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It is more efficient to use if-return-return or if-else-return?
Suppose I have an if statement with a return . From the efficiency perspective, should I use
8 Answers
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How to find encoding of a file via script on Linux?
...ere are no non-ascii chars in your utf-8 file, then it's indistinguishable from ascii :)
– vadipp
Mar 2 '17 at 10:36
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How do I limit the number of results returned from grep?
I would like to say 10 lines max from grep.
5 Answers
5
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How do I format a number in Java?
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From this thread, there are different ways to do this:
double r = 5.1234;
System.out.println(r); // r is 5.1234
int decimalPlaces = 2;
BigDecimal bd = new BigDecimal(r);
// setScale is immutable
bd = bd.setScale(decimalPla...
How do you delete a column by name in data.table?
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Any of the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents...
Python argparse: How to insert newline in the help text?
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Try using RawTextHelpFormatter:
from argparse import RawTextHelpFormatter
parser = ArgumentParser(description='test', formatter_class=RawTextHelpFormatter)
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What to do with commit made in a detached head
...detached head, don't checkout old commits. If you still want all the files from there, but as a new commit, then you could checkout the directory from the commit, instead of the commit itself. See this answer
– lucidbrot
Dec 3 '17 at 10:35
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Directory-tree listing in Python
... # Advanced usage:
# editing the 'dirnames' list will stop os.walk() from recursing into there.
if '.git' in dirnames:
# don't go into any .git directories.
dirnames.remove('.git')
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windows service vs scheduled task
...recommend you separate out your processing code into a different component from the console app or Windows Service. Then you have the choice, either to call the worker process from a console application and hook it into Windows Scheduler, or use a Windows Service.
You'll find that scheduling a Wind...
Extract a number from a string (JavaScript)
I have a string in JavaScript like #box2 and I just want the 2 from it.
21 Answers
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