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max value of integer
In C, the integer (for 32 bit machine) is 32 bits, and it ranges from -32,768 to +32,767.
In Java, the integer(long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647.
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How to turn NaN from parseInt into 0 for an empty string?
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edited Dec 2 '19 at 20:44
isherwood
42.9k1414 gold badges9494 silver badges122122 bronze badges
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How to convert a data frame column to numeric type?
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277
Since (still) nobody got check-mark, I assume that you have some practical issue in mind, most...
Reusable library to get human readable version of file size?
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22 Answers
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Active
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How to return 2 values from a Java method?
I am trying to return 2 values from a Java method but I get these errors. Here is my code:
14 Answers
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MySQL foreign key constraints, cascade delete
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392
If your cascading deletes nuke a product because it was a member of a category that was killed, ...
Creating a custom JButton in Java
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edited Oct 27 '16 at 7:19
Lahiru Ashan
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answered Aug...
Combine two or more columns in a dataframe into a new column with a new name
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132
Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb F...