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How do I find the last occurrence of a substring in an NSString?

How would I get the last occurrence of an NSString within another NSString? For example, in "abc def ghi abc def ghi," I want to find the index of the second "abc," not the first. I know I could do this with a bunch of rangeOfStrings, but is there already a function for that? ...
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How to get the original value of an attribute in Rails

is there a way to get the original value that an ActiveRecord attribute (=the value that was loaded from the database)? 4 A...
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Distinct not working with LINQ to Objects

This is based on an example in "LINQ in Action". Listing 4.16. 9 Answers 9 ...
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How do I combine two data frames?

I'm using Pandas data frames. I have a initial data frame, say D . I extract two data frames from it like this: 6 Answers ...
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Why is Cache-Control attribute sent in request header (client to server)?

After reading about the Cache-Control field of the HTTP header, 3 Answers 3 ...
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How do I use the includes method in lodash to check if an object is in the collection?

lodash lets me check for membership of basic data types with includes : 3 Answers 3 ...
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How to undo 'git reset'?

What's the simplest way to undo the 4 Answers 4 ...
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Are different ports on the same server considered cross-domain? (Ajax-wise)

Can XMLHttpRequest send a request to http:// mydomain.com:81/ from http:// mydomain.com/ ? 1 Answer ...
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Why is Attributes.IsDefined() missing overloads?

Inspired by an SO question. The Attribute class has several overloads for the IsDefined() method. Covered are attributes applied to Assembly, Module, MemberInfo, ParameterInfo. The MemberInfo overload covers PropertyInfo, FieldInfo, EventInfo, MethodInfo, ConstructorInfo. ...
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How can I modify the size of column in a MySQL table?

I have created a table and accidentally put varchar length as 300 instead of 65353 . How can I fix that? 2 Answers ...