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How to remove a key from a Python dictionary?
When deleting a key from a dictionary, I use:
13 Answers
13
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SQL update from one Table to another based on a ID match
...
I believe an UPDATE FROM with a JOIN will help:
MS SQL
UPDATE
Sales_Import
SET
Sales_Import.AccountNumber = RAN.AccountNumber
FROM
Sales_Import SI
INNER JOIN
RetrieveAccountNumber RAN
ON
SI.LeadID = RAN.LeadID;
MySQL and...
Terminating a script in PowerShell
...nsole window in v3 or v4, which I use. Well, it will if you run the script from explorer, but no matter how you end the script it will do that. If running from a PowerShell command window it does not close the window.
– Joshua Nurczyk
Jan 20 '15 at 7:05
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Tactics for using PHP in a high-load site
...straight.
If it takes a long time to build your comments and article data from the db, integrate memcache into your system. You can cache the query results and store them in a memcached instance. It's important to remember that retrieving the data from memcache must be faster than assembling it fro...
What is the difference between the 'COPY' and 'ADD' commands in a Dockerfile?
...identity, gzip, bzip2 or xz) then it is unpacked as a directory. Resources from remote URLs are not decompressed.
Note that the Best practices for writing Dockerfiles suggests using COPY where the magic of ADD is not required. Otherwise, you (since you had to look up this answer) are likely to ge...
How to retrieve an element from a set without removing it?
...equire copying the whole set:
for e in s:
break
# e is now an element from s
Or...
e = next(iter(s))
But in general, sets don't support indexing or slicing.
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Create a submodule repository from a folder and keep its git commit history
...epository for this demo application and make it a subpackage submodule from main repository without losing its commit history.
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How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
...hing. It marks "child" entity to be removed when it's no longer referenced from the "parent" entity, e.g. when you remove the child entity from the corresponding collection of the parent entity.
ON DELETE CASCADE is a database-specific thing, it deletes the "child" row in the database when the "par...
How to make Git “forget” about a file that was tracked but is now in .gitignore?
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.gitignore will prevent untracked files from being added (without an add -f) to the set of files tracked by git, however git will continue to track any files that are already being tracked.
To stop tracking a file you need to remove it from the index. This can be ...
Is Zookeeper a must for Kafka?
...roducer and multiple consumers (each consumer getting its own copy of data from the broker). Given this, I do not want the overhead of using Zookeeper; Can I not just use the broker only? Why is a Zookeeper must?
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