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Sending a message to nil in Objective-C
...e to nil " means - let alone how it is actually useful. Taking an excerpt from the documentation:
11 Answers
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What are detached, persistent and transient objects in hibernate?
...ce, one can detach an instance by calling session.evict(). This removes it from being managed by Hibernate (thus prevent changes to the instance from being automatically propagated back to the db). You can send changes to the db via session.update(), and re-attach it with session.merge().
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How to read multiple text files into a single RDD?
I want to read a bunch of text files from a hdfs location and perform mapping on it in an iteration using spark.
10 Answers...
How to use multiple AWS Accounts from the command line?
...46053/1199564) because it allows a user to understand how to move settings from one profile to another if, for example, you started out with only the default profile and want to continue with dedicated, separate profiles.
– mgd
Mar 14 '18 at 8:24
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Stop UIWebView from “bouncing” vertically?
Does anyone know how to stop a UIWebView from bouncing vertically? I mean when a user touches their iphone screen, drags their finger downwards, and the webview shows a blank spot above the web page I had loaded?
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Python loop that also accesses previous and next values
...lement, and end iterating at the last-but-one element. So index should run from 1 ... (l-1), not 0 ... l as you have here, and no need for the special-cased if-clauses. Btw, there is a parameter enumerate(..., start=1) but not for end. So we don't realy want to use enumerate().
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Printing HashMap In Java
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keySet() only returns a set of keys from your hashmap, you should iterate this key set and the get the value from the hashmap using these keys.
In your example, the type of the hashmap's key is TypeKey, but you specified TypeValue in your generic for-loop, so...
How to check if an email address exists without sending an email?
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VRFY user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain>
If the user doesn't exist, you'll get a 5.1.1 DSN. However, just because the email is not rejected, does not mean the user exists. Some server will silently discard requests like t...
How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
...s some more info on using them:
https://chrislea.com/2013/03/15/upgrading-from-node-js-0-8-x-to-0-10-0-from-my-ppa/
I currently intend to keep maintaining these unless the Joyent folks start maintaining their own repositories. They have me on IM so I'm generally quite aware of when new releases ar...
How do you get a directory listing sorted by creation date in python?
...te: to sort dirpath's entries by modification date in Python 3:
import os
from pathlib import Path
paths = sorted(Path(dirpath).iterdir(), key=os.path.getmtime)
(put @Pygirl's answer here for greater visibility)
If you already have a list of filenames files, then to sort it inplace by creation ...