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In addition to named imports, you can provide a default export. // circle.js export const PI = 3.14; export default function area(radius) { return PI * radius * radius; } You can use a simplified syntax to import the default export. import circleArea from './circle'; console.log(circle...

A useful feature of namespaces is that you can expand them (add members to it). namespace Foo { void bar() {} } //some other stuff namespace Foo { void bar2() {} }

One of the most common tasks is retrieving an existing element from the DOM to manipulate. Most commonly these methods are executed on document, because it is the root node, but all these methods work on any HTML element in the tree. They will only return children from the node it is executed on. R...

This page describes how to use the Meteor command-line tool (for example, when downloading packages, deploying your app, etc) behind a proxy server. Like a lot of other command-line software, the Meteor tool reads the proxy configuration from the HTTP_PROXY and HTTPS_PROXY environment variables (th...

The easiest way to get up and running is to install Git for Windows from this download page, and select "Use Git and optional Unix tools from the Windows Command Prompt" as in the screenshot below. After this, meteor admin get-machine <os-architecture> will work exactly as it does...

The Autocomplete widgets provides suggestions while you type into the field. <script> $(document).ready(function() { var tags = ["ask","always", "all", "alright", "one", "foo", "blackberry", "tweet","...

Dialog is a window which is overlay positioned within the viewport. <script> $(function() { $( "#dialog" ).dialog(); }); </script> <div id="dialog" title="Basic dialog"> <p>This is the default dialog which is useful for displayin...

Enable draggable functionality on any DOM element. <script> $(function() { $( "#draggable" ).draggable(); }); </script> <div id="draggable" class="ui-widget-content"> <p>Drag me around</p> </div>

Standard Collections Java Collections framework A simple way to construct a List from individual data values is to use java.utils.Arrays method Arrays.asList: List<String> data = Arrays.asList("ab", "bc", "cd", "ab", "bc", "cd"); ...

If you are using the PASSWORD_DEFAULT method to let the system choose the best algorithm to hash your passwords with, as the default increases in strength you may wish to rehash old passwords as users log in <?php // first determine if a supplied password is valid if (password_verify($plaintex...

On StackExchange sites, code snippets may provide optional syntax highlighting. On sites like Stack Overflow the default language is derived from the tags used in the associated question (if applicable). In addition, a code snippet's syntax highlighting language may also be defined by adding an HTML...

The following C source file (which we will call hello.c for demonstration purposes) produces an extension module named hello that contains a single function greet(): #include <Python.h> #include <stdio.h> #if PY_MAJOR_VERSION >= 3 #define IS_PY3K #endif static PyObject *hell...

To find files/directories with a specific name, relative to pwd: $ find . -name "myFile.txt" ./myFile.txt To find files/directories with a specific extension, use a wildcard: $ find . -name "*.txt" ./myFile.txt ./myFile2.txt To find files/directories matching one of ma...

Sometimes we will need to run commands against a lot of files. This can be done using xargs. find . -type d -print | xargs -r chmod 770 The above command will recursively find all directories (-type d) relative to . (which is your current working directory), and execute chmod 770 on them. The -...

A lambda expression provides a concise way to create simple function objects. A lambda expression is a prvalue whose result object is called closure object, which behaves like a function object. The name 'lambda expression' originates from lambda calculus, which is a mathematical formalism invented...

In this example we're going to look at testing webhook notifications in sandbox, using ngrok to provide a tunnel for our Node HTTP listener, running on localhost, to the internet. For this example, we're going to be using Node to set up notification webhooks for payment events (such as a payment bei...

Browse to File > New > Solution to bring you up the new project dialog. Select Android App and press Next. Configure your app by setting your app name and organization ID. Select the Target Platform most suited for your needs, or leave it as the default. Press Next: Set your Project name ...

Preferences nodes can be exported into a XML document representing that node. The resulting XML tree can be imported again. The resulting XML document will remember whether it was exported from the user or system Preferences. To export a single node, but not its child nodes: Java SE 7 try (Output...

void Main() { unsafe { int[] a = {1, 2, 3}; fixed(int* b = a) { Console.WriteLine(b[4]); } } } Running this code creates an array of length 3, but then tries to get the 5th item (index 4). On my machine, this printed 1910457872, bu...

This uses the Dropbox Python SDK to upload a file to the Dropbox API from the local file as specified by file_path to the remote path as specified by dest_path. It also chooses whether or not to use an upload session based on the size of the file: f = open(file_path) file_size = os.path.getsize(fi...