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What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
Will console.log reduce JavaScript execution performance?
...r something, anyone with little knowledge on using the developer tools can read your debug messages. Depending on what you are logging, this may not be a desirable behavior.
One of the best approaches is to wrap the console.log in one of your methods, and where you can check for conditions and exec...
Differences between hard real-time, soft real-time, and firm real-time?
I have read the definitions for the different notions of real-time , and the examples provided for hard and soft real-time systems make sense to me. But, there is no real explanation or example of a firm real-time system. According to the link above:
...
Heroku 'Permission denied (publickey) fatal: Could not read from remote repository' woes
...
I know this has already been answered. But I would like to add my solution as it may helpful for others in the future..
A common key error is: Permission denied (publickey). You can fix this by using keys:add to notify Heroku of your new key....
Decoding JSON using json.Unmarshal vs json.NewDecoder.Decode
...ule of thumb is this:
Use json.Decoder if your data is coming from an io.Reader stream, or you need to decode multiple values from a stream of data.
Use json.Unmarshal if you already have the JSON data in memory.
For the case of reading from an HTTP request, I'd pick json.Decoder since you're ob...
Using an RDBMS as event sourcing storage
...cumented on Greg's website.
The schema of his prototypical "Events" table reads:
Table Events
AggregateId [Guid],
Data [Blob],
SequenceNumber [Long],
Version [Int]
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Is there a way to loop through a table variable in TSQL without using a cursor?
...
[Edit] Because I probably skipped the word "variable" when I first time read the question, here is an updated response...
declare @databases table
(
PK int IDENTITY(1,1),
DatabaseID int,
Name varchar(15),
Server varchar(15)
)
-- insert a bunch rows...
How do I split a multi-line string into multiple lines?
...string literals always use a '\n' EOL, regardless of platform. So do files read in text mode.
– efotinis
Oct 6 '08 at 16:55
16
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How do I execute a string containing Python code in Python?
...e any string with double underscores you are safe. Maybe...
It is hard to read and understand
From http://stupidpythonideas.blogspot.it/2013/05/why-evalexec-is-bad.html (emphasis mine):
First, exec makes it harder to human beings to read your code. In order to figure out what's happening, I don't ...
How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
...ng Node.js.
lsbom -f -l -s -pf /var/db/receipts/org.nodejs.pkg.bom | while read f; do sudo rm /usr/local/${f}; done
sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*
UPDATE: 23 SEP 2016
If you're afraid of running these commands...
Thanks to jguix for th...