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How can I read command line parameters from an R script?
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Generate a random date between two other dates
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Convert both strings to timestamps (in your chosen resolution, e.g. milliseconds, seconds, hou...
Java “lambda expressions not supported at this language level”
...and In Properties Tab set Source Compatibility and Target Compatibility to 1.8 (Java 8)
Screenshot:
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Occurrences of substring in a string
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The last line was creating a problem. lastIndex would never be at -1, so there would be an infinite loop. This can be fixed by moving the last line of code into the if block.
String str = "helloslkhellodjladfjhello";
String findStr = "hello";
int lastIndex = 0;
int count = 0;
while(lastInd...
set DateTime to start of month
...var now = DateTime.Now;
var startOfMonth = new DateTime(now.Year,now.Month,1);
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Pandas DataFrame Groupby two columns and get counts
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126
Followed by @Andy's answer, you can do following to solve your second question:
In [56]: df.g...
How do I find duplicate values in a table in Oracle?
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Which MySQL data type to use for storing boolean values
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