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What do helper and helper_method do?
...ntroller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :current_user
the helper method on the other hand, is for importing an entire helper to the views provided by the controller (and it's inherited controllers). What this means is doing
# applicat...
display: inline-block extra margin [duplicate]
...size to zero to remove the extra margin.
.container {
font-size: 0px;
letter-spacing: 0px;
word-spacing: 0px;
}
.container > div {
display: inline-block;
margin: 0px;
padding: 0px;
font-size: 15px;
letter-spacing: 1em;
word-spacing: 2em;
}
The example would then look like th...
Twitter image encoding challenge [closed]
...ssion time
Very efficient information packing
http://caca.zoy.org/raw-attachment/wiki/img2twit/so-logo.png
http://caca.zoy.org/raw-attachment/wiki/img2twit/twitter4.png
蜥秓鋖筷聝诿缰偺腶漷庯祩皙靊谪獜岨幻寤厎趆脘搇梄踥桻理戂溥欇渹裏軱骿苸髙骟市...
Iterating over dictionaries using 'for' loops
...mplicated loops it may be a good idea to use more descriptive names:
for letter, number in d.items():
print(letter, 'corresponds to', number)
It's a good idea to get into the habit of using format strings:
for letter, number in d.items():
print('{0} corresponds to {1}'.format(letter, nu...
“Default Activity Not Found” on Android Studio upgrade
...orked for me too! BUT NOTE: please write "android.intent.xxx" in lowercase letters - my fault was that the Android Studio completion suggested uppercase letters (this took me one hour) :-(
– Philipp P
Oct 17 '15 at 8:14
...
Is XSLT worth it? [closed]
...To those that can't read them, regexes are a giant mishmash of meaningless letters and symbols. It's the mindset behind regex that makes them beautiful.
– Tomalak
Aug 13 '09 at 12:27
...
How to create a video from images with FFmpeg?
...s://github.com/cirosantilli/media/blob/master/opengl-rotating-triangle.zip?raw=true
unzip opengl-rotating-triangle.zip
cd opengl-rotating-triangle
wget -O audio.ogg https://upload.wikimedia.org/wikipedia/commons/7/74/Alnitaque_%26_Moon_Shot_-_EURO_%28Extended_Mix%29.ogg
Images generated with: How ...
What C++ Smart Pointer Implementations are available?
...e rvalue auto pointer to a null pointer. Which leads to perhaps the worst drawback; they can't be used within STL containers due to the aforementioned inability to be copied. The final blow to any use case is they are slated to be deprecated in the next standard of C++.
std::auto_ptr_ref - This is ...
Explain the use of a bit vector for determining if all characters are unique
... or'd ( checker |= (1 << val)) with the designated binary value of a letter its corresponding bit it is being set to true.
The character's value is and'd with the checker (checker & (1 << val)) > 0)- if it is greater than 0 we know we have a dupe- because two identical bits set to...
Reasons for using the set.seed function
...ll "never" reproduce as I just asked for something "random":
R> sample(LETTERS, 5)
[1] "K" "N" "R" "Z" "G"
R> sample(LETTERS, 5)
[1] "L" "P" "J" "E" "D"
These two, however, are identical because I set the seed:
R> set.seed(42); sample(LETTERS, 5)
[1] "X" "Z" "G" "T" "O"
R> set.seed(4...