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How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
How do you convert a Unix timestamp (seconds since epoch) to Ruby DateTime?
6 Answers
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Initialising an array of fixed size in python [duplicate]
I would like to know how i can initialise an array(or list), yet to be populated with values, to have a defined size.
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How to apply a function to two columns of Pandas dataframe
Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function :
12 Answers
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HTML5 Email Validation
It is said "With HTML5, we need no more js or a server side code to check if the user's input is a valid email or url address"
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Wolfram's Rule 34 in XKCD [closed]
The hover "joke" in #505 xkcd touts "I call rule 34 on Wolfram's Rule 34".
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What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
I have some code and when it executes, it throws a IndexOutOfRangeException , saying,
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What do hjust and vjust do when making a plot using ggplot?
Every time I make a plot using ggplot, I spend a little while trying different values for hjust and vjust in a line like
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How can I confirm a database is Oracle & what version it is using SQL?
I'm building an installer for an application. The user gets to select a datasource they have configured and nominate what type of database it is. I want to confirm that the database type is indeed Oracle, and if possible, what version of Oracle they are running by sending a SQL statement to the dat...
What is the preferred/idiomatic way to insert into a map?
I have identified four different ways of inserting elements into a std::map :
9 Answers
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Empty arrays seem to equal true and false at the same time
Empty arrays are true but they're also equal to false.
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