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Python: try statement in a single line
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Some people abuse the short-circuiting behavior of or to do this. This is error prone, so I never use it.
c = None
b = [1, 2]
a = c or b
Consider the following case:
c = []
b = [1, 2]
a = c or b
In this case, a probably should be [], but it is [1, 2] because [] is false in a boolean context. ...
Swift compiler error: “non-modular header inside framework module”
...I would like to migrate my ObjC framework to Swift and I got the following error:
20 Answers
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Strange SQLAlchemy error message: TypeError: 'dict' object does not support indexing
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I wish they would of updated that error message, every time I get it I end up landing on this page and answer
– oshi2016
Mar 16 '17 at 5:46
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Call An Asynchronous Javascript Function Synchronously
...y rejects you can wrap it in a try catch or skip the try catch and let the error propagate to the async/await functions catch call. You should be careful not to leave promise errors unhandled especially in Node.js. Below are some examples that show off how errors work.
function timeoutReject (t...
How to unload a package without restarting R
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> detach("package:MASS", unload=TRUE) Error in detach("package:MASS", unload = TRUE) : invalid 'name' argument
– Mona Jalal
Feb 12 '14 at 2:39
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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...eversely (primary to secondary and vice versa) and we are getting the same error.
so please check in the configuration settings for database status which may help you.
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Working copy locked error in tortoise svn while committing
...from a few days I'm not able to commit the changes and I get the following error whenever I try to commit.
10 Answers
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PostgreSQL error 'Could not connect to server: No such file or directory'
Like some others I am getting this error when I run rake db:migrate in my project or even try most database tasks for my Ruby on Rails 3.2 applications.
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ElasticSearch: Unassigned Shards, how to fix?
..., something else is probably wrong, so look in your Elasticsearch logs for errors. If you see EsRejectedExecutionException your thread pools may be too small.
Finally, you can explicitly reassign a shard to a node with the reroute API.
# Suppose shard 4 of index "my-index" is unassigned, so you wa...
What does the “assert” keyword do? [duplicate]
...tement
assert cond;
is equivalent to
if (!cond)
throw new AssertionError();
If you launch your program without this option, the assert statement will have no effect.
For example, assert d >= 0 && d <= s.length();, as posted in your question, is equivalent to
if (!(d >= 0...