Tutorial by Examples: le

A very easy way to connect to an ORACLE database is by using oracledb module. This module handles the connection between your Node.js app and Oracle server. You can install it like any other module: npm install oracledb Now you have to create an ORACLE connection, which you can later query. co...

To simplify your querying from ORACLE-DB, you may want to call your query like this: const oracle = require('./oracle.js'); const sql = "select 'test' as c1, 'oracle' as c2 from dual"; oracle.queryObject(sql, {}, {}) .then(function(result) { console.log(result.rows[0]['C...

For more complicated projects, or in cases where you intend to gradually type a dependency, it may be cleaner to create a module. Using JQuery (although it does have typings available) as an example: // place in jquery.d.ts declare let $: any; export default $; And then in any file in your pr...

If you just want to indicate the intent of an import (so you don't want to declare a global) but don't wish to bother with any explicit definitions, you can import an ambient module. // in a declarations file (like declarations.d.ts) declare module "jquery"; // note that there are no ...

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...

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....

NSMutableArray *array = [NSMutableArray arrayWithObjects:@"Ken", @"Tim", @"Chris", @"Steve",@"Charlie",@"Melissa", nil]; NSPredicate *bPredicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'c'"]; NSArray ...

import React, { Component } from 'react'; import { Modal, Text, View, Button, StyleSheet, } from 'react-native'; const styles = StyleSheet.create({ mainContainer: { marginTop: 22, }, modalContainer: { marginTop: 22, }, }); class Example extends Component...

The package clause is not directly binded with the file where it is found. It is possible to find common elements of the package clause in diferent files. For example, the package clauses bellow can be found in the file math1.scala and in the file math2.scala. File math1.scala package org { ...

Data is usually perceived as something static that is entered into a database and later queried. But in many environments, data is actually more similar to a product in an assembly line, moving from one environment to another and undergoing transformations along the way. ■ OLTP: online transactio...

constexpr const size_t addressSize = sizeof(sockaddr_in); constexpr const uint16_t defaultPort = 80; // The port you want to use int serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); sockaddr_in serverAddress, clientAddress; memset(&serverAddress, 0, addressSize); serverAddress....

In the same way as in Open Terminal in current Xcode project folder example, you can add clear of derived data folder with hotkey. Create custom behavior (follow the steps in Open Terminal in current Xcode project folder). But use another script. Script text: #!/bin/bash rm -rf $HOME"/Lib...

Using bash you can easily locate a file with the locate command. For example say you are looking for the file mykey.pem: locate mykey.pem Sometimes files have strange names for example you might have a file like random7897_mykey_0fidw.pem. Let's say you're looking for this file but you only reme...

First declare a property like this in the ViewController @property (nonatomic) UIRefreshControl *refreshControl; Later in the viewDidLoad() set up the refreshControl as given below: self.refreshControl = [[UIRefreshControl alloc]init]; [self.tableView addSubview:self.refreshControl]; [self.re...

var person = { name: 'John Doe', age: 42, gender: 'male', bio: function() { console.log('My name is ' + this.name); } }; person.bio(); // logs "My name is John Doe" var bio = person.bio; bio(); // logs "My name is undefined" In the above code, person.bi...

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...

import WatchConnectivity var watchSession : WCSession? override func awake(withContext context: Any?) { super.awake(withContext: context) // Configure interface objects here. startWatchSession() } func startWatchSession(){ if(WCSession....

Boolean literals are the simplest of the literals in the Java programming language. The two possible boolean values are represented by the literals true and false. These are case-sensitive. For example: boolean flag = true; // using the 'true' literal flag = false; // using the 'fa...