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How do I implement an Objective-C singleton that is compatible with ARC?
... @Olie: False, because client code can do [[MyClass alloc] init] and bypass the sharedInstance access. DongXu, you should look at Peter Hosey's Singleton article. If you're going to override allocWithZone: to prevent more instances from being created, you also should override init to prevent t...
Just what is an IntPtr exactly?
...ent amounts of supported memory, it doesn't always take the same number of bytes to hold that number, so we call a "native size integer" one that can hold a pointer on any particular system.
– Sam Harwell
Jul 18 '09 at 18:24
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Error: “The node to be inserted is from a different document context”
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
How can I use grep to find a word inside a folder?
...relative line number in the file
'yourString*' String for search, followed by a wildcard character
-r Recursively search subdirectories listed
. Directory for search (current directory)
grep -nr 'MobileAppSer*' . (Would find MobileAppServlet.java or MobileAppServlet.class o...
Android List Preferences: have summary as selected value?
I have a Preference activity which uses a List Preferences as defined by my XML file. How would I set the summary of the list activity to the value that is selected?
...
How to remove focus without setting focus to another control?
... can then just do
LinearLayout myLayout = (LinearLayout) activity.findViewById(R.id.my_layout);
myLayout.requestFocus();
Requesting focus did nothing unless I set the view to be focusable.
share
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
...o "Please answer yes or no.";;
esac
done
Another method, pointed out by Steven Huwig, is Bash's select command. Here is the same example using select:
echo "Do you wish to install this program?"
select yn in "Yes" "No"; do
case $yn in
Yes ) make install; break;;
No ) exit;...
Ways to save Backbone.js model data?
...e are a few ways to do so. For example, you can set up your model instance by passing in a JSON OR use method called set() which takes a JSON object of attributes.
myDonut = new Donut({'flavor':'lemon', 'price':'0.75'});
mySecondHelping = new Donut();
mySecondHelping.set({'flavor':'plain', 'price':...
Should I hash the password before sending it to the server side?
...bly re-generate) an authentication "key" based on the original text chosen by the user. In an ideal world this text should immediately generate a "key" by hashing it using irreversible salt. This salt should be unique to the user credential being generated. This "key" will be what your systems us...
How do you bind an Enum to a DropDownList control in ASP.NET?
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By the way in C#, you can't access to Array with index itemNames[i], you only could do it with arrayObject.GetValue(i) and in that way, it's returning just the name in both cases.
– Javiere
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