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cannot convert data (type interface {}) to type string: need type assertion
...Even if i is an interface type, []i is not interface type. As a result, in order to convert []i to its value type, we have to do it individually:
// var items []i
for _, item := range items {
value, ok := item.(T)
dosomethingWith(value)
}
Performance
As for performance, it can be slower ...
Create a CSV File for a user in PHP
... to create the CSV, but miss a basic part of the question: how to link. In order to link to download of the CSV-file, you just link to the .php-file, which in turn responds as being a .csv-file. The PHP headers do that. This enables cool stuff, like adding variables to the querystring and customize ...
What is duck typing?
...that do not have strong typing.
The idea is that you don't need a type in order to invoke an existing method on an object - if a method is defined on it, you can invoke it.
The name comes from the phrase "If it looks like a duck and quacks like a duck, it's a duck".
Wikipedia has much more inform...
Sending websocket ping/pong frame from browser
...quite essential for the client application to regularly ping the server in order to ensure the connection has not been lost.
– Noel Abrahams
May 19 '16 at 10:08
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Does Spring @Transactional attribute work on a private method?
...the target class will be 'weaved' (i.e. its byte code will be modified) in order to turn @Transactional into runtime behavior on any kind of method.
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Python Script execute commands in Terminal
...ything. It's way safer. subprocess.call() will get you a nice interface in order to replace the simple call form.
– Jorge Vargas
Mar 24 '11 at 20:35
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
..., running it through a substitution cipher then storing it in reverse byte order :-).
However, implementation-defined does have a specific meaning in the ISO standards - the implementation must document how it works. So even UNIX, which can put anything it likes into argv[0] with the exec family of...
'Contains()' workaround using Linq to Entities?
...hat I used to generate some e-sql from a collection, YMMV:
string[] ids = orders.Select(x=>x.ProductID.ToString()).ToArray();
return CurrentDataSource.Products.Where("it.ID IN {" + string.Join(",", ids) + "}");
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Returning IEnumerable vs. IQueryable
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This is very useful information in order to understand the difference, but the top answer is more accurate as the question was "when should one be preferred over the other?", and not "what is the difference?".
– Scopperloit
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NULL values inside NOT IN clause
...Logic can be a bit confusing at first but it is essential to understand in order to write correct queries in TSQL
Another article I would recommend is SQL Aggregate Functions and NULL.
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