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Getting Java version at runtime
I need to work around a Java bug in JDK 1.5 which was fixed in 1.6. I'm using the following condition:
12 Answers
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Summarizing multiple columns with dplyr? [duplicate]
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#> <int> <dbl> <dbl> <dbl> <dbl>
#> 1 1 3.08 2.98 2.98 2.91
#> 2 2 3.03 3.04 2.97 2.87
#> 3 3 2.85 2.95 2.95 3.06
If you want to summarize only certain columns, use summarise_at or summarise_if functions.
Alternatively, the purrrl...
Are there any O(1/n) algorithms?
Are there any O(1/n) algorithms?
32 Answers
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How do you compare two version Strings in Java?
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edited Jan 12 '15 at 15:35
Balder
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Big O, how do you calculate/approximate it?
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1486
I'll do my best to explain it here on simple terms, but be warned that this topic takes my st...
Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
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Save the conditions in a list:
List<string> conditions = new List<string>();
if ...
Pandas: drop a level from a multi-level column index?
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321
You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), ("...
Print all but the first three columns
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19 Answers
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How to print last two columns using awk
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You can make use of variable NF which is set to the total number of fields in the input recor...