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cannot load such file — zlib even after using rvm pkg install zlib
... then reinstalling ruby to not use the rvm directory for zlib.
Here's how do:
$ sudo apt-get install zlib1g-dev
$ rvm reinstall 1.9.3
[Edit] As commenter @chrisfinne mentions, on CentOS/RedHat based systems:
$ sudo yum install zlib-devel
$ rvm reinstall 1.9.3
...
What does the @ symbol before a variable name mean in C#? [duplicate]
...e a string literal to change how the compiler parses the string. But what does it mean when a variable name is prefixed with the @ symbol?
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Difference between numeric, float and decimal in SQL Server
...ecimal (up to 38 digits) is insufficient
Approximate numeric data types do not store the exact values specified for many numbers; they store an extremely close approximation of the value.(Technet)
Avoid using float or real columns in WHERE clause search conditions, especially the = and <> o...
MongoDB: update every document on one field
...gardless of version, the key is that the empty condition {} will match any document. In the Mongo shell, or with any MongoDB client:
$version >= 3.2:
db.foo.updateMany( {}, <update> )
{} is the condition (the empty condition matches any document)
3.2 > $version >= 2.2:
db.foo....
How to remove/ignore :hover css style on touch devices
...ns if a user visits our website via touch device. Because the :hover CSS does not make sense, and it can even be disturbing if a tablet triggers it on click/tap because then it might stick until the element loses focus. To be honest, I don't know why touch devices feel the need to trigger :hover ...
Can a dictionary be passed to django models on create?
Is it possible to do something similar to this with a list , dictionary or something else?
2 Answers
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Ways to iterate over a list in Java
...y the list contents by removing the current element and, then, only if you do it through the remove method of the iterator itself. With index-based iteration, you are free to modify the list in any way. However, adding or removing elements that come before the current index risks having your loop sk...
How to run code when a class is subclassed? [duplicate]
...n you have to modify the thing creating the class -- i.e. type. The way to do that is to define a subclass of type -- i.e. a metaclass.
A metaclass is to its class as a class is to its instance.
In Python2 you would define the metaclass of a class with
class SuperClass:
__metaclass__ = Watc...
How to create a string with format?
I need to create a string with format which can convert int, long, double etc. types into string. Using Obj-C, I can do it via below way.
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How to convert Linux cron jobs to “the Amazon way”?
...to the cloud (Amazon EC2 machines). It's going great so far but the way we do crons is sub-optimal. I have a Amazon-specific question about how to best manage cron jobs in the cloud using "the Amazon way".
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