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Add a “hook” to all AJAX requests on a page
...uest.callbacks.push( callback );
} else {
// create a callback queue
XMLHttpRequest.callbacks = [callback];
// store the native send()
oldSend = XMLHttpRequest.prototype.send;
// override the native send()
XMLHttpRequest.prototype.send = function()...
Multiple Updates in MySQL
...thod still has to run each individually query, which takes time, though it batches the results in memory, or something, while executing. The TRANSACTION method is also pretty expensive in both replication and query logs.
Even worse, the CASE method was 41.1x slower than the INSERT method w/ 30,000 ...
Using Node.JS, how do I read a JSON file into (server) memory?
...
This is a sound solution for small DevOps scripts or batch operations. You have to balance human time with performance. As far as something you can commit to memory and use quickly for these appropriate cases, this is is tops. Not every task involves Big Data™ and hostile exe...
How to import CSV file data into a PostgreSQL table?
... This could be a way to write data but it is super slow even with batch and good computing power. Using CSVs is a good way to accomplish this.
– Ankit Singh
Jul 13 '18 at 14:09
...
How do I put a bunch of uncommitted changes aside while working on something else
...is no longer required and mercurial will in fact freak out over it.
Patch queue the items using mq. This isn't too dissimilar to shelve in some respects, but behaves differently. The end result is the same, changes are removed and can be optionally re-applied later. When pushed, the patches are log...
How do I disable log messages from the Requests library?
By default, the Requests python library writes log messages to the console, along the lines of:
12 Answers
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How to output MySQL query results in CSV format?
...
mysql --batch, -B
Print results using tab as the column separator, with each row on a
new line. With this option, mysql does not use the history file.
Batch mode results in non-tabular output format and escaping of
special...
How to update two tables in one statement in SQL Server 2005?
... make sure that two UPDATE statements are treated atomically. You can also batch them to avoid a round trip.
BEGIN TRANSACTION;
UPDATE Table1
SET Table1.LastName = 'DR. XXXXXX'
FROM Table1 T1, Table2 T2
WHERE T1.id = T2.id
and T1.id = '011008';
UPDATE Table2
SET Table2.WAprrs = 'start,stop'
FR...
“is” operator behaves unexpectedly with integers
...>> a == 1000 # Test integers like this,
True
>>> a != 5000 # or this!
True
>>> a is 1000 # Don't do this! - Don't use `is` to test integers!!
False
Explanation
To know this, you need to know the following.
First, what does is do? It is a comparison opera...
How to drop a PostgreSQL database if there are active connections to it?
I need to write a script that will drop a PostgreSQL database. There may be a lot of connections to it, but the script should ignore that.
...