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Randomize a List
...best way to randomize the order of a generic list in C#? I've got a finite set of 75 numbers in a list I would like to assign a random order to, in order to draw them for a lottery type application.
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How do you deal with configuration files in source control?
...default, and then if the override file is present, loads that and uses any settings from the override in preference to the default file.
In general, the smaller the override file the better, but it can always contain more settings for a developer with a very non-standard environment.
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The tilde operator in Python
...an be useful sometimes, e.g., below ~ operator is used to cleanse your dataset and return you a column without NaN.
from numpy import NaN
import pandas as pd
matrix = pd.DataFrame([1,2,3,4,NaN], columns=['Number'], dtype='float64')
# Remove NaN in column 'Number'
matrix['Number'][~matrix['Number']...
Show a popup/message box from a Windows batch file
...d line parameters.
Something like the following saved in MessageBox.vbs:
Set objArgs = WScript.Arguments
messageText = objArgs(0)
MsgBox messageText
Which you would call like:
cscript MessageBox.vbs "This will be shown in a popup."
MsgBox reference if you are interested in going this route.
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How do I select elements of an array given condition?
...'],
dtype='|S1')
And equivalent way to do this is with np.all() by setting the axis argument appropriately.
>>> output = y[np.all([x > 1, x < 5], axis=0)] # desired output is ['o','o','a']
>>> output
array(['o', 'o', 'a'],
dtype='|S1')
by the numbers:
>&g...
How to use SSH to run a local shell script on a remote machine?
... ARG1=$ARG1 ARG2=$ARG2 'bash -s' <<'ENDSSH'...
In this case we are setting ARG1 and ARG2 to local values. Sending everything after user@host as the remote_command. When the remote machine executes the command ARG1 and ARG2 are set the local values, thanks to local command line evaluation, w...
Best practice to call ConfigureAwait for all server-side code
...d the default behavior discard context if in a library? Or have a compiler setting for the default context behavior? Both of these were rejected because it's harder to just read the code and tell what it does.
– Stephen Cleary
May 8 '14 at 20:32
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How do you view ALL text from an ntext or nvarchar(max) in SSMS?
... This value defaults to 256. Increase this value to display larger result sets without truncation. The maximum value is 8,192.
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What resources are shared between threads?
...at:
processes are typically independent, while threads exist as subsets of a
process
processes carry considerable state information, whereas multiple threads
within a process share state as well
as memory and other resources
processes have separate address spaces, whereas threads s...
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
...sword
sqlplus / as sysdba
(Replace system-password with the password you set for the SYS and SYSTEM users during the Oracle XE installation.)
The first of these three connect via the TNS listener, but the second two connect directly to the database without going via the listener, and only work if...