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What is cardinality in MySQL?
...ow.
Cardinality is a property which affects the ability to cluster, sort and search data. It is therefore an important measurement for the query planners in DBs, it is a heuristic which they can use to choose the best plans.
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Build and Version Numbering for Java Projects (ant, cvs, hudson)
What are current best-practices for systematic build numbering and version number management in Java projects? Specifically:
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How to get screen width without (minus) scrollbar?
I have an element and need it's width without(!) vertical scrollbar.
8 Answers
8
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Explicitly set Id with Doctrine when using “AUTO” strategy
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Thank you and I'm happy to help a bit as I can :)
– nicolasbui
Dec 5 '12 at 18:20
2
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How can I handle the warning of file_get_contents() function in PHP?
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Step 1: check the return code: if($content === FALSE) { // handle error here... }
Step 2: suppress the warning by putting an error control operator (i.e. @) in front of the call to file_get_contents():
$content = @file_get_contents($site);
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AngularJS - placeholder for empty result from filter
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The problem is that the "Nothing here!" part is shown and hidden really quickly. When you get data with an ajax request there is an delay before the returned data is shown and in that time you can see the "Nothing here!" part appear and disappear.
– Temega
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How to set a bitmap from resource
...rameter, Resources, is required. It is normally obtainable in any Context (and subclasses like Activity).
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Inner join vs Where
...="T2"."ID"))
-- 2 table access full table1
-- 3 table access full table2
And the execution plan for the query using a WHERE clause.
-- with where clause
EXPLAIN PLAN FOR
SELECT * FROM table1 t1, table2 t2
WHERE t1.id = t2.id;
SELECT *
FROM TABLE (DBMS_XPLAN.DISPLAY);
-- 0 select statement
-- 1...
How to get current time in milliseconds in PHP?
...endt, I think you are confusing with time(). microtime(true) on the other hand returns the current time in seconds since the Unix epoch accurate to the nearest microsecond (see PHP reference). It's actually very easy to test if you run the above code in a loop and display the milliseconds.
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Java ByteBuffer to String
... (2018): The edited sibling answer by @xinyongCheng is a simpler approach, and should be the accepted answer.
Your approach would be reasonable if you knew the bytes are in the platform's default charset. In your example, this is true because k.getBytes() returns the bytes in the platform's default...