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Java “lambda expressions not supported at this language level”
...and In Properties Tab set Source Compatibility and Target Compatibility to 1.8 (Java 8)
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How do I convert dates in a Pandas data frame to a 'date' data type?
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Maven Snapshot Repository vs Release Repository
...ring development. A Snapshot artifact has both a version number such as “1.3.0” or “1.3” and a timestamp. For example, a snapshot artifact for commons-lang 1.3.0 might have the name commons-lang-1.3.0-20090314.182342-1.jar.
Taken from refcard
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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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Followed by @Andy's answer, you can do following to solve your second question:
In [56]: df.g...
What is dynamic programming? [closed]
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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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