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Any good boolean expression simplifiers out there? [closed]
I was refactoring old code and encountered several IF conditions that were way too complex and long and I'm certain they can be simplified. My guess is that those conditions grew so much because of later modifications.
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scp with port number specified
...lt
The lowercase p switch is used with scp for the preservation of times and modes.
Here is an excerpt from scp's man page with all of the details concerning the two switches, as well as an explanation of why uppercase P was chosen for scp:
-P port Specifies the port to connect to on the r...
How to test an SQL Update statement before running it?
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In addition to using a transaction as Imad has said (which should be mandatory anyway) you can also do a sanity check which rows are affected by running a select using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
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What is string_view?
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The purpose of any and all kinds of "string reference" and "array reference" proposals is to avoid copying data which is already owned somewhere else and of which only a non-mutating view is required. The string_view in question is one such pro...
Remove .php extension with .htaccess
Yes, I've read the Apache manual and searched here. For some reason I simply cannot get this to work. The closest I've come is having it remove the extension, but it points back to the root directory. I want this to just work in the directory that contains the .htaccess file.
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Python nested functions variable scoping [duplicate]
...his line:
_total += PRICE_RANGES[key][0]
The documentation about Scopes and Namespaces says this:
A special quirk of Python is that – if no global statement is in effect – assignments to names always go into the innermost scope. Assignments do not copy data — they just bind names to ob...
How to deal with persistent storage (e.g. databases) in Docker
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Docker 1.9.0 and above
Use volume API
docker volume create --name hello
docker run -d -v hello:/container/path/for/volume container_image my_command
This means that the data-only container pattern must be abandoned in favour of the ne...
using facebook sdk in Android studio
I'm following Facebook SDK for Android using Android Studio . When I run my application I'm getting the below mentioned warning.
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Round to 5 (or other number) in Python
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I don't know of a standard function in Python, but this works for me:
Python 2
def myround(x, base=5):
return int(base * round(float(x)/base))
Python3
def myround(x, base=5):
return base * round(x/base)
It is easy to see why the a...
HttpSecurity, WebSecurity and AuthenticationManagerBuilder
...plain when to override configure(HttpSecurity) , configure(WebSecurity) and configure(AuthenticationManagerBuilder) ?
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