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How do popular apps authenticate user requests from their mobile app to their server?
...I imagine they use a "token" based security system, so the password is actually never stored anywhere, just used the first time to authenticate. So the app initially posts the username/password (over ssl) and the server returns a token that the app stores. For subsequent sync attempts the token is s...
How do I apply a perspective transform to a UIView?
...eTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 45.0f * M_PI / 180.0f, 0.0f, 1.0f, 0.0f);
layer.transform = rotationAndPerspectiveTransform;
Swift 5.0
if let myView = self.subviews.first {
let layer = myView.layer
var rotationAndPerspectiveTransform = CATransform3DIdenti...
How to use Swift @autoclosure
...answered Jun 8 '14 at 5:28
eddie_ceddie_c
3,31711 gold badge1212 silver badges66 bronze badges
...
Easily measure elapsed time
...
//***C++11 Style:***
#include <chrono>
std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
std::cout << "Time difference = " << std::chrono::duration_cast<std::c...
What's an elegant way to conditionally add a class to an HTML element in a view?
...ad' %>">
Finally, you can use Rail's record tag helpers such as div_for, which will automagically set your ID and class based on the record you give it. Given a Person with id 47:
# <div id="person_47" class="person good">
<% div_for @person, class: (@success ? 'good' : 'bad') do ...
Given an RGB value, how do I create a tint (or shade)?
...r lighter (tinted) color:
RGB:
To shade:
newR = currentR * (1 - shade_factor)
newG = currentG * (1 - shade_factor)
newB = currentB * (1 - shade_factor)
To tint:
newR = currentR + (255 - currentR) * tint_factor
newG = currentG + (255 - currentG) * tint_factor
newB = currentB + (255 - currentB...
Assign width to half available screen width declaratively
...
If your widget is a Button:
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="2"
android:orientation="horizontal">
<Button android:layout_width="0dp"
android:layout_height="wrap_content"
...
Is there a way to create multiline comments in Python?
... they appear in the source code.
If you try to run this code...
def parse_token(token):
"""
This function parses a token.
TODO: write a decent docstring :-)
"""
if token == '\\and':
do_something()
elif token == '\\or':
do_something_else()
elif token =...
What's the difference between event.stopPropagation and event.preventDefault?
...;/div>
With stopPropagation, only the button's click handler is called while the div's click handler never fires.
Where as if you use preventDefault, only the browser's default action is stopped but the div's click handler still fires.
Below are some docs on the DOM event properties and ...
How do I install and use curl on Windows?
...\Windows\System32"
Done
Even more easier:
Download the Win64 2000/XP x86_64 MSI installer provided by Edward LoPinto.
At the time of writing file curl-7.46.0-win64.exe was the most recent. Tested with Windows 10.
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