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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ch other; one of them successfully INSERTs; the other gets a duplicate key error and does an UPDATE instead. The UPDATE blocks waiting for the INSERT to rollback or commit. When it rolls back, the UPDATE condition re-check matches zero rows, so even though the UPDATE commits it hasn't actually done ...
Android App Not Install. An existing package by the same name with a conflicting signature is alread
...ith signed key, now while im trying to install that build in it through an error ::: An existing pacakage by the same name with a conflicting signature is already installed . And not getting installed too . Kindly help .
– Tarit Ray
Apr 19 '19 at 12:52
...
Javascript !instanceof If Statement
...or.
if (obj !instanceof Array) {
// do something
}
This is a syntax error. Operators such as != are a single operator, as opposed to a NOT applied to an EQUALS. There is no such operator as !instanceof in the same way as there is no !< operator.
...
Should I check in node_modules to git when creating a node.js app on Heroku?
... the Node.js buildpack source for these exact steps
However, the original error looks to be an incompatibility between the versions of npm and node. It is a good idea to always explicitly set the engines section of your packages.json according to this guide to avoid these types of situations:
{
...
How can I check whether a numpy array is empty or not?
...ting with a 'empty' array, and growing with np.append is a frequent novice error.
Using a list in if alist: hinges on its boolean value:
In [102]: bool([])
Out[102]: False
In [103]: bool([1]) ...
“VT-x is not available” when i start my Virtual machine [closed]
I have created a virtual machine using the VMWare software and getting an error while starting the Virtual Machine. It says "VT-x is not available:
...
RestSharp simple complete example [closed]
...rying to following the code from here stum.de/2009/12/22/… but I get the error which I described on my original question above.
– Nil Pun
Apr 19 '12 at 12:27
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Laravel migration: unique key is too long, even if specified
...ng to migrate a users table in Laravel. When I run my migration I get this error:
38 Answers
...
python assert with and without parenthesis
...foo == 8, \
"derp should be 8, it is " + str(foo)
Prints:
AssertionError: "derp should be 8, it is 7
Why does this python assert have to be different from everything else:
I think the pythonic ideology is that a program should self-correct without having to worry about the special flag to...
What is Haskell used for in the real world? [closed]
...ation is a really nice feature:
Even if something would usually cause an error, it will still work as long as you don't use the result. For example, you could put 1 / 0 as the first item of a list and it will still work if you only used the second item.
It is easier to write search programs such a...