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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
I have a table with existing data. Is there a way to add a primary key without deleting and re-creating the table?
4 Answer...
How to set standard encoding in Visual Studio
... are not being saved as UTF-8? All of my .cs, .csproj, .sln, .config, .as*x, etc, all save as UTF-8 (with signature, the byte order marks), by default.
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How to see if an NSString starts with a certain other string?
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Try this: if ([myString hasPrefix:@"http"]).
By the way, your test should be != NSNotFound instead of == NSNotFound. But say your URL is ftp://my_http_host.com/thing, it'll match but shouldn't.
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How to create a temporary directory?
...ary directory with a random name and makes sure that file doesn't already exist. You need to remember to delete the directory after using it though.
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Why use 'virtual' for class properties in Entity Framework model definitions?
...ottgu/archive/2010/07/16/code-first-development-with-entity-framework-4.aspx
7 Answers
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HashMap get/put complexity
..., that worst case scenario doesn't come up very often in real life, in my experience. So no, O(1) certainly isn't guaranteed - but it's usually what you should assume when considering which algorithms and data structures to use.
In JDK 8, HashMap has been tweaked so that if keys can be compared for...
What is the JavaScript >>> operator and how do you use it?
...st convert non-Numbers to Number, it converts them to Numbers that can be expressed as 32-bit unsigned ints.
Although JavaScript's Numbers are double-precision floats(*), the bitwise operators (<<, >>, &, | and ~) are defined in terms of operations on 32-bit integers. Doing a bitwis...
Changing the size of a column referenced by a schema-bound view in SQL Server
...bably created using the WITH SCHEMABINDING option and this means they are explicitly wired up to prevent such changes. Looks like the schemabinding worked and prevented you from breaking those views, lucky day, heh? Contact your database administrator and ask him to do the change, after it asserts t...
c++11 Return value optimization or move? [duplicate]
...should use std::move and when I should let the compiler optimize... for example:
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How to display gpg key details without importing it?
...sa4096 2012-12-26 [S] [revoked: 2014-03-26]
sub rsa2048 2013-01-23 [S] [expires: 2023-01-21]
sub rsa2048 2013-01-23 [E] [expires: 2023-01-21]
sub rsa4096 2014-03-26 [S] [expires: 2020-09-03]
sub rsa4096 2014-03-26 [E] [expires: 2020-09-03]
sub rsa4096 2014-11-22 [A] [revoked: 2016-03-01]
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