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close vs shutdown socket?
... no longer alive. You still have the file descriptor. You can still recv() from the receiving buffer. And you still need to call close() to dispose the file descriptor.
– Pavel Šimerda
Jan 21 '16 at 9:58
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What do helper and helper_method do?
...vailable for the view. This is used for any method that you need to access from both controllers and helpers/views (standard helper methods are not available in controllers). e.g. common use case:
#application_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
en...
How can I check whether an array is null / empty?
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ArrayUtils.isNotEmpty(testArrayName) from the package org.apache.commons.lang3 ensures Array is not null or empty
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How do I iterate through the files in a directory in Java?
...le.com/javase/7/docs/api/java/nio/file/DirectoryStream.html
Example taken from the Javadoc:
List<Path> listSourceFiles(Path dir) throws IOException {
List<Path> result = new ArrayList<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "*.{c,h,cpp,h...
Center content of UIScrollView when smaller
...I noticed that this, like many other centering techniques, seems to suffer from problems when using zoomToRect:. Using the contentInset approach works better, if you happen to need that functionality. See petersteinberger.com/blog/2013/how-to-center-uiscrollview for more details.
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JavaScript seconds to time string with format hh:mm:ss
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From MDN: If a parameter you specify is outside of the expected range, setSeconds() attempts to update the date information in the Date object accordingly. For example, if you use 100 for secondsValue, the minutes stored in...
What are the sizes used for the iOS application splash screen?
...the iPad with specific names. I googled iPad default png and got this info from the phunkwerks site:
iPad Launch Image Orientations
To deal with various orientation options, a new naming convention has been created for iPad launch images. The screen size of the iPad is 768×1024, notice in the dime...
How to unzip a list of tuples into individual lists? [duplicate]
...zip(*l))
[(1, 3, 8), (2, 4, 9)]
The zip() function pairs up the elements from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as separate arguments to the zip() function, so zip() pairs up 1 with 3 with 8 first, then 2 with 4 and 9. Those hap...
nodeJs callbacks simple example
...00);
Callbacks are used all over the place in Node because Node is built from the ground up to be asynchronous in everything that it does. Even when talking to the file system. That's why a ton of the internal Node APIs accept callback functions as arguments rather than returning data you can assi...
iOS 7's blurred overlay effect using CSS?
...eat=css-regions)
The key part of this technique is to split apart content from layout by using CSS Region. First define a .content element with flow-into:content and then use the appropriate structure to blur the header.
The layout structure:
<div class="phone">
<div class="phone__displ...