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MySQL: determine which database is selected?
...ncluded in this or not. On a technical level, it is a holdover from Oracle and can safely be removed. If you are inclined, you can use the following instead:
SELECT DATABASE();
That said, it is perhaps important to note, that while FROM DUAL does not actually do anything, it is valid MySQL syntax...
Creating an empty file in Ruby: “touch” equivalent?
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FileUtils.touch looks like what it does, and mirrors* the touch command:
require 'fileutils'
FileUtils.touch('file.txt')
* Unlike touch(1) you can't update mtime or atime alone. It's also missing a few other nice options.
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Postgresql SELECT if string contains
...concatenated, no chance for SQL injection.
– Erwin Brandstetter
Apr 27 '14 at 10:48
1
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Java: How to Indent XML Generated by Transformer
I'm using Java's built in XML transformer to take a DOM document and print out the resulting XML. The problem is that it isn't indenting the text at all despite having set the parameter "indent" explicitly.
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ImportError: No module named six
...culprit; no deps were followed. Installing the pypi version, uninstalling, and then installing the git+ version pulled in the necessary dependencies, though this seems silly.
– tsbertalan
Sep 23 '18 at 3:58
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How to pass parameters using ui-sref in ui-router to controller
I need to pass and recieve two parameters to the state I want to transit to using ui-sref of ui-router.
3 Answers
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INSERT INTO … SELECT FROM … ON DUPLICATE KEY UPDATE
... before the equals references the columns named in the INSERT INTO clause, and the second part references the SELECT columns.
INSERT INTO lee(exp_id, created_by, location, animal, starttime, endtime, entct,
inact, inadur, inadist,
smlct, smldur, smldist,
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What does “#pragma comment” mean?
...atures. For example, (I believe) Microsoft started the "#pragma once" deal and it was only in MS products, now I'm not so sure.
Pragma Directives It includes "#pragma comment" in the table you'll see.
HTH
I suspect GCC, for example, has their own set of #pragma's.
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How to enable C++11 in Qt Creator?
The title is pretty self-descriptive. I've downloaded Qt Creator 2.7.0, and I am trying to compile some basic C++11 code:
6...
How to see which flags -march=native will activate?
...get doesn't display CPU cache information, of which the methods both elias and 42n4 below have listed. Specifically, on gcc 4.9.2 on a Phenom, the output includes these: --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512
– Daniel Santos
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