Tutorial by Examples: g

The most effective way to resolve curl to a different server is to use the --resolve option. This option will insert the address into curl's DNS cache, so it will effectively make curl believe that's the address it got when it resolved the name. Like so: curl --resolve eaxmple.com:80:1.2.3.4 http:...

The "Host:" header is a normal way an HTTP client tells the HTTP server which server it speaks to. By passing custom modified "Host:" header you can have the server respond with the content of the site, even if you didn't actually connect to the host name. For example, if you ha...

Lets have the following example.bat and call it with arguments 1 ,2 and 3: @echo off ( shift shift echo %1 ) As the variable expansion will change after the the end brackets context is reached the output will be: 1 As this might be an issue when shifting inside brackets ...

from django.contrib.auth.models import User class UserAdmin(admin.ModelAdmin): list_display = ('email', 'first_name', 'last_name') list_filter = ('is_staff', 'is_superuser') admin.site.unregister(User) admin.site.register(User, UserAdmin) We need to unregister before regis...

Python's datetime.datetime objects have a tzinfo attribute that is used to store time zone information. When the attribute is set the object is considered Aware, when the attribute is not set it is considered a Naive. To ensure that a timezone is naive or aware, you can use .is_naive() and .is_awar...

Declaring a DLL procedure to work with different VBA versions: Option Explicit #If Win64 Then Private Declare PtrSafe Sub xLib "Kernel32" Alias "Sleep" (ByVal dwMilliseconds As Long) #ElseIf Win32 Then Private Declare Sub apiSleep Lib "Kernel32" Ali...

https://logging.apache.org/log4cxx/ currently undergoing Incubation - there is no official release update/bug fixes once in the past 12 years, last release was 2008 user can select different LogLevels – TRACE, DEBUG, INFO, WARN, ERROR, and FATAL hierarchical Loggers it is possible to log asy...

https://sourceforge.net/projects/log4cplus/ updates/bug fixes - last release was Jan. 2016 user can select select different LogLevels – TRACE, DEBUG, INFO, WARN, ERROR, and FATAL hierarchical Loggers supports multi–threaded applications but is not safe to be used from asynchronous signals’ ha...

https://sourceforge.net/projects/log4cpp/ bug fixes are about once a year, last release was April 2015 supports multi-threaded applications •no clear documentation exist is licensed under the GNU Lesser General Public License (LGPL) as of version 0.2.1, before that have been released under the...

class MyDelegate { operator fun getValue(owner: Any?, property: KProperty<*>): String { return "Delegated value" } } val foo : String by MyDelegate() println(foo) The example prints Delegated value

interface Foo { fun example() } class Bar { fun example() { println("Hello, world!") } } class Baz(b : Bar) : Foo by b Baz(Bar()).example() The example prints Hello, world!

val a = Array(3) { i -> i * 2 } // creates an Array<Int> of size 3 containing [0, 2, 4]

General-purpose stopwatch for timing how long a function takes to run: object Benchmark { fun realtime(body: () -> Unit): Duration { val start = Instant.now() try { body() } finally { val end = Instant.now() return Duration.b...

<View style={[(this.props.isTrue) ? styles.bgcolorBlack : styles.bgColorWhite]}> If the value of isTrue is true then it will have black background color otherwise white.

If you are unsure which rules to list in your .gitattributes file, or you just want to add generally accepted attributes to your project, you can shoose or generate a .gitattributes file at: https://gitattributes.io/ https://github.com/alexkaratarakis/gitattributes

PGSQL> SELECT COALESCE(NULL, NULL, 'HELLO WORLD'); coalesce -------- 'HELLO WORLD'

PGSQL> SELECT COALESCE(NULL, NULL, 'first non null', null, null, 'second non null'); coalesce -------- 'first non null'

PGSQL> SELECT COALESCE(NULL, NULL, NULL); coalesce --------

<Image style={[this.props.imageStyle]} source={this.props.imagePath ? this.props.imagePath : require('../theme/images/resource.png')} /> If the path is available in imagePath then it will be assigned to source else the default image path will be assigned.

let imagePath = require("../../assets/list.png"); <Image style={{height: 50, width: 50}} source={imagePath} /> From external resource: <Image style={{height: 50, width: 50}} source={{uri: userData.image}} />