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What is a Y-combinator? [closed]
... "It is not a combinator, because the Y in the body of the definition is a free variable which is only bound once the definition is complete..." I think the cool thing about Y-combinators is that they produce recursion by evaluating the fixed-point of a function. In this way, they don't need explici...
How to check if a python module exists without importing it
...lse
To find dotted imports, you need to do more:
import imp
try:
spam_info = imp.find_module('spam')
spam = imp.load_module('spam', *spam_info)
imp.find_module('eggs', spam.__path__) # __path__ is already a list
found = True
except ImportError:
found = False
You can also use pk...
Passing Data between View Controllers
...ndViewController.delegate = self
}
}
func userDidEnterInformation(info: String) {
label.text = info
}
}
Note the use of our custom DataEnteredDelegate protocol.
Second View Controller and Protocol
The code for the second view controller is
import UIKit
// protocol ...
What is the purpose of mock objects?
...u can simulate your database using a mock object in your unit tests. This frees you from the burden of having to set up and tear down a real database, just to test a single method in your class.
The word "Mock" is sometimes erroneously used interchangeably with "Stub." The differences between the...
How to convert array to SimpleXML
...)
)
generated XML would be as:
<?xml version="1.0"?>
<student_info>
<total_stud>500</total_stud>
<student>
<id>1</id>
<name>abc</name>
<address>
<city>Pune</city>
<z...
How to pass arguments and redirect stdin from a file to program run in gdb?
...ollowing:
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
.................................................
Type "apropos word" to search for commands related to "word"...
Reading symbols from projectExecutablename...done.
(gdb)
Before you start your...
How to check internet access on Android? InetAddress never times out
...n other situations where there's no available network), cm.getActiveNetworkInfo() will be null, so you need to add a null check.
Modified (Eddie's solution) below:
public boolean isOnline() {
ConnectivityManager cm =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);...
Broadcast receiver for checking internet connection in android app
...gt;.
It will respond to only one action instead of two. See here for more information.
Answer to your second question (you want receiver to call only one time if internet connection available):
Your code is perfect; you notify only when internet is available.
UPDATE
You can use this method to c...
Why does Twitter Bootstrap Use Pixels for Font Size?
... about to dismiss an entire framework, most specifically something that is free to use and free to modify based solely on a few issues!
Heck, in one project, I lifted parts of Foundation and parts of Bootstrap and added my own custom code - that's the beauty of open source.
...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
...e an ssh public key already made. help.github.com/mac-set-up-git for more info on doing so with mac.
– Ryan
Dec 28 '11 at 0:08
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