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Best way to find the intersection of multiple sets?
...hon version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expansion
Note that set.intersection is not a static method, but this uses the fun...
When should you use constexpr capability in C++11?
It seems to me that having a "function that always returns 5" is breaking or diluting the meaning of "calling a function". There must be a reason, or a need for this capability or it wouldn't be in C++11. Why is it there?
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How to wait for several Futures?
...d (f1Result, f2Result, f3Result)
In this example, futures 1, 2 and 3 are kicked off in parallel. Then, in the for comprehension, we wait until the results 1 and then 2 and then 3 are available. If either 1 or 2 fails, we will not wait for 3 anymore. If all 3 succeed, then the aggFut val will ho...
How to assign an exec result to a sql variable?
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I always use the return value to pass back error status. If you need to pass back one value I'd use an output parameter.
sample stored procedure, with an OUTPUT parameter:
CREATE PROCEDURE YourStoredProcedure
(
@Param1 int
,@Param2 varchar(5)
,@P...
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
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They take up different amounts of space and they have different ranges of acceptable values.
Here are the sizes and ranges of values for SQL Server, other RDBMSes have similar documentation:
MySQL
Postgres
Oracle (they just have ...
Table header to stay fixed at the top when user scrolls it out of view with jQuery
.... For example, the table may be 500 pixels down from the page, how do I make it so that if the user scrolls the header out of view (browser detects its no longer in the windows view somehow), it will stay put at the top? Anyone can give me a Javascript solution to this?
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Add SUM of values of two LISTS into new LIST
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tomtom
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What is an example of the Liskov Substitution Principle?
I have heard that the Liskov Substitution Principle (LSP) is a fundamental principle of object oriented design. What is it and what are some examples of its use?
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drag drop files into standard html file input
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The following works in Chrome and FF, but i've yet to find a solution that covers IE10+ as well:
// dragover and dragenter events need to have 'preventDefault' called
// in order for the 'drop' event to register.
// See: https://devel...
Set operations (union, intersection) on Swift array?
..."}
If you're using custom structs, you need to implement Hashable.
Thanks to Michael Stern in the comments for the Swift 2.0 update.
Thanks to Amjad Husseini in the comments for the Hashable info.
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