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How do I clear this setInterval inside a function?
Normally, I’d set the interval to a variable and then clear it like var the_int = setInterval(); clearInterval(the_int); but for my code to work I put it in an anonymous function:
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quick random row selection in Postgres
I have a table in postgres that contains couple of millions of rows. I have checked on the internet and I found the following
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Android: How can I validate EditText input?
I need to do form input validation on a series of EditTexts. I'm using OnFocusChangeListeners to trigger the validation after the user types into each one, but this doesn't behave as desired for the last EditText.
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What happens to git commits created in a detached HEAD state?
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The old commit is still in the reflog.
git reflog
This will show a list of commits, and the "lost" commit should be in there. You can make it into a new branch. For example, if the SHA-1 is ba5a739, then you can make a new branch named "new-bra...
Remove duplicated rows using dplyr
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Note: dplyr now contains the distinct function for this purpose.
Original answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach woul...
Android layout replacing a view with another view on run time
I have a xml -layout file main with two textviews A/B and a view C.
I have two other xml -layout files option1 and option2 .
Is it possible to load either option1 or option2 in run time via Java into C? If so, what function do I have to use?
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...mongoexport具体用法如下所示：
[root@localhost mongodb]# ./bin/mongoexport --help
Export MongoDB data to CSV, TSV or JSON files.
options:
--help produce help message
-v [ --verbose ] be more verbose (include multiple times for more
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How to handle ListView click in Android
...z, I tried setOnClickListener and setOnItemSelectedListener but missed reading setOnItemClickListener. Thanks, Tee
– teepusink
Mar 18 '10 at 8:37
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Search for one value in any column of any table inside a database
Is there a way to search for one value (in my case it is a UID of the type char(64) ) inside any column of any table inside one MS SQL Server database?
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Find element's index in pandas Series
I know this is a very basic question but for some reason I can't find an answer. How can I get the index of certain element of a Series in python pandas? (first occurrence would suffice)
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