Tutorial by Examples: element

Removing an element with the key

To remove an element with a specified key, use the .delete() method. It returns true if the element existed and has been removed, otherwise false. const obj1 = {}, obj2 = {}; const weakmap = new WeakMap([[obj1, 7]]); console.log(weakmap.delete(obj1)); // true console.log(weakmap.has(obj...

std::min_element

template <class ForwardIterator> ForwardIterator min_element (ForwardIterator first, ForwardIterator last); template <class ForwardIterator, class Compare> ForwardIterator min_element (ForwardIterator first, ForwardIterator last,Compare comp); Effects Finds the minimum element i...

Element Spacing
Outlook can sometimes add a bit of spacing on the left and right side of a element that can cause some layout-related headaches. By using the vendor-specific mso-table-lspace and mso-table-rspace CSS properties, you can be rid of those spaces and continue on to tackle the million other problems cau...

Using std::nth_element To Find The Median (Or Other Quantiles)

The std::nth_element algorithm takes three iterators: an iterator to the beginning, nth position, and end. Once the function returns, the nth element (by order) will be the nth smallest element. (The function has more elaborate overloads, e.g., some taking comparison functors; see the above link for...

Fetching all the documents with a particular value of an element

This query returns all the documents with element "company" and its value as "marklogic" cts:element-value-query(xs:QName('company'), 'marklogic'))

Checking presence of elements and attributes in documents

The following query returns the documents which have an element named "company" - cts:element-value-query( xs:QName('company'), '*', ("wildcarded"))) The following query returns the documents which have an element named "company" with an attribute named "name&...

Using an element to yield

const md = Rx.Observable.fromEvent(document, 'mousedown').map(true); // `md` will emit `true` whenever the mouse is pressed const mu = Rx.Observable.fromEvent(document, 'mouseup').map(false); // `mu` will emit `false` whenever the mouse is depressed

Using a transform function and the element index

const source = Rx.Observable.range(1, 3) .map((x, idx, obs) => `Element ${x} was at position ${idx}`); const subscription = source.subscribe( x => console.log(`Next: ${x}`), err => console.log(`Error: ${err}`), () => console.log(`Completed`) ); // => Next: Element 1...

Accessing Array Elements Using a Pointer

In C#, an array name and a pointer to a data type same as the array data, are not the same variable type. For example, int *p and int[] p, are not same type. You can increment the pointer variable p because it is not fixed in memory but an array address is fixed in memory, and you can't increment th...

Working with elements of datetime

Set single element: $dt->set( year => 2016 ); Set many elements: $dt->set( year => 2016, 'month' => 8); Add duration to datetime $dt->add( hour => 1, month => 2) Datetime subtraction: my $dt1 = DateTime->new( year => 2016, month => 8, ...

Display all elements as block

By default, Jsoup will display only block-level elements with a trailing line break. Inline elements are displayed without a line break. Given a body fragment, with inline elements: <select name="menu"> <option value="foo">foo</option> <option va...

Accessing a UI Element From Within a Task

All UI elements created and reside in the main thread of a program. Accessing these from another thread is forbidden by the .net framework runtime. Basically it is because all UI elements are thread sensitive resources and accessing a resource in a multi-threaded environment requires to be thread-sa...

Traversing child elements

Traversing from the root node to a descendant element using the child axis: /child::html/child::body/child::div/child::span Since the child axis is the default axis, this can be abbreviated to: /html/body/div/span

Select element by an exact HTML attribute value

To select an element by an exact HTML attribute use the css locator pattern [attribute=value] //selects the first element with href value '/contact' element(by.css('[href="/contact"]')); //selects the first element with tag option and value 'foo' element(by.css('option[value="f...

Select element by an HTML attribute that contains a specified value

To select an element by an HTML attribute that contains a specified value use the css locator pattern [attribute*=value] //selects the first element with href value that contains'cont' element(by.css('[href*="cont"]')); //selects the first element with tag h1 and class attribute that...

Edit row details using sub-element

This example uses a separate element to edit bound data to the row-detail template. Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import&q...

Find all elements with a certain attribute

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> /root/element[@foobar] and will return the <element foobar="hello_world" /> element.

Find all elements with a certain attribute value

Imagine the following XML: <root> <element foobar="hello_world" /> <element example="this is one!" /> </root> The following XPath expression: /root/element[@foobar = 'hello_world'] will return the <element foobar="hello_world&quo...

Creating custom elements in C++

QML came with rich set of visual elements. Using only QML we can build complex applications with these elements. Also it's very easy to build your own element based on set of standard items like Rectangle, Button, Image etc. Moreover, we can use items like Canvas to build element with custom paint...

Element structure

Defining an element with no content. <dom-module id="empty-element"> <template> <style> </style> </template> <script> Polymer({ is: 'empty-element', }); </script> </dom-module> And then you can ...

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