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Calculate difference in keys contained in two Python dictionaries
...lf.set_past - self.intersect
def changed(self):
return set(o for o in self.intersect if self.past_dict[o] != self.current_dict[o])
def unchanged(self):
return set(o for o in self.intersect if self.past_dict[o] == self.current_dict[o])
Here is some sample output:
>>&...
How do I create a basic UIButton programmatically?
How can I create a basic UIButton programmatically? For example in my view controller, when executing the viewDidLoad method, three UIButton s will be created dynamically and its layout or properties are set.
...
Get the distance between two geo points
...n using Location.DistanceBetween() since it is using Location objects but works for my purposes very well.
– ZoltanF
Feb 11 '14 at 3:59
...
Rerender view on browser resize with React
...tom Hook that listens to the window resize event, something like this:
import React, { useLayoutEffect, useState } from 'react';
function useWindowSize() {
const [size, setSize] = useState([0, 0]);
useLayoutEffect(() => {
function updateSize() {
setSize([window.innerWidth, window....
What is the difference between “text” and new String(“text”)?
... very rarely would ever want to use the new String(anotherString) constructor. From the API:
String(String original) : Initializes a newly created String object so that it represents the same sequence of characters as the argument; in other words, the newly created string is a copy of the argume...
Looping a video with AVFoundation AVPlayer?
...tCenter] addObserver:self
selector:@selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[avPlayer currentItem]];
this will preven...
Project structure for Google App Engine
...Google App Engine right when it came out, to play with the technology and work on a pet project that I had been thinking about for a long time but never gotten around to starting. The result is BowlSK . However, as it has grown, and features have been added, it has gotten really difficult to keep...
What is the difference between screenX/Y, clientX/Y and pageX/Y?
...s a picture explaining the difference between pageY and clientY.
Same for pageX and clientX, respectively.
pageX/Y coordinates are relative to the top left corner of the whole rendered page (including parts hidden by scrolling),
while clientX/Y coordinates are relative to the top left corne...
How to set size for local image using knitr for markdown?
...
You can also read the image using png package for example and plot it like a regular plot using grid.raster from the grid package.
```{r fig.width=1, fig.height=10,echo=FALSE}
library(png)
library(grid)
img <- readPNG("path/to/your/image")
grid.raster(img)
```
Wit...
How to ISO 8601 format a Date with Timezone Offset in JavaScript?
...he local time and UTC time offset then construct the URL in following format.
10 Answers
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