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Fast way to discover the row count of a table in PostgreSQL
...s in big tables is known to be slow in PostgreSQL. To get a precise number it has to do a full count of rows due to the nature of MVCC. There is a way to speed this up dramatically if the count does not have to be exact like it seems to be in your case.
Instead of getting the exact count (slow with...
How to get diff working like git-diff?
I like the output formatting of git diff . The color and the + / - representation of changes between lines is easier to read than GNU diff.
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What does ^M character mean in Vim?
I keep getting ^M character in my vimrc and it breaks my configuration.
15 Answers
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Compare two objects in Java with possible null values
I want to compare two strings for equality when either or both can be null .
12 Answers
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What are the differences between various threading synchronization options in C#?
...eat question. I maybe wrong.. Let me try.. Revision#2 of my orig answer.. with a little bit of more understanding. Thanks for making me read :)
lock(obj)
is a CLR construct that for (intra-object?) thread synchronization. Ensures that only one thread can take ownership of the object's lock &...
How do I create an empty array/matrix in NumPy?
...t to create an empty array (or matrix) and then add one column (or row) to it at a time.
13 Answers
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Fastest way to tell if two files have the same contents in Unix/Linux?
...l check file size first. Here's the GNU version, if you want to see the additional optimizations it includes: git.savannah.gnu.org/cgit/diffutils.git/tree/src/cmp.c
– Ryan Graham
Apr 6 '18 at 2:00
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How to add a “open git-bash here…” context menu to the windows explorer?
...a right click) menu to the windows explorer that, when clicked, opens the git-bash console in the current explorer folder?
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CSS \9 in width property
What is the meaning of this? I am guessing it is a browser hack, but I have not been able to find what exactly it does.
4 A...
Copy paste text into iOS simulator
This must be documented somewhere, but I can't find it.
16 Answers
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