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Automatic counter in Ruby for each?
...dex, you can use the zip method to pair indexes with elements:
blahs = %w{one two three four five}
puts (1..blahs.length).zip(blahs).map{|pair|'%s %s' % pair}
which produces:
1 one
2 two
3 three
4 four
5 five
share
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How can I recall the argument of the previous bash command?
...nd had two arguments, like this
ls a.txt b.txt
and you wanted the first one, you could type
!:1
giving
a.txt
Or if you wanted both, you could type
!:1-2
giving
a.txt b.txt
You can extend this to any number of arguments, eg:
!:10-12
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C# generic list how to get the type of T? [duplicate]
.... Fix below stackoverflow.com/a/13608408/284795
– Colonel Panic
Nov 28 '12 at 15:24
I know that the answer is very old...
Is 1.0 a valid output from std::generate_canonical?
I always thought random numbers would lie between zero and one, without 1 , i.e. they are numbers from the half-open interval [0,1). The documention on cppreference.com of std::generate_canonical confirms this.
...
What's wrong with nullable columns in composite primary keys?
...
Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Addito...
How to search by key=>value in a multidimensional array in PHP
... This is a good solution if you want to search an array that is only one level deep, but this particular question was about searching recursively into a deep array ("the function has to be recursive to get down to the deepest level").
– orrd
Jun 18 '15 at...
How Does Modulus Divison Work
...ake this the wrong way, but your examples do not clear anything up for someone that has absolutely no clue what's going on with modulous divison. You left out very important steps that explain where that remainder comes from. Marcin M.'s answer below explained the process better. Please consider ...
Choosing between qplot() and ggplot() in ggplot2 [closed]
I'm starting to use the great ggplot2 package for plotting in R, and one of the first things I ask myself before each plot is "well, will I use qplot or ggplot ?"
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Why are only final variables accessible in anonymous class?
...ype... anything like that. Basically it's a bit like communicating between one method and another: changes made to the parameters of one method aren't seen by its caller, but changes made to the objects referred to by the parameters are seen.
If you're interested in a more detailed comparison betwe...
Why am I getting a NoClassDefFoundError in Java?
... @DaveL. Thanks! Jared's answer with 400+ upvotes is way below! One answer with -4 up(down?)votes is way above it. There is something fishy about SO's answer ordering logic.
– Saurabh Patil
Jul 31 '17 at 14:00
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