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AWS Error Message: A conflicting conditional operation is currently in progress against this resourc
... mine. I did not need to change the name and I couldn't change it as I was set on it - it had to match my already existing domain name for a static website that I was looking to host. Anyway, in less than 30 minutes it was created automatically.
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Disable messages upon loading a package
...OCR) that I need to load in my R environment. Upon loading the package, a set of messages are printed. This is ordinarily fine, but since the output of my R script is being used for further analysis I want to completely disable all of this output. How do I do that? Furthermore, I'd prefer to do ...
How does a Linux/Unix Bash script know its own PID?
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If the process is a child process and $BASHPID is not set, it is possible to query the ppid of a created child process of the running process. It might be a bit ugly, but it works. Example:
sleep 1 &
mypid=$(ps -o ppid= -p "$!")
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Should I avoid 'async void' event handlers?
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@AlexHopeO'Connor: The Handled flag must be set synchronously; it's not possible to use async to make a decision on whether the event is handled or not.
– Stephen Cleary
Nov 5 '18 at 13:00
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Is there any way to view the currently mapped keys in Vim?
...sion to a file and then edit this file as it contains all the mappings and settings.
:mks[ession] [file] - Write a Vim script that restores the current editing
session.
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When should I mock?
...g expected exceptions within tests.
A mock replaces that dependency. You set expectations on calls to the dependent object, set the exact return values it should give you to perform the test you want, and/or what exceptions to throw so that you can test your exception handling code. In this way y...
CSS: how to add white space before element's content?
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/* Most Accurate Setting if you only want
to do this with CSS Pseudo Element */
p:before {
content: "\00a0";
padding-right: 5px; /* If you need more space b/w contents */
}
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warning: implicit declaration of function
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@Flimm, C99 and C89/C90 has different setting for this
– How Chen
Jan 15 '15 at 6:06
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How to select first and last TD in a row?
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The following rule sets the style of all P elements that are children of BODY: body > P { line-height: 1.3 } You can see at: w3.org/TR/CSS2/selector.html#child-selectors (same page posted by James)
– Francesco
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Random row selection in Pandas dataframe
...n integer random_state, equivalent to using np.ramdom.seed. So, instead of setting, for example, np.random.seed = 0, you can:
df = df.sample(n=k, random_state=0)
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