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Unique Key constraints for multiple columns in Entity Framework
...
EF 6 and below:
First approach:
dbContext.Database.ExecuteSqlCommand(string.Format(
@"CREATE UNIQUE INDEX LX_{0} ON {0} ({1})",
"Entitys", "FirstColumn, SecondColumn"));
This approach is very fast and useful but the main problem is th...
Send POST request using NSURLSession
...configuration delegate:self delegateQueue:nil];
NSURL *url = [NSURL URLWithString:@"[JSON SERVER"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
...
Pass a PHP array to a JavaScript function [duplicate]
...y); ?>, ...)
In cases where you need to parse out an object from JSON-string (like in an AJAX request), the safe way is to use JSON.parse(..) like the below:
var s = "<JSON-String>";
var obj = JSON.parse(s);
sha...
PHP常用API函数用法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...] => id=289
[5] => pc_hash=c6svGs
)
语法：
explode(separator, string,limit)
参数
描述
separator
必需。规定在哪里分割字符串。
string
必需。要分割的字符串。
limit
可选。规定所返回的数组元素的最大...
How to automate createsuperuser on django?
...peruser('admin', 'admin@example.com', 'adminpass')"
This doesn't uses an extra echo, this has the benefit that you can pass it to a docker container for execution. Without the need to use sh -c "..." which gets you into quote escaping hell.
And remember that first comes username, than the email.
...
Performing user authentication in Java EE / JSF using j_security_check
...getRequest(). You can also just invalidate the session altogether.
public String logout() {
FacesContext.getCurrentInstance().getExternalContext().invalidateSession();
return "login?faces-redirect=true";
}
For the remnant (defining users, roles and constraints in deployment descriptor and...
How to create a fixed-size array of objects
...
This question has already been answered, but for some extra information at the time of Swift 4:
In case of performance, you should reserve memory for the array, in case of dynamically creating it, such as adding elements with Array.append().
var array = [SKSpriteNode]()
array....
How to Create Deterministic Guids
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This will convert any string into a Guid without having to import an outside assembly.
public static Guid ToGuid(string src)
{
byte[] stringbytes = Encoding.UTF8.GetBytes(src);
byte[] hashedBytes = new System.Security.Cryptography
...
How to check if all list items have the same value and return it, or return an “otherValue” if they
...etty clear, short, covers all the cases, and does not unnecessarily create extra iterations of the sequence.
Making this into a generic method that works on IEnumerable<T> is left as an exercise. :-)
share
|
...
advantage of tap method in ruby
... some_method
...
some_object.serialize
some_object
end
we can save extra line:
def some_method
...
some_object.tap{ |o| o.serialize }
end
In some situation this technique can save more then one line and make code more compact.
...