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Get record counts for all tables in MySQL database
...ount FROM my_schema.host UNION
SELECT "ndb_binlog_index" AS table_name, COUNT(*) AS exact_row_count FROM my_schema.ndb_binlog_index UNION
Copy and paste except for the last UNION to get nice output like,
+------------------+-----------------+
| table_name | exact_r...
Android preferences onclick event
...o use onPreferenceTreeClick event.
For example see http://www.javased.com/index.php?source_dir=platform_packages_apps_phone/src/com/android/phone/MobileNetworkSettings.java
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
/**...
Fastest way to extract frames using ffmpeg?
...is is about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fp...
Reading specific lines only
... understand the meaning of big file. The loop will take years to reach the index
– devssh
Jun 6 '18 at 10:27
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Search for all files in project containing the text 'querystring' in Eclipse
...rk in Dreamweaver and Eclipse when developing. I think Dreamweaver has a really nice search where you can search for text within all files of your current project.
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Mongoose's find method with $or condition does not work properly
...
According to mongoDB documentation: "...That is, for MongoDB to use indexes to evaluate an $or expression, all the clauses in the $or expression must be supported by indexes."
So add indexes for your other fields and it will work. I had a similar problem and this solved it.
You can read m...
Is it possible to use JavaScript to change the meta-tags of the page?
...lector('meta[name=theme-color]'); meta.setAttribute("content", colors[slideIndex]); Chrome on Android detects the update and changes the color
– Dominic Bartl
Dec 20 '18 at 10:00
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What is the difference between the | and || or operators?
...lways used || (two pipes) in OR expressions, both in C# and PHP. Occasionally I see a single pipe used: | . What is the difference between those two usages? Are there any caveats when using one over the other or are they interchangeable?
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How can I use grep to show just filenames on Linux?
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Nice, I personally like using this with other flags grep -nrl "some text" . when looking for text in a set of subfolders recursively
– openwonk
Jun 25 '19 at 6:33
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What is the difference between window, screen, and document in Javascript?
...t model. You can access it as window
window.screen or just screen is a small information object about physical screen dimensions.
window.document or just document is the main object of the potentially visible (or better yet: rendered) document object model/DOM.
Since window is the global object ...