Tutorial by Examples: c

this in function refers to instance object used to call that function but this in arrow function is equal to this of function in which arrow function is defined. Let's understand using diagram Understanding using examples. var normalFn = function(){ console.log(this) // refers to global/windo...

File structure / -src/ awesome.service.ts another-awesome.service.ts awesome.module.ts -index.ts -tsconfig.json -package.json -rollup.config.js -.npmignore Service and module Place your awesome work here. src/awesome.service.ts: export ...

DynamoDB is a Distributed NoSQL database, based on key-value architecture, fully managed by Amazon Web Services. It was designed to provide scalability, redundancy and failover in predictable performance.

<?php // if device exists, update timestamp $stmt = $mysqli->prepare("UPDATE new_devices SET nd_timestamp=? WHERE nd_deviceid=?"); $stmt->bind_param('ss', $now, $device); $stmt->execute(); //echo "Affected Rows: ".$stmt->affected_rows; // T...

One more way to use ajax in cakephp. Cakephp provide itself for ajax request. Please see example. $data = $this->Js->get('#id')->serializeForm(array('isForm' => true, 'inline' => true)); //on click send request to controller and displays response data in view $this->Js->get...

Celery requires a broker to handle message-passing. We use RabbitMQ because it’s easy to setup and it is well supported. Install rabbitmq using the following command sudo apt-get install rabbitmq-server Once the installation is complete, create user, add a virtual host and set permissions. sud...

When trying to filter some record using multiple value in a selector. First you must use the px:PXMultiSelector in the aspx page instead of the normal px:PXSelector. Then after you must create yourself a graph containing at least three views and a view delegate. you will also need at least a basic ...

Suppose this struct is defined and compiled with a 32 bit compiler: struct test_32 { int a; // 4 byte short b; // 2 byte int c; // 4 byte } str_32; We might expect this struct to occupy only 10 bytes of memory, but by printing sizeof(str_32) we see it uses 12 by...

This example shows how to override ToString method in generated class // create an Assembly and new type var name = new AssemblyName("MethodOverriding"); var dynAsm = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.RunAndSave); var dynModule = dynAsm.DefineDyn...

Following example will help to give equal space to an item in GridLayout. ItemOffsetDecoration.java public class ItemOffsetDecoration extends RecyclerView.ItemDecoration { private int mItemOffset; private int spanCount = 2; public ItemOffsetDecoration(int itemOffset) { ...

This example will help to have the Edit text with the icon at the right side. Note: In this just I am using setCompoundDrawablesWithIntrinsicBounds, So if you want to change the icon position you can achieve that using setCompoundDrawablesWithIntrinsicBounds in setIcon. public class MKEditTe...

Here we can find some useful method using PackageManager, Below method will help to get the app name using package name private String getAppNameFromPackage(String packageName, Context context) { Intent mainIntent = new Intent(Intent.ACTION_MAIN, null); mainIntent.addCategory(Intent.CATE...

with the number 100 in cell A1, the results of these calculations =DEC2BIN(A1) =DEC2OCT(A1) =DEC2HEX(A1) =BIN2DEC(A1) =OCT2DEC(A1) =HEX2DEC(A1) is 1100100 144 64 4 64 256 note that the first 3 functions are left justified, as they are strings, and the last 3 are r...

Vim saves all your unsaved edits in a swap file, an extra file that gets deleted once the changes are committed by saving. The name of the swap file is usually the name of the file being edited preceded by a . and with a .swp suffix (you can see it with :sw). So in case your vim process terminates ...

Using the POWERSHELL command, we can execute a 1-line command directly from a batch script, without any temporary file. Here's the syntax. powershell.exe -Command <yourPowershellCommandHere> You may also want to include other flags, like -Nologo to improve the actual outcome.

NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier]; [[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];

In landscape orientation \documentclass[final,t]{beamer} \mode<presentation> { \usetheme{Berlin} } \usepackage[orientation=landscape,size=a1,scale=1,debug]{beamerposter} \usepackage{lipsum} % for dummy text \title[]{\huge Awesome title} \author[]{\large \textbf{Author Name...

Docs: lifecycle callbacks, ready. class MyElement extends Polymer.Element { constructor() { super(); /* ... */ } ready() { super.ready(); /* ... */ } connectedCallback() { super.connectedCallback(); /* ... */ } disconnectedCallback() { super.disconnectedCallback(); /* ... */ } attribut...

Listing services systemctl To list running services systemctl --failed To list failed services Managing Targets (Similar to Runlevels in SysV) systemctl get-default To find the default target for your system systemctl set-default <target-name> To set the default target for your syst...

\documentclass[12pt]{article} \usepackage{titleps} \usepackage{fancyhdr} \usepackage{graphicx} \usepackage{lipsum} % for dummy text \pagestyle{myheadings} \pagestyle{fancy} \fancyhf{} \setlength{\headheight}{30pt} \renewcommand{\headrulewidth}{4pt} \renewcommand{\footrulewidth}{2pt...