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How do I concatenate multiple C++ strings on one line?
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MichelMichel
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Check if key exists and iterate the JSON array using Python
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If all you want is to check if key exists or not
h = {'a': 1}
'b' in h # returns False
If you want to check if there is a value for key
h.get('b') # returns None
Return a default value if actual value is missing
h.get('b'...
What is the best way to ensure only one instance of a Bash script is running? [duplicate]
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If the script is the same across all users, you can use a lockfile approach. If you acquire the lock, proceed else show a message and exit.
As an example:
[Terminal #1] $ lockfile -r 0 /tmp/the.lock
[Terminal #1] $
[Terminal #2] $ lockfile -r 0 /tmp/the....
What does each of the [y,n,q,a,d,/,K,j,J,g,e,?] stand for in context of git -p
...this hunk nor any of the remaining ones
a - stage this hunk and all later hunks in the file
d - do not stage this hunk nor any of the later hunks in the file
g - select a hunk to go to
/ - search for a hunk matching the given regex
j - leave thi...
UIButton custom font vertical alignment
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Andrés Pizá Bückmann
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answered Nov 29 '11 at 16:27
kolyuchiykolyuchiy
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Postgresql SELECT if string contains
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Frans van BuulFrans van Buul
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Is ASCII code 7-bit or 8-bit?
...ans it can be fit into 7-bits. So can't it be argued that ASCII bit is actually 7-bit code?
6 Answers
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How do I automatically update a timestamp in PostgreSQL
I want the code to be able to automatically update the time stamp when a new row is inserted as I can do in MySQL using CURRENT_TIMESTAMP.
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How does std::move() transfer values into RValues?
... even mean and how can it bind to lvalue?
To allow perfect forwarding, C++11 standard provides special rules for reference collapsing, which are as follows:
Object & & = Object &
Object & && = Object &
Object && & = Object &
Object && &&a...
Storing Images in PostgreSQL
...we see that image sizes, and number of images, are growing and growing, in all applications...
We need some distinction between "original image" and "processed image", like thumbnail.
As Jcoby's answer says, there are two options, then, I recommend:
use blob (Binary Large OBject): for original imag...