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How do I use a custom deleter with a std::unique_ptr member?
...uplicator's approach, which has the same advantages (inlining deletion, no extra storage on each unique_ptr, no need to provide an instance of the deleter when constructing), and adds the benefit of being able to use std::unique_ptr<Bar> anywhere without needing to remember to use the special ...
How do I modify fields inside the new PostgreSQL JSON datatype?
..._build_object('<key>', '<value>')
Where <key> should be string, and <value> can be whatever type to_jsonb() accepts.
For setting a value deep in a JSON hierarchy, the jsonb_set() function can be used:
SELECT jsonb_set('{"a":[null,{"b":[]}]}', '{a,1,b,0}', jsonb '{"c":3}')
--...
MVC 4 Razor File Upload
...
Clarifying it.
Model:
public class ContactUsModel
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string Email { get; set; }
public string Phone { get; set; }
public HttpP...
Troubleshooting “Illegal mix of collations” error in mysql
...
This is generally caused by comparing two strings of incompatible collation or by attempting to select data of different collation into a combined column.
The clause COLLATE allows you to specify the collation used in the query.
For example, the following WHERE cla...
Best way to combine two or more byte arrays in C#
...sion requires creating an array of the byte arrays first, which introduces extra inefficiency.
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Delete file from internal storage
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String dir = getFilesDir().getAbsolutePath();
File f0 = new File(dir, "myFile");
boolean d0 = f0.delete();
Log.w("Delete Check", "File deleted: " + dir + "/myFile " + d0);
The code File dir = getFilesDir(); doesn't work be...
The JPA hashCode() / equals() dilemma
...lds for business ID instead, but generally that's not the case
private String screenName;
private String email;
// I don't put UUID generation in constructor for performance reasons.
// I call setUuid() when I create a new entity
public User() {
}
// This method is onl...
invalid_grant trying to get oAuth token from google
...untered the same problem. For me, I fixed this by using Email Address (the string that ends with ...@developer.gserviceaccount.com) instead of Client ID for client_id parameter value. The naming set by Google is confusing here.
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Why aren't superclass __init__ methods automatically invoked?
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Often the subclass has extra parameters which can't be passed to the superclass.
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Javascript set img src
...on't need to construct a whole new image... the src attribute just takes a string value :-)
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