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Python: Get the first character of the first string in a list?
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139
You almost had it right. The simplest way is
mylist[0][0] # get the first character from th...
Java regex capturing groups indexes
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183
Capturing and grouping
Capturing group (pattern) creates a group that has capturing property....
What is the easiest way to push an element to the beginning of the array?
...f self, moving other elements upwards.
And in use:
irb>> a = [ 0, 1, 2]
=> [0, 1, 2]
irb>> a.unshift('x')
=> ["x", 0, 1, 2]
irb>> a.inspect
=> "["x", 0, 1, 2]"
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Is it possible to set a number to NaN or infinity?
...gt;>> float('Inf') == float('Inf')
True
>>> float('Inf') == 1
False
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How is Math.Pow() implemented in .NET Framework?
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edited Sep 21 at 1:51
Josh Stodola
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What is “entropy and information gain”?
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1051
I assume entropy was mentioned in the context of building decision trees.
To illustrate, ima...
Java String - See if a string contains only numbers and not letters
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17 Answers
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How to fix the uninitialized constant Rake::DSL problem on Heroku?
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answered Jun 7 '11 at 9:31
KaleKale
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Bootstrap carousel multiple frames at once
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What is the Ruby (spaceship) operator?
...roovy is another language that supports it. Basically instead of returning 1 (true) or 0 (false) depending on whether the arguments are equal or unequal, the spaceship operator will return 1, 0, or −1 depending on the value of the left argument relative to the right argument.
a <=> b :=
i...