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How do you find the disk size of a Postgres / PostgreSQL table and its indexes
... and index size in terms of bytes/MB/GB/etc , or even better the size for all tables. In Oracle I had a nasty long query that looked at user_lobs and user_segments to give back an answer.
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What is the difference between JVM, JDK, JRE & OpenJDK?
...hat contain the bytecodes understood by the JVM. It's also the entity that allows Java to be a "portable language" (write once, run anywhere). Indeed, there are specific implementations of the JVM for different systems (Windows, Linux, macOS, see the Wikipedia list), the aim is that with the same by...
How do I add files and folders into GitHub repos?
...en git add *
Then use git commit -m "<Message>" to commit files
Finally git push -u origin master to push files.
When you make modifications run git status which gives you the list of files modified, add them using git add * for everything or you can specify each file individually, then git...
Why doesn't JavaScript support multithreading?
...because this would cause massive concurrency issues in existing web pages. All Chrome does is separate multiple components (different tabs, plug-ins, etcetera) into separate processes, but I can’t imagine a single page having more than one JavaScript thread.
You can however use, as was suggested,...
linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... prot opt source destination
Chain RH-Firewall-1-INPUT (0 references)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 ...
Can the :not() pseudo-class have multiple arguments?
I'm trying to select input elements of all type s except radio and checkbox .
5 Answers
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Changing API level Android Studio
...fileTree(dir: 'libs', include: ['*.jar'])
}
Sync gradle button (refresh all gradle projects also works)
For beginners in Android Studio "Sync gradle button" is located in
Tools -> Android -> Sync Project with Gradle Files "Rebuild project"
Build -> Rebuild Project
Rebuild pro...
Git Push error: refusing to update checked out branch
...
Actually, you can push to a non-bare repository just fine, you just can't push to the one branch that is currently checked out.
– Nowhere man
Feb 14 '13 at 15:18
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What are the differences between Chosen and Select2?
...o be loaded as option tags in the DOM, which limits it to working with
small-ish datasets. Select2 uses a function to find results
on-the-fly, which allows it to partially load results.
Paging of results: Since Select2 works with large datasets and only loads a small amount of matching results...
How to mark-up phone numbers?
I want to mark up a phone number as callable link in an HTML document. I have read the microformats approach , and I know, that the tel: scheme would be standard, but is quite literally nowhere implemented.
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