Tutorial by Examples: el

set oDic = CreateObject("Scripting.Dictionary") oDic.add "USA", "United States of America" oDic.add "UK", "United Kingdom" oDic.add "CAN", "Canada" ' Delete only if Key exists If oDic.Exists("UK") Then oDic.R...
Sometimes a query looks like this, with a * in the SELECT clause. SELECT item.*, /* nonstandard */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id Such a query needs to be refactored to comply with the ONLY_FULL_GROUP_BY sta...
Use a <template> element to design a HTML template that you can then reuse in your code. <template id="Template1"> Hello, World ! <template> <div id="Target1"></div> <script> Target1.appendChild( Template1.content.cloneNode( tr...
Create a new HTML tag named <hello-world> that will display "Hello, World!": <script> //define a class extending HTMLElement class HelloWorld extends HTMLElement { connectedCallback () { this.innerHTML = 'Hello, World!' } } //register the new custom elem...
Add a Shadow DOM to a div that will display "Hello, World!" instead of its initial content. <div id="Div1">intial content</div> <script> var shadow = Div1.attachShadow( { mode: 'open' } ) shadow.innerHTML = "Hello, World!" </script>...
Import an HTML file that will add a div with "Hello, World!" at the end of the main document's DOM tree. Imported file hello.html: <script> var div = document.createElement( 'div' ) div.innerHTML = 'Hello, World!' document.body.appendChild( div ) </script> Mai...
This example combines Custom Element, Template, Shadow DOM and HTML Import to display a the "Hello, World!" string in HTML. In file hello-world.html: <!-- 1. Define the template --> <template> Hello, World! </template> <script> var template = document....
Nested if()...else statements take more execution time (they are slower) in comparison to an if()...else ladder because the nested if()...else statements check all the inner conditional statements once the outer conditional if() statement is satisfied, whereas the if()..else ladder will stop condit...
Elements of String are characters that can be accessed by the indexing operation string[index]. val str = "Hello, World!" println(str[1]) // Prints e String elements can be iterated with a for-loop. for (c in str) { println(c) }
You can delete trailing spaces with the following command. :%s/\s\+$//e This command is explained as follows: enter Command mode with : do this to the entire file with % (default would be for the current line) substitute action s / start of the search pattern \s whitespace character \+ e...
You can delete all blank lines in a file with the following command: :g/^$/d This command is explained as follows: enter Command mode with : g is a global command that should occur on the entire file / start of the search pattern the search pattern of blank line is ^g /end of the search pat...
//create a list to hold all the values List<string> excelData = new List<string>(); //read the Excel file as byte array byte[] bin = File.ReadAllBytes("C:\\ExcelDemo.xlsx"); //or if you use asp.net, get the relative path byte[] bin = File.ReadAllBytes(Server.MapPath(&q...
Let's say that you have the following class: public class PersonInfo { public int ID { get; set; } [Display(Name = "First Name")] [Required(ErrorMessage = "Please enter your first name!")] public string FirstName{ get; set; } [Display(Name = "L...
For iterating more than two lists simultaneously within list comprehension, one may use zip() as: >>> list_1 = [1, 2, 3 , 4] >>> list_2 = ['a', 'b', 'c', 'd'] >>> list_3 = ['6', '7', '8', '9'] # Two lists >>> [(i, j) for i, j in zip(list_1, list_2)] [(1, '...
This: class Foo extends Dynamic { // Expressions are only rewritten to use Dynamic if they are not already valid // Therefore foo.realField will not use select/updateDynamic var realField: Int = 5 // Called for expressions of the type foo.field def selectDynamic(fieldName: String) = ...
Slightly counterintuitively (but also the only sane way to make it work), this: val dyn: Dynamic = ??? dyn.x(y) = z is equivalent to: dyn.selectDynamic("x").update(y, z) while dyn.x(y) is still dyn.applyDynamic("x")(y) It is important to be aware of this, or else...
The example builds a string from the name of the parent record, the name of this record, and the memo of this record. {createdfrom} || ' ' || {name} || ' ' || {memo}
'<div style="font-size:11pt">' || expression || '</div>'
If you haven't already lets simply start this file of with: class HelloWorldLeftAndMain extends LeftAndMain { } Configure The first thing you should do, is define the $url_segment that will be used to access the interface, and the title ($menu_title) that will appear in the side navigation m...

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