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Check if page gets reloaded or refreshed in JavaScript
...ome had recently change this behavior. When user click current address bar and hit enter, the value of performance.navigation.type will be 1 which should be 0. I tested in Version 56. Not sure why.
– Jackwin tung
Feb 19 '17 at 9:28
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
...
How Pony (ORM) does its tricks?
...nerator into SQL query in three steps:
Decompiling of generator bytecode and rebuilding generator AST
(abstract syntax tree)
Translation of Python AST into "abstract SQL" -- universal
list-based representation of a SQL query
Converting abstract SQL representation into specific
database-dependent S...
Calculate difference in keys contained in two Python dictionaries
Suppose I have two Python dictionaries - dictA and dictB . I need to find out if there are any keys which are present in dictB but not in dictA . What is the fastest way to go about it?
...
Change an HTML5 input's placeholder color with CSS
...here are three different implementations: pseudo-elements, pseudo-classes, and nothing.
WebKit, Blink (Safari, Google Chrome, Opera 15+) and Microsoft Edge are using a pseudo-element: ::-webkit-input-placeholder. [Ref]
Mozilla Firefox 4 to 18 is using a pseudo-class: :-moz-placeholder (one colon)....
Query to list number of records in each table in a database
...
If you're using SQL Server 2005 and up, you can also use this:
SELECT
t.NAME AS TableName,
i.name as indexName,
p.[Rows],
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(...
How can i query for null values in entity framework?
...If this bug has affected you too, please visit the bug report on UserVoice and let Microsoft know that this bug has affected you as well.
Edit: This bug is being fixed in EF 4.5! Thanks everyone for upvoting this bug!
For backwards compatibility, it will be opt-in - you need manually enable a s...
Faye vs. Socket.IO (and Juggernaut)
Socket.IO seems to be the most popular and active WebSocket emulation library. Juggernaut uses it to create a complete pub/sub system.
...
PHP Pass by reference in foreach [duplicate]
...e, the last array item takes the current loop value: 'zero', 'one', 'two', and then it's just 'two'... : )
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Using do block vs braces {}
... is a bit old question but I would like to try explain a bit more about {} and do .. end
like it is said before
bracket syntax has higher precedence order than do..end
but how this one makes difference:
method1 method2 do
puts "hi"
end
in this case, method1 will be called with the bloc...