Tutorial by Examples: co

type ProjectIdType = ProjectId String getProject : ProjectIdType -> Cmd Msg getProject (ProjectId id) = Http.get <| "/projects/" ++ id

Occasionally we see StackOverflow Java questions (and C or C++ questions) that ask what something like this: i += a[i++] + b[i--]; evaluates to ... for some known initial states of i, a and b. Generally speaking: for Java the answer is always specified1, but non-obvious, and often difficult ...

Sometimes one would like to pass names of columns from a data frame to a function. They may be provided as strings and used in a function using [[. Let's take a look at the following example, which prints to R console basic stats of selected variables: basic.stats <- function(dset, vars){ f...

The example I'm going to discuss assumes you have a Docker installation that works in your system and a basic understanding of how to work with Node.js . If you are aware of how you must work with Docker , it should be evident that Node.js framework need not be installed on your system, rather we wo...

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder() .detectDiskWrites() .penaltyLog() //Logs a message to LogCat .build())

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder() .detectActivityLeaks() .detectLeakedClosableObjects() .penaltyLog() .build());

SET @searchTerm= 'Date Database Programming'; SELECT MATCH (Title, Author) AGAINST (@searchTerm IN NATURAL LANGUAGE MODE) Score, ISBN, Author, Title FROM book WHERE MATCH (Title, Author) AGAINST (@searchTerm IN NATURAL LANGUAGE MODE) ORDER BY MATCH (Title, Author) AGAINST (...

To configure robolectric add @Config annotation to test class or method. Run with custom Application class @RunWith(RobolectricTestRunner.class) @Config(application = MyApplication.class) public final class MyTest { } Set target SDK @RunWith(RobolectricTestRunner.class) @Config(sdk = Build...

import React, { Component } from 'react'; import { WebView } from 'react-native'; class MyWeb extends Component { render() { return ( <WebView source={{uri: 'https://github.com/facebook/react-native'}} style={{marginTop: 20}} /> ); } } ...

In order to create an use a custome tag,we need to follow couple of steps: Create a tag file,defining the attributes used by it and any variables which will be used by the tag a. The attributes need to have a name,their type and and required field with a boolean value b. The variables will be...

Sometimes it is useful to print a current binding directly from markup. A neat trick which allows that is to use an additional DOM element with a non-existing binding (KO < 3.0), custom binding or a binding that is not relevant such as uniqueName. Consider this example: <tbody data-bind=&quo...

Once the provisioning profiles are all set, next step in the process of submitting the app is to archive your code. From the dropdown of devices and simulators select option "Generic iOS device". Then, under "Product" menu select option "Archive". In case where the s...

//Hide column "A" worksheet.Column(1).Hidden = true; //Hide row 1 worksheet.Row(1).Hidden = true;

//Set the row "A" height to 15 double rowHeight = 15; worksheet.Row(1).Height = rowHeight; //Set the column 1 width to 50 double columnWidth = 50; worksheet.Column(1).Width = columnWidth; When Bestfit is set to true, the column will grow wider when a user inputs numbers in a ce...

if and else: it used to check whether the given expression returns true or false and acts as such: if (condition) statement the condition can be any valid C++ expression that returns something that be checked against truth/falsehood for example: if (true) { /* code here */ } // evaluate that ...

The break instruction: Using break we can leave a loop even if the condition for its end is not fulfilled. It can be used to end an infinite loop, or to force it to end before its natural end The syntax is break; Example: we often use break in switch cases,ie once a case i switch is satisfied...

Let's say that inside a resources file, you had a file called /icons/ok.png The full url of this file within code is qrc:/icons/ok.png. In most cases, this can be shortened to :/icons/ok.png For example, if you wanted to create a QIcon and set it as the icon of a button from that file, you could u...

SELECT E.EMPLOYEE_ID,E.LAST_NAME,E.MANAGER_ID FROM HR.EMPLOYEES E CONNECT BY PRIOR E.EMPLOYEE_ID = E.MANAGER_ID; The CONNECT BY clause to define the relationship between employees and managers.

CREATE TABLE myschema.tableNew AS ( SELECT * FROM myschema.tableOld ) WITH DATA

CREATE TABLE myschema.tableNew AS ( SELECT * FROM myschema.tableOld ) WITHOUT DATA