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What are the disadvantages of using persistent connection in PDO
...database. Unless you have identified creating database connections as the one thing that is a bottleneck in your script (this means you've done code profiling using xdebug and/or xhprof), you should not consider persistent connections as a solution to anything.
Further, most modern databases (incl...
Comparing object properties in c# [closed]
...g.cs
Original answer:
The limitations I see in your code:
The biggest one is that it doesn't do a deep object comparison.
It doesn't do an element by element comparison in case properties are lists or contain lists as elements (this can go n-levels).
It doesn't take into account that some typ...
How do I disable fail_on_empty_beans in Jackson?
...r class, try @JsonSerialize above class declaration.
For a mapper, here's one example:
ObjectMapper mapper = new ObjectMapper();
mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
// do various things, perhaps:
String someJsonString = mapper.writeValueAsString(someClassInstance);
S...
What are the best practices for catching and re-throwing exceptions?
...ss you intend to do something meaningful.
"Something meaningful" might be one of these:
Handling the exception
The most obvious meaningful action is to handle the exception, e.g. by displaying an error message and aborting the operation:
try {
$connect = new CONNECT($db, $user, $password, $d...
Bootstrap 3 collapsed menu doesn't close on click
...nd bootstrap, see the answer of @raisercostin).
– RomOne
Feb 15 '17 at 0:54
@RomOne This answer is correct. Bootstrap ...
What does threadsafe mean?
...”
“…and the need for a shared piece of data to be accessed by only one
thread at any given time.”
Definitely worth a read!
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MySQL - UPDATE query based on SELECT Query
...
You can actually do this one of two ways:
MySQL update join syntax:
UPDATE tableA a
INNER JOIN tableB b ON a.name_a = b.name_b
SET validation_check = if(start_dts > end_dts, 'VALID', '')
-- where clause can go here
ANSI SQL syntax:
UPDATE tab...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
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With SQLite, the first one is much much slower than La Voie's version when there is no index on the matched column (i.e. "home"). (Tested with 24k rows resulting in 13k rows)
– Thomas Tempelmann
Apr 30 '15 at ...
Execute unit tests serially (rather than in parallel)
...ll of them down and restart them whenever a new service is added or an old one is removed.
11 Answers
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How fast is D compared to C++?
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One big thing that slows D down is a subpar garbage collection implementation. Benchmarks that don't heavily stress the GC will show very similar performance to C and C++ code compiled with the same compiler backend. Benchm...