Dev Stack Source

Posts

Showing posts from June, 2016

Anaconda Update All Possible Packages?

June 30, 2016

Answer : TL;DR: dependency conflicts: Updating one requires (by it's requirements) to downgrade another You are right: conda update --all is actually the way to go 1 . Conda always tries to upgrade the packages to the newest version in the series (say Python 2.x or 3.x). Dependency conflicts But it is possible that there are dependency conflicts (which prevent a further upgrade). Conda usually warns very explicitly if they occur. e.g. X requires Y <5.0, so Y will never be >= 5.0 That's why you 'cannot' upgrade them all. Resolving To add: maybe it could work but a newer version of X working with Y > 5.0 is not available in conda. It is possible to install with pip, since more packages are available in pip. But be aware that pip also installs packages if dependency conflicts exist and that it usually breaks your conda environment in the sense that you cannot reliably install with conda anymore. If you do that, do it as a last resort and af

48 Degrees Fahrenheit To Celsius Code Example

June 28, 2016

Example 1: fahrenheit to celsius formula cels = ( fahr - 32.0 ) * 5.0 / 9.0 ; //Fahr to cels fahr = ( cels * 9.0 / 5.0 ) + 32.0 ; //Cels to fahr Example 2: convert fahrenheit to celsius import java . util . Scanner ; public class Main { public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int far = sc . nextInt ( ) ; int cel = ( far - 32 ) * 5 / 9 ; System . out . printf ( "%d Fahrenheit is %d Celsius" , far , cel ) ; } }

Breaking Out Of A Recursive Query In Postgres 11

June 24, 2016

Answer : WITH RECURSIVE cte AS ( SELECT id, domain_name, valid FROM domains WHERE parent_id IS NULL UNION ALL SELECT domains.id, domains.domain_name, domains.valid FROM domains JOIN cte ON domains.parent_id = cte.id WHERE NOT cte.valid -- stop recursion when valid node reached ) SELECT id, domain_name FROM cte WHERE valid fiddle

Ghttps://www.google.com Code Example

June 23, 2016

Example 1: google.com so so so , you have the same problem as I do .. . searching "google" in google itself LMAO Example 2: google Why you searching google on google ?

Abstraction Python' Code Example

June 23, 2016

Example: Abstraction example python from abc import ABC , abstractclassmethod class Parent ( ABC ) : @abstractclassmethod def pqr ( self ) : pass class Child ( Parent ) : def pqr ( self ) : print ( "PQR" ) obj = Child ( ) obj . pqr ( )

Angular2 Dynamic Change CSS Property

June 15, 2016

Answer : 1) Using inline styles <div [style.color]="myDynamicColor"> 2) Use multiple CSS classes mapping to what you want and switch classes like: /* CSS */ .theme { /* any shared styles */ } .theme.blue { color: blue; } .theme.red { color: red; } /* Template */ <div class="theme" [ngClass]="{blue: isBlue, red: isRed}"> <div class="theme" [class.blue]="isBlue"> Code samples from: https://angular.io/cheatsheet More info on ngClass directive : https://angular.io/docs/ts/latest/api/common/index/NgClass-directive.html Just use standard CSS variables: Your global css (eg: styles.css) body { --my-var: #000 } In your component's css or whatever it is: span { color: var(--my-var) } Then you can change the value of the variable directly with TS/JS by setting inline style to html element: document.querySelector("body").style.cssText = "--my-var: #000"; Otherwise you

Css Sticky Element To Another Code Example

June 14, 2016

Example: how to make a div sticky using js <!DOCTYPE html > <html > <head > <title > How to make make a div stick to the top of the screen once it’s been scrolled to? </title > <style > .sticky-div { background-color : green ; position : relative ; width : 100 % ; padding : 10 px 0 px ; } .start { height : 100 px ; } .end { height : 500 px ; } </style> </head> <body> <h1 style= "color: green" > GeeksforGeeks </h1> <b> How to make make a div stick to the top of the screen once it’s been scrolled to? </b> <p class= "start" > A Computer Science portal for geeks. It contains well written , well thought and well explained compu

Array Length Python Code Example

June 14, 2016

Example 1: size array python size = len ( myList ) Example 2: python get array length # To get the length of a Python array , use 'len()' a = arr . array ( ‘d’ , [ 1.1 , 2.1 , 3.1 ] ) len ( a ) # Output : 3 Example 3: find array length python array = [ 1 , 2 , 3 , 4 , 5 ] print ( len ( arr ) ) Example 4: python array length len ( my_array ) Example 5: find array length in python a = arr . array ( 'd' , [ 1.1 , 2.1 , 3.1 ] ) len ( a )

Align Right Inside Flex Column Code Example

June 13, 2016

Example 1: flexbox align right and left .primary-nav { display : -webkit-flex ; display : flex ; list-style-type : none ; padding : 0 ; justify-content : flex-end ; } .left { margin-right : auto ; } Example 2: flex align children to side flex-direction : column ; align-items : flex-start ; //left align-items : center ; //center align-items : flex-end ; //right

Javascript Array Declaration Code Example

June 10, 2016

Example 1: javascript array //create an array like so: var colors = [ "red" , "blue" , "green" ] ; //you can loop through an array like this: for ( var i = 0 ; i < colors . length ; i ++ ) { console . log ( colors [ i ] ) ; } Example 2: javascript declare array var array = [ ] Example 3: javacript array [ element0 , element1 , . . . , elementN ] new Array ( element0 , element1 [ , . . . [ , elementN ] ] ) new Array ( arrayLength ) Example 4: how define array js var Names = [ "Arbab" , "Ali" , "Ahsan" ] Example 5: javascript get array value var array = [ ] array [ 0 ] = "hi" array [ 1 ] = "dude" var done = false while ( done == false ) { var valueToFind = "hi" ; var rounds = array . length ; if ( rounds < 0 ) { return false } if ( array [ rounds ] == valueToFind ) { done = true return rounds } rounds

Search This Blog