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How do I find Waldo with Mathematica?
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My guess at a "bulletproof way to do this" (think CIA finding Waldo in any satellite image any time, not just a single image without competing elements, like striped shirts)... I would train a Boltzmann machine on many images...
Validating parameters to a Bash script
...| die "Directory $dir does not exist"
rm -rf "$dir"
done <<EOF
~/myfolder1/$1/anotherfolder
~/myfolder2/$1/yetanotherfolder
~/myfolder3/$1/thisisafolder
EOF
edit: I missed the part about checking if the directories exist at first, so I added that in, completing the script. Also, have a...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...cent versions of Objective-C and Clang have a modern syntax for this:
if (myDictionary[myKey]) {
}
You do not have to check for equality with nil, because only non-nil Objective-C objects can be stored in dictionaries(or arrays). And all Objective-C objects are truthy values. Even @NO, @0, and [...
Changing password with Oracle SQL Developer
Many of my users do not use SQLPlus. I cannot give them alter user. We expire passwords every 60 days.
14 Answers
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Protected methods in Objective-C
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Here is what I did to get protected methods visible to my subclasses, without requiring them to implement the methods themselves. This meant I didn't get compiler warnings in my subclass about having an incomplete implementation.
SuperClassProtectedMethods.h (protocol file):
@p...
Node.js Mongoose.js string to ObjectId function
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mongoose.Types.ObjectId(id) but my id is undefined then what it will return ? new id or error
– Keval Bhatt
Dec 17 '15 at 9:14
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UITapGestureRecognizer tap on self.view but ignore subviews
...er object to all of them. I found this method below how to make gesture on my view and I know how it works. Right now I am in front of handicap which way to choose for create this recognizer ignoring subview. Any ideas? Thanks.
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External resource not being loaded by AngularJs
...ng to load a video that is on a remote server but came across an issue. In my JSON, the URL is entered as a plain HTTP URL.
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Delete topic in Kafka 0.8.1.1
... am not sure about that "messy up" thing. Because once I delete a topic on my company server, the deletion generate lots of junk to zookeeper log. But I can not reproduce it in my local. So I do not recommend that..
– Liang
Dec 15 '14 at 18:45
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how to ignore namespaces with XPath
My goal is to extract certain nodes from multiple xml files with multiple namespaces using XPath. Everything works fine as long as i know the namespace URIs. The namespace name itself remains constant, but the Schemas (XSD) are sometimes client-generated i.e. unknown to me. Then i am left with basic...