Aggregating with dplyr is easy! You can use the group_by() and the summarize() functions for this. Some examples are given below.
CODE:
# Aggregating with dplyr
library(dplyr)
df = data.frame(group=c("Group 1","Group 1","Group 2","Group 2","Group 2&...
Use .outerHTML to get the HTML
Here is a code sample to get the entire HTML of the website
private async void GetHTMLAsync()
{
var siteHtML = await webView.InvokeScriptAsync("eval", new string[] { "document.documentElement.outerHTML;" });
}
Use .innerText to set the value
Here is a code sample to enter text in Search Box on Bing website
private async void EnterTextAsync(string enterText)
{
var functionString = string.Format(@"document.getElementsByClassName('b_searchbox')[0].innerText = '{0}';", enterText);
await...
var myVariable = "This is a variable!";
This is an example of defining variables. This variable is called a "string" because it has ASCII characters (A-Z, 0-9, !@#$, etc.)
var number1 = 5;
number1 = 3;
Here, we defined a number called "number1" which was equal to 5. However, on the second line, we changed the value to 3. To show the value of a variable, we log it to the console or use window.alert():
console.log(number1); // 3
window.alert(number1); //...
Let's first brush up with what are the
Instance Variables: They behave more like properties for an object. They are initialized on an object creation.
Instance variables are accessible through instance methods. Per Object has per instance variables. Instance Variables are not shared between object...
DOSKEY macros don't work in a batch script. However, we can use a little workaround.
set DOSKEYMacro=echo Hello World
%DOSKEYMacro%
This script can simulate the macro function. One can also use ampersands(&) to join commands, like $T in DOSKEY.
If you want a relatively large "macro&qu...
A pointer to a concrete data type, converted to void *, can be used to pass values to and return results from the thread function.
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
struct thread_args
{
int a;
double b;
};
struct thread_result
{
...
Rhas a vast collection of built-in datasets. Usually, they are used for teaching purposes to create quick and easily reproducible examples. There is a nice web-page listing the built-in datasets:
https://vincentarelbundock.github.io/Rdatasets/datasets.html
Example
Swiss Fertility and Socioecono...
There are packages that include data or are created specifically to disseminate datasets. When such a package is loaded (library(pkg)), the attached datasets become available either as R objects; or they need to be called with the data() function.
Gapminder
A nice dataset on the development of c...
For a convenient way to iterate through an arrayBuffer, you can create a simple iterator that implements the DataView methods under the hood:
var ArrayBufferCursor = function() {
var ArrayBufferCursor = function(arrayBuffer) {
this.dataview = new DataView(arrayBuffer, 0);
this.size = a...
Information about vertex attributes can be retrieved with the OGL function glGetProgram and the parameters GL_ACTIVE_ATTRIBUTES and GL_ACTIVE_ATTRIBUTE_MAX_LENGTH.
The location of an active shader attribute can be determined by the OGL function glGetAttribLocation, by the index of the attribute.
G...
There are various approach to read a excel file. I'll provide a example with file path parameter. You can get various way to read a file at this post.
public void ReadExcel(string path)
{
// Write data in workbook from xls document.
XSSFWorkbook workbook = new XSS...
// Import the action types to recognize them
import { ACTION_ERROR, ACTION_ENTITIES_LOADED, ACTION_ENTITY_CREATED } from './actions';
// Set up a default state
const initialState = {
error: undefined,
entities: [],
loading: true
};
// If no state is provided, we take the defa...
Information about active uniforms in a program can be retrieved with the OGL function glGetProgram and the parameters GL_ACTIVE_UNIFORMS and GL_ACTIVE_UNIFORM_MAX_LENGTH.
The location of an active shader uniform variable can be determined by the OGL function glGetActiveUniform, by the index of the ...
