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How do I get a list of all the duplicate items using pandas in python?
...ethod to both True and False you can obtain a set from your dataframe that includes all of the duplicates.
df_bigdata_duplicates =
df_bigdata[df_bigdata.duplicated(cols='ID', take_last=False) |
df_bigdata.duplicated(cols='ID', take_last=True)
]
...
Is there anyway to exclude artifacts inherited from a parent POM?
...e).
Example
I want to use logback as my slf4j binding, but my parent pom includes the log4j dependency. I don't want to go and have to push the other children's dependence on log4j down into their own pom.xml files so that mine is unobstructed.
...
What are fail-safe & fail-fast Iterators in Java
...ators. The javadoc says:
"Most concurrent Collection implementations (including most Queues) also differ from the usual java.util conventions in that their Iterators and Spliterators provide weakly consistent rather than fast-fail traversal."
Typically, weak consistency means that if a collec...
Try-finally block prevents StackOverflowError
...from anywhere once you cannot call foo due to the overflow condition. this includes from the finally block, which is why this will, eventually (age of the universe) terminate.
– WhozCraig
Sep 16 '12 at 6:00
...
How do I “git blame” a deleted line?
...fferent branches which were merged in at different times and A...B did not include when the changes actually got merged into the mainline.)
Show a Git tree with these two commits (and a lot of the complex Git history removed):
git log --graph --oneline A B ^$(git merge-base A B)
(A is the first co...
What is the purpose of “&&” in a shell command?
...six shell grammar, which is part of an and_or list of commands, which also include the || which is an OR_IF with similar semantics.
Grammar symbols, quoted from the documentation:
%token AND_IF OR_IF DSEMI
/* '&&' '||' ';;' */
And the Grammar (also quoted from ...
How can I check in a Bash script if my local Git repository has changes?
...s just for reference.
From the Git source code there is a sh script which includes the following.
require_clean_work_tree () {
git rev-parse --verify HEAD >/dev/null || exit 1
git update-index -q --ignore-submodules --refresh
err=0
if ! git diff-files --quiet --ignore-submodule...
Why is arr = [] faster than arr = new Array?
...est in an IIFE makes a (relatively) substantial impact on the performance. Including var Array = window.Array improves the performance of the new Array test.
– user113716
Sep 10 '11 at 23:12
...
Favourite performance tuning tricks [closed]
...gous thing to do in SSMS is to use "Display Estimated Execution Plan" and "Include Actual Execution Plan". If you can eliminate huge table scans and use clustered index seeks, then you're well on your way to optimal performance.
– eksortso
May 15 '09 at 22:48
...
How do I programmatically determine if there are uncommitted changes?
...
You might want to use git status -s -uall to include untracked files.
– barfuin
Feb 15 '18 at 9:29
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