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Dump a mysql database to a plaintext (CSV) backup from the command line
...ysqldump since that outputs in a form that is only convenient for mysql to read. CSV seems more universal (one file per table is fine). But if there are advantages to mysqldump, I'm all ears. Also, I'd like something I can run from the command line (linux). If that's a mysql script, pointers to ...
OpenJDK availability for Windows OS [closed]
...customers or even have them install it themselves for production purposes? Read here. The GitHub binaries seem to have much clearer terms.
– Casey B.
Jan 14 '17 at 1:59
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insert multiple rows via a php array into mysql
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I know this is an old query, but I was just reading and thought I'd add what I found elsewhere:
mysqli in PHP 5 is an ojbect with some good functions that will allow you to speed up the insertion time for the answer above:
$mysqli->autocommit(FALSE);
$mysqli->m...
What is the difference between And and AndAlso in VB.NET?
...it doesn't check if y is 7, because it knows that the condition is false already. (This is called short-circuiting.)
Generally people use the short-circuiting method if there's a reason to explicitly not check the second part if the first part is not true, such as if it would throw an exception if ...
What do the terms “CPU bound” and “I/O bound” mean?
...ile for some data might become I/O bound, since the bottleneck is then the reading of the data from disk (actually, this example is perhaps kind of old-fashioned these days with hundreds of MB/s coming in from SSDs).
share
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How does the HyperLogLog algorithm work?
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Didn't quite understand the paper until I read this. Now it makes sense.
– josiah
Dec 9 '14 at 22:00
5
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Is Task.Result the same as .GetAwaiter.GetResult()?
I was recently reading some code that uses a lot of async methods, but then sometimes needs to execute them synchronously. The code does:
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Python: How to get stdout after running os.system? [duplicate]
...ocess
p = subprocess.Popen(["pwd"], stdout=subprocess.PIPE)
out = p.stdout.read()
print out
Or as a function (using shell=True was required for me on Python 2.6.7 and check_output was not added until 2.7, making it unusable here):
def system_call(command):
p = subprocess.Popen([command], stdo...
Advantages of Binary Search Trees over Hash Tables
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Hash tables in general have better cache behavior requiring less memory reads compared to a binary tree. For a hash table you normally only incur a single read before you have access to a reference holding your data. The binary tree, if it is a balanced variant, requires something in the order of...
Entity Framework: There is already an open DataReader associated with this Command
...single connection (or single command with multiple selects) while next DataReader is executed before first one has completed the reading. The only way to avoid the exception is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this always happens is when ...