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What is the effect of encoding an image in base64?
If I convert an image (jpg or png) to base64, then will it be bigger, or will it have the same size? How much greater will it be?
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Example for sync.WaitGroup correct?
...hen you already know how many times it will be called.
Waitgroups panic if the counter falls below zero. The counter starts at zero, each Done() is a -1 and each Add() depends on the parameter. So, to ensure that the counter never drops below and avoid panics, you need the Add() to be guaranteed ...
onclick() and onblur() ordering issue
...e a few a drawbacks. Most notably I often click then drag off the button if I've misclicked, which prevents onclick being called - if the button performs a non-Pure function (delete, post etc) you might want to preserve this and go with the flag approach.
– Brizee
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How to convert list of tuples to multiple lists?
...>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
The only difference is that you get tuples instead of lists. You can convert them to lists using
map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
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Numpy index slice without losing dimension information
...y little reason to retain the dimension of the array the slice came from. If you did, then things like:
a = np.zeros((100,100,10))
b = np.zeros(100,10)
a[0,:,:] = b
either wouldn't work or would be much more difficult to implement.
(Or at least that's my guess at the numpy dev's reasoning beh...
SELECT * FROM X WHERE id IN (…) with Dapper ORM
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Marko, that IS important. And, if you are doing it that way, you might consider finding another way of querying your data, such as doing a join or an anti-join rather than passing a list of ids. The IN clause is not the most highly performing query and ca...
Check existence of input argument in a Bash shell script
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It is:
if [ $# -eq 0 ]
then
echo "No arguments supplied"
fi
The $# variable will tell you the number of input arguments the script was passed.
Or you can check if an argument is an empty string or not like:
if [ -z "$1" ]
t...
Iterating Through a Dictionary in Swift
...confused on the answer that Xcode is giving me to this experiment in the Swift Programming Language Guide:
7 Answers
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How to convert float to int with Java
...answer is right, but I'd like to point out that Math.round() can have two different output types based on the input. Math.round(double a) returns a long. Math.round(float a) returns an int. docs.oracle.com/javase/7/docs/api/java/lang/…
– Hososugi
Mar 13 '14...
Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
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I like that approach! If someone likes keep things close to processing dictionaries, one could also use update() instead of +=: for c in counters[1:]: res.update(c).
– Dr. Jan-Philip Gehrcke
Jan 22 '15 at 21:...