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An error occurred while installing pg (0.17.1), and Bundler cannot continue
I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get:
16 Answers
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Instance attribute attribute_name defined outside __init__
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@MericOzcan either setting a bunch of attributes to None and then setting them later in a parse_args function OR returning a short tuple from parse_args is OK. ideally, parse_args should be testable without needing a wizard instance.
– Erik Aronesty
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Why doesn't println! work in Rust unit tests?
I've implemented the following method and unit test:
5 Answers
5
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How do I force git to checkout the master branch and remove carriage returns after I've normalized f
...at! Hearing that, I'm guessing we could just remove the files of interest and run checkout. For me there was actually only one file I was trying to get corrected. But of course it may be all the files, hundreds, or thousands.
– Jason
Mar 19 '14 at 15:06
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How to get unique values in an array
...hat uses no libraries. This requires two new prototype functions, contains and unique
Array.prototype.contains = function(v) {
for (var i = 0; i < this.length; i++) {
if (this[i] === v) return true;
}
return false;
};
Array.prototype.unique = function() {
var arr = [];
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Boolean operators && and ||
According to the R language definition , the difference between & and && (correspondingly | and || ) is that the former is vectorized while the latter is not.
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How do I update Node.js?
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Use Node Version Manager (NVM)
It's a Bash script that lets you download and manage different versions of node. Full source code is here.
There is a separate project for nvm for Windows: github.com/coreybutler/nvm-windows
Below are the full steps to use NVM for multiple version of node on window...
what is the difference between ?:, ?! and ?= in regex?
I searched for the meaning of these expressions but couldn't understand the exact difference between them.
This is what they say:
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Best way to center a on a page vertically and horizontally? [duplicate]
Best way to center a <div> element on a page both vertically and horizontally?
30 Answers
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Getting random numbers in Java [duplicate]
I would like to get a random value between 1 to 50 in Java.
2 Answers
2
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