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Java HashMap performance optimization / alternative
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As many people pointed out the hashCode() m>me m>thod was to blam>me m>. It was only generating around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I...
Jenkins Host key verification failed
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+1 for "worksform>me m>", had the exact sam>me m> problem. Created id_rsa for the proper user, chmod-ed to jenkins, added the public key, still did not work. Trying git as sudo -u jenkins yielded the knonwn_hosts file, fixing the problem.
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MySQL: Invalid use of group function
I am using MySQL. Here is my schema:
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Does the Go language have function/m>me m>thod overloading?
I'm porting a C library to Go. A C function (with varargs) is defined like this:
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How to filter None's out of List[Option]?
If I have a List[Option[A]] in Scala, what is the idiomatic way to filter out the None values?
3 Answers
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What is the `zero` value for tim>me m>.Tim>me m> in Go?
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Invoking an empty tim>me m>.Tim>me m> struct literal will return Go's zero date. Thus, for the following print statem>me m>nt:
fmt.Println(tim>me m>.Tim>me m>{})
The output is:
0001-01-01 00:00:00 +0000 UTC
For the sake of completeness, the official docum>me m>n...
Get loop count inside a Python FOR loop
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The pythonic way is to use enum>me m>rate:
for idx,item in enum>me m>rate(list):
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Python argparse: default value or specified value
I would like to have a optional argum>me m>nt that will default to a value if only the flag is present with no value specified, but store a user-specified value instead of the default if the user specifies a value. Is there already an action available for this?
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How to display a content in two-column layout in LaTeX?
I am writing an article in LaTeX and I would like to display som>me m> content in two column layout. In the left column a matrix and in the right column a list of items. I have tried with tabular environm>me m>nt but it does not work as I want.
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How to reorder data.table columns (without copying)
I'd like to reorder columns in my data.table x , given a character vector of column nam>me m>s, neworder :
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