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To find whether a column exists in data frame or not
...mes did.
– Docconcoct
Dec 20 '17 at 10:35
@Andrie is there a way to compare the columns to two large dataframes to see...
Understanding “randomness”
... the road from a uniform to a normal distribution by adding up 1, 2, 4, 6, 10 and 20 uniformly distributed random variables:
Edit
A few credits
Thanks to Thomas Ahle for pointing out in the comments that the probability distributions shown in the last two images are known as the Irwin-Hall dist...
How does type Dynamic work and how to use it?
...> d.foo
java.lang.RuntimeException: method not found
scala> d.foo = 10
d.foo: Any = 10
scala> d.foo
res56: Any = 10
The code works as expected - it is possible to add methods at runtime to the code. On the other side, the code isn't typesafe anymore and if a method is called that doesn'...
Simple (non-secure) hash function for JavaScript? [duplicate]
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Jared Forsyth
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answered Jan 12 '12 at 8:22
BarakBarak
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Checking if an instance's class implements an interface?
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104
As therefromhere points out, you can use class_implements(). Just as with Reflection, this all...
AngularJS directive with default options
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108
You can use compile function - read attributes if they are not set - fill them with default va...
Validate that a string is a positive integer
...formerly-allowed) way that says a leading zero means octal (base 8), e.g "010" => 8. Once you've validated the number, you can safely use parseInt(str, 10) to ensure that it's parsed as decimal (base 10). parseInt would ignore garbage at the end of the string, but we've ensured there isn't any wi...
How do I verify/check/test/validate my SSH passphrase?
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answered Dec 10 '10 at 17:20
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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Can you use hash navigation without affecting history?
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LuciaLucia
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Grep regex NOT containing string
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answered May 2 '12 at 10:10
beerbajaybeerbajay
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