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Is it fine to have foreign key as primary key?
...the foreign key refers will always be valid (or null, if allowed).
http://www.aisintl.com/case/primary_and_foreign_key.html
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Use String.split() with multiple delimiters
... for normal cases it would be .split("match1|match2"), (eg. split("https|http")), \\ is to escape the special char . in above case
– prayagupd
Sep 14 '18 at 22:17
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How do you check if a JavaScript Object is a DOM Object?
... contrast, this answer works for HTML well as SVG.
See it in action here: https://jsfiddle.net/eLuhbu6r/
function isElement(element) {
return element instanceof Element || element instanceof HTMLDocument;
}
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How to correctly use the extern keyword in C
...icle that I came about the extern keyword, along with the examples: http://www.geeksforgeeks.org/understanding-extern-keyword-in-c/
Though I do not agree that using extern in function declarations is redundant. This is supposed to be a compiler setting. So I recommend using the extern in the functi...
Is asynchronous jdbc call possible?
... of the operations and a different API there are solutions. One example is https://github.com/jasync-sql/jasync-sql that works for MySQL and PostgreSQL.
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In a javascript array, how do I get the last 5 elements, excluding the first element?
...arr2.slice(1).slice(-5);
Another way to do it would be using lodash https://lodash.com/docs#rest - that is of course if you don't mind having to load a huge javascript minified file if your trying to do it from your browser.
_.slice(_.rest(arr), -5)
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Should all Python classes extend object?
...ollow this for any future code in Python 3.
class Foo:
pass
Source: https://docs.python.org/3/tutorial/classes.html#class-objects
Example quote:
Class objects support two kinds of operations: attribute references
and instantiation.
Attribute references use the standard syntax used...
How to execute XPath one-liners from shell?
...use namespace add it to -qs like this: '-qs:declare namespace mets="http://www.loc.gov/METS/";/mets:mets/mets:dmdSec'
– igo
Aug 24 '16 at 12:26
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How can I find WPF controls by name or type?
...l sub-trees also. See Josh Smith's post linked in the blog post.
Source:
https://code.google.com/p/gishu-util/source/browse/#git%2FWPF%2FUtilities
Explanatory blog post :
http://madcoderspeak.blogspot.com/2010/04/wpf-find-child-control-of-specific-type.html
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SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY
...ode types as a special case. See code below.
For further information see: https://msdn.microsoft.com/en-us/library/ms176106.aspx
SELECT
c.name 'Column Name',
t.name,
t.name +
CASE WHEN t.name IN ('char', 'varchar','nchar','nvarchar') THEN '('+
CASE WHEN c.max_length=-1 T...