extern crate regex;
use regex::Regex;
fn main() {
let rg = Regex::new(r"was (\d+)").unwrap();
// Regex::captures returns Option<Captures>,
// first element is the full match and others
// are capture groups
match rg.captures("The year was 2016")...
Using the NotificationCenter of iOS, which can be very powerful, you are able to intercept certain app-wide events:
NotificationCenter.default.addObserver(
self,
selector: #selector(ViewController.do(_:)),
name: NSNotification.Name.UIApplicationDidBecomeActive,
o...
Empty string
Empty string is not null but has zero length:
string emptyString = "";
// an empty string is not null...
assert(emptyString !is null);
// ... but it has zero lenght
assert(emptyString.length == 0);
Null string
string nullString = null;
a null string is null (De ...
Depth-first search is an algorithm for traversing or searching tree or graph data structures. One starts at the root and explores as far as possible along each branch before backtracking. A version of depth-first search was investigated in the 19th century French mathematician Charles Pierre Trémaux...
Dictionaries are great for managing information where multiple entries occur, but you are only concerned with a single value for each set of entries — the first or last value, the mininmum or maximum value, an average, a sum etc.
Consider a workbook that holds a log of user activity, with a script ...
Private Sub Get_Last_Used_Row_Index()
Dim wS As Worksheet
Set wS = ThisWorkbook.Sheets("Sheet1")
Debug.Print LastRow_1(wS)
Debug.Print LastRow_0(wS)
End Sub
You can choose between 2 options,
regarding if you want to know if there is no data in the worksheet :...
In this example, we will look at a method for returning the last non-empty column in a row.
This method will work regardless of empty regions within the data set.
However caution should be used if merged cells are involved, as the End method will be "stopped" against a merged region, ret...
class MyResourceAdapter
implements javax.resource.spi.ResourceAdapter {
public void start(BootstrapContext ctx){..}
public void stop(){..}
public void endpointActivation (MessageEndpoingFactory mf, ActivationSpec a){..}
public void endpointDeactivation (MessageEndpoingFact...
You can customize parsing rules using different options in WITH clause:
BULK INSERT People
FROM 'f:\orders\people.csv'
WITH ( CODEPAGE = '65001',
FIELDTERMINATOR =',',
ROWTERMINATOR ='\n'
);
In this example, CODEPAGE specifies that a source file in UTF-8 f...
There are many reasons a write operation may fail. A frequent one is because your security rules reject the operation, for example because you're not authenticated (by default a database can only be accessed by an authenticated user).
You can see these security rule violations in the console output...
With the 2.x versions of typescript, typings are now available from the npm @types repository. These are automatically resolved by the typescript compiler and are much simpler to use.
To install a type definition you simply install it as a dev dependency in your projects package.json
e.g.
npm i -...
var x = 5;
var str = "if (x == 5) {console.log('z is 42'); z = 42;} else z = 0; ";
console.log("z is ", eval(str));
The use of eval is strongly discouraged. See the Remarks section for details.
An easy way to get an input from a user is by using the prompt() method.
Syntax
prompt(text, [default]);
text: The text displayed in the prompt box.
default: A default value for the input field (optional).
Examples
var age = prompt("How old are you?");
console.log(age); // Pri...
Convert the interface of a class into another interface clients expect. Adapter (or Wrapper) lets classes work together that couldn't otherwise because of incompatible interfaces. Adapter pattern's motivation is that we can reuse existing software if we can modify the interface.
Adapter pattern...
Create a new ASP.Net Project:
Select the empty template:
Add two new folders: App and Scripts in the root folder:
Add npm configuration file in the root folder:
{
"version": "1.0.0",
"name": "phaser.js.environment.setup",
"priva...
