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How to check status of PostgreSQL server Mac OS X
...uld get something like this:
$ show-pg-status
pg_ctl: server is running (PID: 11030)
/usr/local/Cellar/postgresql/9.2.4/bin/postgres
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HTTP Content-Type Header and JSON
I have always been trying to avoid using most of the HTTP protocol's properties for the sake of fear of the unknown.
4 Answ...
Why does ~True result in -2?
...is not surprising if True means 1 and ~ means bitwise inversion...
...provided that
True can be treated as an integer and
integers are represented in Two's complement
Edits:
fixed the mixing between integer representation and bitwise inversion operator
applied another polishing (the shorte...
Rebasing remote branches in Git
... their work on your contributions to the code base, and if you later on decide to move that content from one place to another (rebase it) and push those changes, then other people will get problems and have to rebase their code. Now imagine you have 1000 developers :) It just causes a lot of unneces...
How to keep index when using pandas merge
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Nice! To avoid explicitly specifying the index-name I use a.reset_index().merge(b, how="left").set_index(a.index.names).
– Truls
Dec 8 '17 at 9:21
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Is there a way to make ellipsize=“marquee” always scroll?
...with is to create a new class derived from TextView.
The class should override three methods onFocusChanged, onWindowFocusChanged and isFocused to make the TextView all focused.
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
if(focused)
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Command to change the default home directory of a user
... similar to chsh which changes the default login shell of an existing valid user) without touching the /etc/passwd file. Thanks
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Git reset --hard and push to remote repository
...tailed instructions on how to disable denyNonFastForwards using vi are provided on this SO post: stackoverflow.com/a/43721579/2073804
– ron190
May 1 '17 at 23:18
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Assigning a variable NaN in python without numpy
...because two things that are "not a number" cannot (strictly speaking) be said to be equal to one another -- see What is the rationale for all comparisons returning false for IEEE754 NaN values? for more details and information.
Instead, use math.isnan(...) if you need to determine if a value is Na...
Detecting iOS / Android Operating system
...des on a page, I'd like to detect the current operating system (Apple/Android/Other[not supported]) and modify my elements based on that value.
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