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Create a Path from String in Java7
...know that from Java 11 onward, there is a static method in Path class that allows to do this straight away:
With all the path in one String:
Path.of("/tmp/foo");
With the path broken down in several Strings:
Path.of("/tmp","foo");
...
How to add column if not exists on PostgreSQL?
...UE;
END;
$BODY$
LANGUAGE 'plpgsql';
usage:
select add_column('public', 'foo', 'bar', 'varchar(30)');
Parsing query strings on Android
...ort org.eclipse.jetty.util.*;
URL url = new URL("www.example.com/index.php?foo=bar&bla=blub");
MultiMap<String> params = new MultiMap<String>();
UrlEncoded.decodeTo(url.getQuery(), params, "UTF-8");
assert params.getString("foo").equals("bar");
assert params.getString("bla").equals(...
difference between use and require
... not having to reconcile collisions is a good point, and more generally there's a programming style which says "namespaces are a honking great idea, we should have more of them" (from "The Zen of Python") -- so e.g. that style recommends not using "using namespace foo;" in C++, so that reade...
In Python how should I test if a variable is None, True or False
...
a = 'foo' if a: print 'its true' a is not actually TRUE, it's just not none
– wesm
Apr 3 '15 at 21:06
...
Access parent URL from iframe
...le to pass messages using postMessage(...), but other JS APIs are intentionally made inaccessible.
It's also still possible to get the URL depending on the context. See other answers for more details.
share
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do { … } while (0) — what is it good for? [duplicate]
...ter, and still use within an if statement. An example might help:
#define FOO(x) foo(x); bar(x)
if (condition)
FOO(x);
else // syntax error here
...;
Even using braces doesn't help:
#define FOO(x) { foo(x); bar(x); }
Using this in an if statement would require that you omit the semico...
Best way to load module/class from lib folder in Rails 3?
...
# Autoload lib/ folder including all subdirectories
config.autoload_paths += Dir["#{config.root}/lib/**/"]
Source: Rails 3 Quicktip: Autoload lib directory including all subdirectories, avoid lazy loading
Please mind that files contained in the lib folder...
Why exactly is eval evil?
I know that Lisp and Scheme programmers usually say that eval should be avoided unless strictly necessary. I’ve seen the same recommendation for several programming languages, but I’ve not yet seen a list of clear arguments against the use of eval . Where can I find an account of the potentia...
What does principal end of an association means in 1:1 relationship in Entity framework
... so in your case you should use:
public class Boo
{
[Key, ForeignKey("Foo")]
public string BooId{get;set;}
public Foo Foo{get;set;}
}
Or fluent mapping
modelBuilder.Entity<Foo>()
.HasOptional(f => f.Boo)
.WithRequired(s => s.Foo);
...