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is there an virtual environment for node.js?
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Tested and confirmed now. npm install replaced npm bundle as of NPM 1.0, I believe.
– Marnen Laibow-Koser
Feb 11 '12 at 19:01
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How to print to console using swift playground?
...ln in Swift 2 beta) shows up there.
In earlier Xcode 6 versions (which by now you probably should be upgrading from anyway), show the Assistant editor (e.g. by clicking the little circle next to a bit in the output area). Console output appears there.
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Saving enum from select in Rails 4.1
...arkling</option>
</select>
Values went from "0" to "red" and now we're all set.
If you're using a regular ol' rails text_field it's:
f.select :color, Wine.colors.keys.to_a
If you want to have clean human-readable attributes you can also do:
f.select :color, Wine.colors.keys.ma...
Is returning by rvalue reference more efficient?
...e following
Beta_ab
Beta::toAB() const {
return Beta_ab(1, 1);
}
Now, it's properly moving a temporary Beta_ab object into the return value of the function. If the compiler can, it will avoid the move altogether, by using RVO (return value optimization). Now, you can do the following
Beta...
Declaration of Methods should be Compatible with Parent Methods in PHP
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This has changed in PHP 5.4, btw: * E_ALL now includes E_STRICT level errors in the error_reporting configuration directive. See here: php.net/manual/en/migration54.other.php
– Duncan Lock
Nov 17 '12 at 1:08
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How to take screenshot with Selenium WebDriver
Does anyone know if it's possible to take a screenshot using Selenium WebDriver? (Note: Not Selenium RC)
45 Answers
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C++11 rvalues and move semantics confusion (return statement)
...tor();
In the second example you have created a run time error. rval_ref now holds a reference to the destructed tmp inside the function. With any luck, this code would immediately crash.
Third example
std::vector<int> return_vector(void)
{
std::vector<int> tmp {1,2,3,4,5};
re...
How to convert a string with comma-delimited items to a list in Python?
...', 'c']
>>> ''.join(L)
'abc'
But what you're dealing with right now, go with @Cameron's answer.
>>> word = 'a,b,c'
>>> L = word.split(',')
>>> L
['a', 'b', 'c']
>>> ','.join(L)
'a,b,c'
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How to customize a requirements.txt for multiple environments?
...e for prod...
-r common.txt
prod_req==1.0
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Outside of Heroku, you can now setup environments like this:
pip install -r requirements/dev.txt
or
pip install -r requirements/prod.txt
Since Heroku looks specifically for "requirements.txt" at the project root, it should just mirror prod, like ...
C# Object Pooling Pattern implementation
...This question is a little trickier than one might expect due to several unknowns: The behaviour of the resource being pooled, the expected/required lifetime of objects, the real reason that the pool is required, etc. Typically pools are special-purpose - thread pools, connection pools, etc. - becau...