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What is the easiest way to push an element to the beginning of the array?

... 390 What about using the unshift method? ary.unshift(obj, ...) → ary Prepends objects to the...
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Java regex capturing groups indexes

... e.g. (\.\w+)+, or to specify where alternation should take effect, e.g. ^(0*1|1*0)$ (^, then 0*1 or 1*0, then $) versus ^0*1|1*0$ (^0*1 or 1*0$). A capturing group, apart from grouping, will also record the text matched by the pattern inside the capturing group (pattern). Using your example, (.*):...
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Python: Get the first character of the first string in a list?

... You almost had it right. The simplest way is mylist[0][0] # get the first character from the first item in the list but mylist[0][:1] # get up to the first character in the first item in the list would also work. You want to end after the first character (character z...
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What is “entropy and information gain”?

... 1051 I assume entropy was mentioned in the context of building decision trees. To illustrate, imag...
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Difference between MEAN.js and MEAN.io

...response! – CMPSoares Apr 22 '14 at 0:08 7 ...
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Selecting data frame rows based on partial string match in a column

... 150 I notice that you mention a function %like% in your current approach. I don't know if that's a r...
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How is Math.Pow() implemented in .NET Framework?

...king for an efficient approach for calculating a b (say a = 2 and b = 50 ). To start things up, I decided to take a look at the implementation of Math.Pow() function. But in .NET Reflector , all I found was this: ...
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Is it possible to set a number to NaN or infinity?

... – David Heffernan Mar 25 '11 at 22:30 2 ...
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How to fix the uninitialized constant Rake::DSL problem on Heroku?

... 205 Put this in your Rakefile above require 'rake': require 'rake/dsl_definition' ...
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What is the Ruby (spaceship) operator?

...ther 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 := if a < b t...