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How to determine an interface{} value's “real” type?
...
Your example does work. Here's a simplified version.
package main
import "fmt"
func weird(i int) interface{} {
if i < 0 {
return "negative"
}
return i
}
func main() {
var i = 42
if w, ok := weird(7).(int); ok {
i += w
...
How do you create a static class in C++?
...
If you're looking for a way of applying the "static" keyword to a class, like you can in C# for example, then you won't be able to without using Managed C++.
But the looks of your sample, you just need to create a public sta...
Rails has_and_belongs_to_many migration
...rom the docs:
There is also a generator which will produce join tables if JoinTable
is part of the name:
Your migration file (note the :id => false; it's what prevents the creation of a primary key):
Rails 3
class CreateRestaurantsUsers < ActiveRecord::Migration
def self.up
c...
Does disposing streamreader close the stream?
...ng streams when you call Dispose on them. They don't dispose of the stream if the reader/writer is just garbage collected though - you should always dispose of the reader/writer, preferrably with a using statement. (In fact, none of these classes have finalizers, nor should they have.)
Personally I...
Send POST request using NSURLSession
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@sendoa , if you know how to how to upload a image along with thr "plain" data? i need the solution urgent. many thanks in advance
– Gagan Joshi
Jul 24 '14 at 12:27
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Creating a URL in the controller .NET MVC
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If you just want to get the path to a certain action, use UrlHelper:
UrlHelper u = new UrlHelper(this.ControllerContext.RequestContext);
string url = u.Action("About", "Home", null);
if you want to create a hyperlink:
str...
How are people managing authentication in Go? [closed]
...null
)
When a user logs in to your site via a POST under TLS, determine if the password is valid.
Then issue a random session key, say 50 or more crypto rand characters and stuff in a secure Cookie.
Add that session key to the UserSession table.
Then when you see that user again, first hit the Us...
mongodb count num of distinct values per field/key
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this doesn't really work if your number of distinct values is too high... if you were looking at distinct names of people in the world or something. do you have an answer that scales?
– underrun
Oct 1 '14 at 18:...
Programmatically go back to the previous fragment in the backstack
...n().replace(R.id.content_frame,fragment).addToBackStack("tag").commit();" if you write addToBackStack(null) , it will handle it by itself but if you give a tag , you should handle it manually.
– Khaled Saif
Dec 8 '15 at 11:14
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CMake output/build directory
...ome complicated 50 lines of CMake script in order to make a program for 3 different compilers. This probably concludes all my knowledge in CMake.
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