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Example: 14 f to c 14°F = -10°C

Example 1: error: ‘sleep’ was not declared in this scope Solution : # include <unistd.h> Include unistd . h header file will solve the error . Explanation : "sleep" function in c ++ context , include in header file "unistd.h" . otherwise we can see compilation error like below . prashad@ubuntu : ~ / test$ g ++ open_videofile . cpp `pkg - config -- cflags -- libs opencv` - g open_videofile . cpp : In function ‘ int main ( int , char * * ) ’ : open_videofile . cpp : 34 : 2 : error : ‘sleep’ was not declared in this scope sleep ( 5 ) ; ^ ~ ~ ~ ~ Example 2: sleep not declared in this scope c++ " 's' should be in the form of uppercase in Sleep"

Example: double pointers C++ # include <stdio.h> int main ( void ) { int value = 100 ; int * value_ptr = & value ; int * * value_double_ptr = & value_ptr ; printf ( "Value: %d\n" , value ) ; printf ( "Pointer to value: %d\n" , * value_ptr ) ; printf ( "Double pointer to value: %d\n" , * * value_double_ptr ) ; }

Example: mongoose.connect mongoose.connect('mongodb://localhost:27017/myapp', {useNewUrlParser: true});

Example: bootstrap center text vertically < div class = ”row” > < div class = ”col-6 align-self-center” > < div class = ”card card-block” > Center </ div > </ div > </ div >

Answer : This fixed it for me cd `brew --prefix`/Homebrew git fetch origin git reset --hard origin/master brew update worked fine after that Solution You might still find.. brew update not working after git pull origin master Here what you need to do. cd /usr/local git pull origin master brew install git Now you might already have git on your System, but what this will do it that now. Your broken brew update will automatically be updated before at first run.. Here is the link to the origin issue in HomeBrew. brew stuck I simply removed the .git directory inside of the /usr/local directory, then ran the command brew update .

Example 1: css gradient text h1 { font-size : 72 px ; background : -webkit-linear-gradient ( #eee , #333 ) ; -webkit-background-clip : text ; -webkit-text-fill-color : transparent ; } Example 2: gradient font color css h1 { font-size : 72 px ; background : -webkit-linear-gradient ( #eee , #333 ) ; -webkit-background-clip : text ; -webkit-text-fill-color : transparent ; } Example 3: css gradient generator /* 5 Best CSS Gradient Generator Links */ https : //cssgradient.io/ https : //www.colorzilla.com/gradient-editor/ https : //www.css-gradient.com/ https : //mycolor.space/gradient https : //uigradients.com/#Orca

Example 1: css attribute selector a [ target = "_blank" ] { background-color : yellow ; } /*w3schools*/ Example 2: how to stilize title property css /* use for any tag on your page */ [ data-title ] :hover :after { opacity : 1 ; transition : all 0.1 s ease 0.5 s ; visibility : visible ; } /* box for title text */ [ data-title ] :after { content : attr ( data-title ) ; /* position for title view box */ position : absolute ; bottom : -1.6 em ; left : 100 % ; z-index : 99999 ; visibility : hidden ; /* optional */ white-space : nowrap ; /* stilization */ background-color : #00FF00 ; color : #111 ; font-size : 150 % ; padding : 1 px 5 px 2 px 5 px ; box-shadow : 1 px 1 px 3 px #222222 ; opacity : 0 ; border : 1 px solid #111111 ; } [ data-title ] { position : relative ; } /* on html page in your tags */ /* <a href="example.com" data-title="M...

Answer : CSS Filter Effects It's not fully cross-browsers solution, but must work well in most modern browser. <img src="image.jpg" /> <style> img:hover { /* Ch 23+, Saf 6.0+, BB 10.0+ */ -webkit-filter: hue-rotate(240deg) saturate(3.3) grayscale(50%); /* FF 35+ */ filter: hue-rotate(240deg) saturate(3.3) grayscale(50%); } </style> EXTERNAL DEMO PLAYGROUND CSS Filter Effects IN-HOUSE DEMO SNIPPET (source:simpl.info) #container { text-align: center; } .blur { filter: blur(5px) } .grayscale { filter: grayscale(1) } .saturate { filter: saturate(5) } .sepia { filter: sepia(1) } .multi { filter: blur(4px) invert(1) opacity(0.5) } <div id="container"> <h1><a href="https://simpl.info/cssfilters/" title="simpl.info home page">simpl.info</a> CSS filters</h1> <img src="https://simpl.info/cssfilters/balham.jpg" alt="No filter: B...

Answer : If you want a portable way, then you should use the Unicode code points (which have defined glyphs associated to them): ♠ U+2660 Black Spade Suit ♡ U+2661 White Heart Suit ♢ U+2662 White Diamond Suit ♣ U+2663 Black Club Suit ♤ U+2664 White Spade Suit ♥ U+2665 Black Heart Suit ♦ U+2666 Black Diamond Suit ♧ U+2667 White Club Suit Remember that everything below character 32 in ASCII is a control character . They have a meaning associated with them and you don't have a guarantee of getting a glyph or a behavior there (even though most control characters to have glyphs, although they were never intended to be printable). Still, it's not a safe bet. However, using Unicode needs proper font and encoding support which may or may not be a problem on UNIX-likes. On Windows at least some of the above code points map to the ASCII control character glyphs you're outputting if the console is set to raster fonts (and therefore not supporting Unicode or anything else th...

Answer : it's you from the future. Here's how I fixed it: I didn't! I re-downloaded the 15.04 image from the Ubuntu website and created a startup "disk" on a USB thumb drive. Today it worked, wehereas it didn't last night :( Perhaps Canonical fixed their image... So I booted from the thumb drive and removed my existing 15.04 and installed a fresh copy! Sure I lost all of my files (VirtualBox, all installed games, etc.) but now Linux works again. Let this be a lesson to you Dustin! Never try and upgrade an Ubuntu OS! Just backup all of your files and do a clean install... just like you used to have to do with Windows! I had the exact same problem. I'm not sure exactly why it happened, but it seems my kernel was not updated. To solve that I used Ctrl + Alt + F1 to go to a text-based virtual console, logged on there, then ran: sudo apt-get install linux-generic Everything started working again. My fix for my laptop Dell xps l502x, so it ...

Example 1: zoom image css /*Zoom on hover*/ <style > .zoom { padding : 50 px ; background-color : green ; transition : transform .2 s ; /* Animation */ width : 200 px ; height : 200 px ; margin : 0 auto ; } .zoom :hover { transform : scale ( 1.5 ) ; /* (150% zoom)*/ } </style> <div class= "zoom" ></div> /*credits: w3schools.com */ Example 2: how to use image zoom effect in css .parent :hover .child , .parent :focus .child { transform : scale ( 1.2 ) ; } Example 3: how to use image zoom effect in css .parent { width : 400 px ; height : 300 px ; } .child { width : 100 % ; height : 100 % ; background-color : black ; /* fallback color */ background-image : url ( "images/city.jpg" ) ; background-position : center ; background-size : cover ; }

Example 1: css assign multiple classes to one element To specify multiple classes , separate the class names with a space , e . g . < span class = "classA classB" > . This allows you to combine several CSS classes for one HTML element . Example 2: multiple classes in element html < article class = "column wrapper" >

Example 1: price range slider bootstrap 4 < input type = " range " name = " range " step = " 50000 " min = " 100000 " max = " 1000000 " value = " " onchange = " rangePrimary.value=value " > < input type = " text " id = " rangePrimary " /> Example 2: bootstrap range slider < label for = " customRange3 " class = " form-label " > Example range </ label > < input type = " range " class = " form-range " min = " 0 " max = " 5 " step = " 0.5 " id = " customRange3 " >

Answer : This functionality is already built in to Enum [1]: >>> from enum import Enum >>> class Build(Enum): ... debug = 200 ... build = 400 ... >>> Build['debug'] <Build.debug: 200> [1] Official docs: Enum programmatic access Another alternative (especially useful if your strings don't map 1-1 to your enum cases) is to add a staticmethod to your Enum , e.g.: class QuestionType(enum.Enum): MULTI_SELECT = "multi" SINGLE_SELECT = "single" @staticmethod def from_str(label): if label in ('single', 'singleSelect'): return QuestionType.SINGLE_SELECT elif label in ('multi', 'multiSelect'): return QuestionType.MULTI_SELECT else: raise NotImplementedError Then you can do question_type = QuestionType.from_str('singleSelect') def custom_enum(typename, items_dict): class_definition = """ from...

Answer : It makes little (if any difference). The code using an additional bundle is slightly heavier (it won't make any difference in any practical application) and slightly easier to manage, being more general. If one day you decide that - before sending information inside an intent - you want to serialize the data to database - it will be a bit cleaner to have a bundle that you can serialize, add to an intent and then feed to a PendingBundle - all with one object. [update] A clarification (because of some other answers). Extras is an additional bundle that each Intent might carry (but doesn't have to), so there is no alternative between using a bundle or not using it. You are using a bundle either way. The first time you use putExtra , a mExtras bundle inside Intent is initialized and all the following putExtra are delegated to it. The bundle itself is inaccessible to you (this is by design, to avoid certain kind of bugs). putExtras does not put your bundle...