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how to solve “ruby installation is missing psych” error?
...d rvm to install ruby 1.9.3. even though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
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How to check for a valid URL in Java?
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Consider using the Apache Commons UrlValidator class
UrlValidator urlValidator = new UrlValidator();
urlValidator.isValid("http://my favorite site!");
There are several properties that you can set to control how this class behaves, by default http,...
How do I SET the GOPATH environment variable on Ubuntu? What file must I edit?
...ownloads packages, et cetera. Create a new directory and use that. I recommend ~/.go
– Bryan Larsen
Nov 27 '14 at 15:58
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What is a PDB file?
... @Ata: PDB, not PDF. Please separate the two in your mind - they're completely different file formats, for different purposes. Including a PDB wouldn't introduce a problem particularly; it may make a hacker's job slightly easier, but is that a particular concern for you? In general, .NET can ...
Adding an arbitrary line to a matplotlib plot in ipython notebook
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You can directly plot the lines you want by feeding the plot command with the corresponding data (boundaries of the segments):
plot([x1, x2], [y1, y2], color='k', linestyle='-', linewidth=2)
(of course you can choose the color, line width, line style, etc.)
From your example:
impor...
Add new value to an existing array in JavaScript [duplicate]
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How do I get the n-th level parent of an element in jQuery?
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What are the pros and cons of both Jade and EJS for Node.js templating? [closed]
...block in Jade is pretty powerful which can help me a lot when dealing with complex HTML code.
On the other hand, it is hard to do some simple stuff in Jade, thing like adding classes into a DIV based on a simple if condition. I need to put something like this
- if (isAdmin)
div.admin.user
- el...
How to delete a certain row from mysql table with same column values?
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How to multiply duration by integer?
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