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What's the best way to join on the same table twice?
...erever I could see tables needing to join to each other. Why is this a bad idea?
– volume one
Dec 15 '14 at 1:10
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Insert a commit before the root commit in Git?
...ou did...)
work well with multiple branches with guaranteed results
The idea behind it is to:
Create a new empty commit far in the past
Replace the old root commit by a commit exactly similar except that the new root commit is added as a parent
Verify that all is as expected and run git filter-...
Functional, Declarative, and Imperative Programming [closed]
...en mentioned together. the reason for this is a consequence of taking the idea of functional programming "to the extreme". a function, in it's purest sense, is something from maths - a kind of "black box" that takes some input and always gives the same output. and that kind of behaviour doesn't r...
Javascript reduce on array of objects
... my method over the other top answer in this thread as I disagree with the idea that passing an optional parameter to reduce with a magic number to get out a number primitive is cleaner. It may result in fewer lines written but imo it is less readable.
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select * vs select column
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It's probably a bad idea to use column order in general just for code readability's sake, doubly bad to use SELECT * with it.
– Lèse majesté
Jul 5 '10 at 15:31
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Using an RDBMS as event sourcing storage
...cation needed "CREATE" permissions (which generally speaking is not a good idea... generally, there's always exceptions/exclusions) or each time a new entity/object came into existence or was deployed, new storage containers/tables/collections needed to be made. We found this was painfully slow for ...
Postgres and Indexes on Foreign Keys and Primary Keys
...he referencing table for
rows matching the old value, it is often a good idea to index the
referencing columns. Because this is not always needed, and there are
many choices available on how to index, declaration of a foreign key
constraint does not automatically create an index on the refer...
With arrays, why is it the case that a[5] == 5[a]?
...may well have gotten it from even earlier languages (CPL? Algol?).
So the idea that array indexing is defined in terms of addition, and that addition, even of a pointer and an integer, is commutative, goes back many decades, to C's ancestor languages.
Those languages were much less strongly typed ...
What does JVM flag CMSClassUnloadingEnabled actually do?
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Not sure how this affects the idea of using UseConcatSweepGC, but it appears there was a bug recently fixed in CMSClassUnloadingEnabled. It is remarked as fixed here: bugs.sun.com/bugdatabase/view_bug.do?bug_id=8000325
– Bill Rosmus
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Simultaneously merge multiple data.frames in a list
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yes. whenever i have an idea, i always check if @hadley has already done it, and most of the times he has :-)
– Ramnath
Nov 11 '11 at 15:33
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