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Image comparison - fast algorithm
...rmation than others (particularly at edges and corners), and these are the ones you'll want to use for smart image matching. Google "keypoint extraction" and "keypoint matching" and you'll find quite a few academic papers on the subject. These days, SIFT keypoints are arguably the most popular, si...
How to check if a view controller is presented modally or pushed on a navigation stack?
...This does not work if you present a view controller then it pushes another one.
– Lee
Nov 12 '15 at 13:58
3
...
Why does the is operator return false when given null?
...anks for the great question!
You're staring at an empty driveway.
Someone asks you "can your driveway hold a Honda Civic?"
Yes. Yes it can.
Someone points you at a second driveway. It is also empty. They ask "Can the current contents of my driveway fit in your driveway?"
Yes, obviously. Both...
How do I clear/delete the current line in terminal?
...or to start of line
Ctrl+e Move cursor to end of line
Ctrl+b Move back one character
Alt+b Move back one word
Ctrl+f Move forward one character
Alt+f Move forward one word
Ctrl+d Delete current character
Ctrl+w Cut the last word
Ctrl+k Cut everything after the cursor
Alt+d Cut word ...
Bash ignoring error for a particular command
...
Example:
$ cat /tmp/1.sh
particular_script()
{
false
}
set -e
echo one
particular_script || true
echo two
particular_script
echo three
$ bash /tmp/1.sh
one
two
three will be never printed.
Also, I want to add that when pipefail is on,
it is enough for shell to think that the entire pipe ...
Getting started with F# [closed]
...entations (BTW, An Introduction to Microsoft F# by Luca Bolognese is still one of the best presentations on the subject). Then read the following two must-read books:
Programming F#: A comprehensive guide for writing simple code to solve complex problems by Chris Smith
Expert F# 2.0 (Expert's Vo...
Extending the User model with custom fields in Django
...least painful and indeed Django-recommended way of doing this is through a OneToOneField(User) property.
Extending the existing User model
…
If you wish to store information related to User, you can use a one-to-one relationship to a model containing the fields for additional information. This on...
Is there a better alternative than this to 'switch on type'?
...n't added as a special case because is relationships mean that more than one distinct case might apply), is there a better way to simulate switching on type other than this?
...
How to split a string into an array of characters in Python?
...
If you want to process your String one character at a time. you have various options.
uhello = u'Hello\u0020World'
Using List comprehension:
print([x for x in uhello])
Output:
['H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd']
Using ma...
Array to String PHP?
...
I like that this one keeps the keys. This is very useful for later use.
– Apolymoxic
Jul 16 '19 at 22:29
add a commen...