C++ defines no such type as uint. This must be “your” type, i.e. a type defined in your code or some third party library. One can guess that it is the same as unsigned int. Could be unsigned long int though or something else. Anyway, you have to check it yourself. It is a matter … Read more
I’ve got two one liners. Given: >>> letters = [‘a’,’b’,’c’,’d’,’e’,’f’,’g’,’h’,’i’,’j’] Use enumerate to get index, add ‘x’ every 3rd letter, eg: mod(n, 3) == 2, then concatenate into string and list() it. >>> list(”.join(l + ‘x’ * (n % 3 == 2) for n, l in enumerate(letters))) [‘a’, ‘b’, ‘c’, ‘x’, ‘d’, ‘e’, ‘f’, ‘x’, … Read more
Most relational databases structure indices as B-trees. If a table has a clustering index, the data pages are stored as the leaf nodes of the B-tree. Essentially, the clustering index becomes the table. For tables w/o a clustering index, the data pages of the table are stored in a heap. Any non-clustered indices are B-trees … Read more
I am adding this answer as I was looking for a solution and didn’t find one. This may not answer exactly this question or may be, but will help lot of others out there like me. Example. If the field with null is houseName and it is of type string, the solution can be like … Read more
Angularjs documentation is full of examples, you just need to take some time and explore it. See this example here : ngRepeat example , it’s the same case. <ul> <li ng-repeat=”question in questions | filter: {questionTypesId: questionType, selected: true}”> <div> <span class=”name”> {{$index + 1}} {{ question.questionText }} </span> </div> <ul> <li ng-repeat=”answer in question.answers”> … Read more
The value of indexes is in speeding reads. For instance, if you are doing lots of SELECTs based on a range of dates in a date column, it makes sense to put an index on that column. And of course, generally you add indexes on any column you’re going to be JOINing on with any … Read more
The .Insert() method on List<T> is exactly for this purpose: someList.Insert(2, someValue); This would modify the someList collection to insert someValue at index 2, pushing other values up one index. More information here.
CouchDB and MongoDB definitely yes. I mentioned that in my book: http://use-the-index-luke.com/sql/testing-scalability/response-time-throughput-scaling-horizontal Here are the respective docs: http://guide.couchdb.org/draft/btree.html http://www.mongodb.org/display/DOCS/Indexes NoSQL is, however, too fragmented to give a definite “yes, all NoSQL systems need indexes”, I believe. Most systems require and provide indexes but not at level most SQL databases do. Recently, the Cassandra people were … Read more
Strictly speaking it has been always possible in Code First Migrations because you can run sql in a migration: public partial class AddIndexes : DbMigration { private const string IndexName = “IX_LogSamples”; public override void Up() { Sql(String.Format(@”CREATE NONCLUSTERED INDEX [{0}] ON [dbo].[Logs] ([SampleId],[Date]) INCLUDE ([Value])”, IndexName)); } public override void Down() { DropIndex(“dbo.Logs”, IndexName); … Read more
A covering index is not the same as a composite index. If I have 2 separate indexes one on col3 and the other on col4, Which one of them will be used in this query ? The index with the highest cardinality. MySQL keeps statistics on which index has what properties. The index that has … Read more