Tutorial by Examples: f

Full list of options: ls -a list all files including hidden file starting with '.' ls --color colored list [=always/never/auto] ls -d list directories - with ' */' ls -F add one char of */=>@| to enteries ls -i list file's inode index number ls -l list with long form...

If you want to use the shorthand you can make use of conditional logic with the following shorthand. Only the string 'false' will evaluate to true (2.0). #Done in Powershell 2.0 $boolean = $false; $string = "false"; $emptyString = ""; If($boolean){ # this does not ru...

set clipboard=unnamed This makes it possible to copy/paste between Vim and the system clipboard without specifying any special register. yy yanks the current line into the system clipboard p pastes the content of the system clipboard into Vim This only works if your Vim installation has cli...

By default communication over the channcels is sync; when you send some value there must be a receiver. Otherwise you will get fatal error: all goroutines are asleep - deadlock! as follows: package main import "fmt" func main() { msg := make(chan string) msg <- "He...

<mvc:View controllerName="sap.m.sample.ListCounter.List" xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m"> <List headerText="Fruits" items="{path:'products>/Products', sorter:{path:'Name'}, filter:{path:'Type', o...

import AVFoundation class QRScannerViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate { func viewDidLoad() { self.initCaptureSession() } private func initCaptureSession() { let captureDevice = AVCaptureDevice .defa...

Floyd-Warshall's algorithm is for finding shortest paths in a weighted graph with positive or negative edge weights. A single execution of the algorithm will find the lengths (summed weights) of the shortest paths between all pair of vertices. With a little variation, it can print the shortest path ...

int x, y; bool ready = false; void init() { x = 2; y = 3; ready = true; } void use() { if (ready) std::cout << x + y; } One thread calls the init() function while another thread (or signal handler) calls the use() function. One might expect that the use() function ...

The example above can also be implemented with fences and relaxed atomic operations: int x, y; std::atomic<bool> ready{false}; void init() { x = 2; y = 3; atomic_thread_fence(std::memory_order_release); ready.store(true, std::memory_order_relaxed); } void use() { if (re...

One of the best features of async/await syntax is that standard try-catch coding style is possible, just like you were writing synchronous code. const myFunc = async (req, res) => { try { const result = await somePromise(); } catch (err) { // handle errors here } }); Here'...

This attribute used t identify a method that is called once to perform setup before any child tests are run. For the new versions we are using OneTimeSetUp as the TestFixtureSetUp is obsolete. OneTimeSetUp [OneTimeSetUp] public void SetUp() { }

since version 9.5 postgres offers UPSERT functionality with INSERT statement. Say you have a table called my_table, created in several previous examples. We insert a row, returning PK value of inserted row: b=# INSERT INTO my_table (name,contact_number) values ('one',333) RETURNING id; id ---- ...

Let's start with a simple algorithm to see how recursion could be implemented in Ruby. A bakery has products to sell. Products are in packs. It services orders in packs only. Packaging starts from the largest pack size and then the remaining quantities are filled by next pack sizes available. For ...

.prefer_dml 1 turn on dmlformat output .prefer_dml 0 turn off dmlformat output

XmlView: <mvc:View controllerName="sap.ui.demo.wt.controller.App" xmlns="sap.m" xmlns:mvc="sap.ui.core.mvc" displayBlock="true"> <App> <pages> <Page content="{path:'Tiles>/Tiles',fact...

DATA table-name; INFILE "file-path/file-name.csv" dsd; INPUT Name $ City $ Age; RUN;

Open a raster that covers the globe and extract a subset of the raster. import gdal # Path to a tiff file covering the globe # http://visibleearth.nasa.gov/view.php?id=57752 tif_name = "/path_name/land_shallow_topo_21600.tif" # Open raster in read only mode ds = gdal.Open(tif_n...

In the view file In the base html (index.html) where we usually include the angular scripts or the html that is shared across the app, leave an empty div element, the flash messages will be appearing inside this div element <div class="flashmessage" ng-if="isVisible"> ...

In order to create a scheduler,the entry needs to be created in liferay-portlet.xml provding scheduler class and trigger value for timing of scheduler triggering <portlet-name>GetSetGo</portlet-name> <icon>/icon.png</icon> <scheduler-entry> ...