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Prevent segue in prepareForSegue method?
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Tried this in iOS 11.3 SDK from a storyboard segue and "shouldPerformSegueWithIdentifier" did get called automatically
– Menno
Feb 9 '18 at 10:23
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How do you commit code as a different user?
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Check out the --author option for git commit:
From the man page:
--author=<author>
Override the commit author. Specify an explicit author
using the standard A U Thor <author@example.com> format. Otherwise
<author> is assumed to be a pattern...
Fit cell width to content
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@diEcho I didn't write that part, that was from the example code. Regardless, it is bad practice to use the width attribute on elements. In this quick example, the inline CSS is fine, but it should be abstracted into a file if this was production-level code.
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Android Task Affinity Explanation
...een. Why is the B weather app showing and why didn't it save the settings from level D?
The programmer might be able to alleviate some confusion if Activities B and D were linked in state. That way changes to one changes the other. Each time the user opens up a new weather screen, it secretly op...
Android SQLite DB When to Close
...l prevent multiple manipulations to the database and save your application from a potential crash
so in your singleton, you might have a method like this to get your single SQLiteOpenHelper object:
private SQLiteDatabase db;
private MyDBOpenHelper mySingletonHelperField;
public MyDBOpenHelper getD...
Calculate distance between two latitude-longitude points? (Haversine formula)
...s surface – using the
‘Haversine’ formula.
function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {
var R = 6371; // Radius of the earth in km
var dLat = deg2rad(lat2-lat1); // deg2rad below
var dLon = deg2rad(lon2-lon1);
var a =
Math.sin(dLat/2) * Math.sin(dLat/2) +
Ma...
socket.shutdown vs socket.close
...s to the other end of the connection there is no further intention to read from or write to the socket. Then close frees up any memory associated with the socket.
Omitting shutdown may cause the socket to linger in the OSs stack until the connection has been closed gracefully.
IMO the names 'shutd...
Make Iframe to fit 100% of container's remaining height
...idth: 100%; and height: 100%; properties, it will span over entire screen. From this point on, you can put <iframe> tag inside it and span it over remaining space (both in width and in height) with simple width: 100%; height: 100%; CSS instruction.
Example code
body {
marg...
Python __call__ special method practical example
...e to use the functions in a similar fashion to the hashlib.foo functions:
from filehash import sha1
print sha1('somefile.txt')
Of course I could have implemented it a different way, but in this case it seemed like a simple approach.
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Does python have a sorted list?
...ule.
Installation:
pip install sortedcontainers
Usage:
>>> from sortedcontainers import SortedList
>>> l = SortedList()
>>> l.update([0, 4, 1, 3, 2])
>>> l.index(3)
3
>>> l.add(5)
>>> l[-1]
5
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