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psql: FATAL: role “postgres” does not exist
...ep is to check the missing role: What is the output within psql of the command \du ? On my Ubuntu system the relevant line looks like this:
List of roles
Role name | Attributes | Member of
-----------+-----------------------------------+-------...
How to access the GET parameters after “?” in Express?
...e value I'm looking for.
req.params refers to items with a ':' in the URL and req.query refers to items associated with the '?'
Example:
GET /something?color1=red&color2=blue
Then in express, the handler:
app.get('/something', (req, res) => {
req.query.color1 === 'red' // true
...
pinterest api documentation [closed]
...ate a log in action to the /v3/login endpoint with your Pinterest username and password. It will return an access_token if request is successful. I'm not going into details about how this is done, as this is never meant to be part of the public API and is meant only for users logging into Pinterest ...
How can I get a file's size in C? [duplicate]
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You need to seek to the end of the file and then ask for the position:
fseek(fp, 0L, SEEK_END);
sz = ftell(fp);
You can then seek back, e.g.:
fseek(fp, 0L, SEEK_SET);
or (if seeking to go to the beginning)
rewind(fp);
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Printing newlines with print() in R
.../program F=filename")
File not supplied.
Usage: ./program F=filename>
and
> cat("File not supplied.\nUsage: ./program F=filename","\n")
File not supplied.
Usage: ./program F=filename
>
The reason print() doesn't do what you want is that print() shows you a version of the object from th...
How do I run a batch script from within a batch script?
...ile.bat
This will block (pause) the execution of the current batch file, and it will wait until the CALLed one completes.
If you don't want it to block, use START instead.
Get the nitty-gritty details by using CALL /? or START /? from the cmd prompt.
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T-SQL CASE Clause: How to specify WHEN NULL
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Handling it with something like this may be of use, or something of the like: COALESCE(last_name, '') The case statement, while concise, is imho less maintainable than COALESCE in large queries. In the end, you have the...
css 'pointer-events' property alternative for IE
...nu when clicked on) while others should navigate (these dont have dropdown and navigate directly).However, both types have href defined to them
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Displaying better error message than “No JSON object could be decoded”
...one.com (Python 3.7.3) shows that the stdlib json library has been updated and gives the new error message format. I don’t have time to track exact releases right now however.
– Martijn Pieters♦
Mar 14 at 0:29
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pandas DataFrame: replace nan values with average of columns
I've got a pandas DataFrame filled mostly with real numbers, but there is a few nan values in it as well.
10 Answers
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