions on getting virtualbox set up or installed.

To add a language to Sublime Text, you use Package Control. You can do this by pasting the correct Python code (available on the Package Control site linked above), or by downloading the .sublime-package file (also available for download on the site). Once you set up Package Control, restart Sublime...

element.style only reads CSS properties set inline, as an element attribute. However, styles are often set in an external stylesheet. The actual style of an element can be accessed with window.getComputedStyle(element). This function returns an object containing the actual computed value of all the ...

Scoped enumerations: ... enum class Status; // Forward declaration Status doWork(); // Use the forward declaration ... enum class Status { Invalid, Success, Fail }; Status doWork() // Full declaration required for implementation { return Status::Success; } Unscoped enumerations:...

Detailed instructions on getting oauth-2.0 set up or installed.

Input can also be read from files. Files can be opened using the built-in function open. Using a with <command> as <name> syntax (called a 'Context Manager') makes using open and getting a handle for the file super easy: with open('somefile.txt', 'r') as fileobj: # write code here ...

For live demo click.. App index ts import {bootstrap} from '@angular/platform-browser-dynamic'; import {MyForm} from './my-form.component.ts'; bootstrap(MyForm); Custom validator import {Control} from @'angular/common'; export class CustomValidators { static emailFormat(control: Cont...