The basic syntax of find() method with projection is as follows
> db.COLLECTION_NAME.find({},{KEY:1});
If you want to show all documents without the age field then the command is as follows
db.people.find({},{age : 0});
If you want to show all documents the age field then the command is a...
In MongoDB, projection means selecting only the necessary data rather than selecting whole of the data of a document.
The basic syntax of find() method with projection is as follows
> db.COLLECTION_NAME.find({},{KEY:1});
If you want to to show all document without the age field then the comm...
Using sequence function you can easily describe a message that calls a list of other messages. It's useful when dealing with semantics of your messages.
Example 1: You are making a game engine, and you need to refresh the screen on every frame.
module Video exposing (..)
type Message = module Vid...
When using the .get() method whatever is in the entry widget will be converted into a string. For example, regardless of the type of input(It can be a number or sentence), the resulting outcome will be a string. If the user types 4 the output will be "4" as in a string. To get an int from ...
Creating an event listener in Forge is very similar to creating one in Bukket.
Creating the listener class requires a lot less. There's no interface to implement or other imports.
public class ListenerClass { } //perfectly valid event listener class
Registering it requires passing the instance ...
void C++
When used as a function return type, the void keyword specifies that the function does not return a value. When used for a function's parameter list, void specifies that the function takes no parameters. When used in the declaration of a pointer, void specifies that the pointer is ...
ArgumentCaptor will to receive the actual invocation arguments that has been passed to method.
ArgumentCaptor<Foo> captor = ArgumentCaptor.forClass(Foo.class);
verify(mockObj).doSomethind(captor.capture());
Foo invocationArg = captor.getValue();
//do any assertions on invocationArg
For ...
Using scanf
Scanf scans text read from standard input, storing successive space-separated values into successive arguments as determined by the format. It returns the number of items successfully scanned. If that is less than the number of arguments, err will report why. Newlines in the input mus...
# General syntax:
# grep(<pattern>, <character vector>)
mystring <- c('The number 5',
'The number 8',
'1 is the loneliest number',
'Company, 3 is',
'Git SSH tag is [email protected]',
'My personal site is w...
This configuration lets' you run your total spec files in two browser instances in parallel. It helps reduce the overall test execution time. Change the maxInstances based on your need.
Note: Make sure your tests are independent.
var config = {};
var timeout = 120000;
config.framework = 'jasmi...
In this example 2000 bytes will be transfered using DMA, Transmit Half Complete and Transmit Complete interrupts achieving the best performance.
The first half of the transmit buffer is loaded with new data by the CPU in the Transmit Half Complete interrupt callback while the second half of the buf...
Tkinter support .ppm files from PIL(Python Imaging Library), .JPG, .PNG and .GIF.
To import and image you first need to create a reference like so:
Image = PhotoImage(filename = [Your Image here])
Now, we can add this image to Button and Labels like so using the "img" callback:
Lbl ...
In an angular app everything goes around scope, if we could get an elements scope then it is easy to debug the angular app.
How to access the scope of element:
angular.element(myDomElement).scope();
e.g.
angular.element(document.getElementById('yourElementId')).scope() //accessing by ID
Gett...
To illustrate this, here is a function that has 3 different "wrong" behaviors
the parameter is completely stupid: we use a user-defined expression
the parameter has a typo: we use Oracle standard NO_DATA_FOUND error
another, but not handled case
Feel free to adapt it to your standa...
