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Fast way to discover the row count of a table in PostgreSQL
...acy depends on more factors:
Distribution of row size. If a given block happens to hold wider than usual rows, the count is lower than usual etc.
Dead tuples or a FILLFACTOR occupy space per block. If unevenly distributed across the table, the estimate may be off.
General rounding errors.
In mos...
How to install Xcode Command Line Tools
...o longer available through Xcode. Instead they must be downloaded from the Apple Developer Tools site: https://developer.apple.com/downloads/index.action. This requires signing in with a developer account.
Or via terminal (from the release docs): The Command Line Developer Tools package can be inst...
What is the difference between ManualResetEvent and AutoResetEvent in .NET?
...ted, much more comprehensive, and easy to understand, run-to-learn console app snippet below.
Just run the examples on two different consoles, and observe behaviour. You will get much more clear idea there what is happening behind the scenes.
Manual Reset Event
using System;
using System.Threadin...
What is a .pid file and what does it contain?
...enario as well as any other scenario I can think of. I suspect they either appeared before procfs did or they're used as portability tool because procfs interfaces are different on e.g. Solaris are quite different from that on Linux.
– Shnatsel
Aug 28 '13 at 15...
Vertically centering Bootstrap modal window
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Ok this solution appears to work great (except that it stops me from closing the modals by clicking out of them). But somehow it makes some of my e2e tests with protractor fail (and I can't find the reason why, it does not feel like it is a b...
Can you control how an SVG's stroke-width is drawn?
Currently building a browser-based SVG application. Within this app, various shapes can be styled and positioned by the user, including rectangles.
...
How to use conditional breakpoint in Eclipse?
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Thanks, appreciate it
– user195488
Apr 4 '13 at 0:22
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No visible cause for “Unexpected token ILLEGAL”
...U+200B characters. It seems the tool uses that character to control word-wrapping on long strings.
UPDATE 2013-01-07
After the latest jsfiddle update, it's now showing the character as a red dot like codepen does. Apparently, it's also not inserting U+200B characters on its own anymore, so this pro...
Breakpoints are crossed out, how can I make them valid?
...re encountering what I encounter about once per year with Eclipse. There's apparently a bug in eclipse that causes this "Skip All Breakpoints" feature to turn ON all by itself even though you didn't actually turn it on.
– user2080225
May 11 '17 at 15:42
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How to convert TimeStamp to Date in Java?
...classes that are now legacy, supplanted by the modern java.time classes.
Apparently you are storing a moment in your database in a column of some integer type. That is unfortunate. You should instead be using a column of a type such as the SQL-standard TIMESTAMP WITH TIME ZONE. But, for this Answe...