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How to run functions in parallel?
... print(f'{seconds} has been processed')
secs_list = [2,4, 6, 8, 10, 12]
Now, if your operation is IO bound, then you can use the ThreadPoolExecutor as such:
with ThreadPoolExecutor() as executor:
results = executor.map(sleep_secs, secs_list)
Note how map is used here to map your function to ...
Does .asSet(…) exist in any API?
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Now with Java 8 you can do this without need of third-party framework:
Set<String> set = Stream.of("a","b","c").collect(Collectors.toSet());
See Collectors.
Enjoy!
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How to configure Sublime Text 2/3 to use direct Ctrl+Tab order and to create new tabs after the last
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For people who don't know how to directly edit the sublime-keymap (like me): Click preferences -> Key Bindings - User. Copy above code in the file (between the brackets)
– Mathias711
Jan 13 '15 at 8:12
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Make .gitignore ignore everything except a few files
... in anything other than the root dir won't be found anyway. I'm using this now (with *.pl) and all *.pl files are being ignored even though there are many in the subdirectories below the .gitignore file
– PandaWood
Nov 6 '11 at 1:44
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What is the full path to the Packages folder for Sublime text 2 on Mac OS Lion
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In addition, the user's library directory is now hidden by default in newer versions of OSX. Run chflags nohidden ~/Library in the terminal to reveal them.
– DA.
Jul 4 '13 at 16:51
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How to create custom easing function with Core Animation?
... we're done
[animation setValues:values];
return(animation);
}
@end
Now usage will look something like this:
// define a parametric function
KeyframeParametricBlock function = ^double(double time) {
return(1.0 - pow((1.0 - time), 2.0));
};
if (layer) {
[CATransaction begin];
[CATran...
static allocation in java - heap, stack and permanent generation
...ld request to go through all of the points and comment on them. I came to know that memory allocation is JVM specific, so I must say beforehand, that my question is Sun specific.
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vector::at vs. vector::operator[]
I know that at() is slower than [] because of its boundary checking, which is also discussed in similar questions like C++ Vector at/[] operator speed or ::std::vector::at() vs operator[] << surprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() met...
Drop all duplicate rows across multiple columns in Python Pandas
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This is much easier in pandas now with drop_duplicates and the keep parameter.
import pandas as pd
df = pd.DataFrame({"A":["foo", "foo", "foo", "bar"], "B":[0,1,1,1], "C":["A","A","B","A"]})
df.drop_duplicates(subset=['A', 'C'], keep=False)
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Assign multiple columns using := in data.table, by group
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This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# ...