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Why are only final variables accessible in anonymous class?
...used in an anonymous inner class or lambda expression though.
It's basically due to the way Java manages closures.
When you create an instance of an anonymous inner class, any variables which are used within that class have their values copied in via the autogenerated constructor. This avoids th...
Anatomy of a “Memory Leak”
... seen is in Chapter 7 of the free Foundations of Programming e-book.
Basically, in .NET a memory leak occurs when referenced objects are rooted and thus cannot be garbage collected. This occurs accidentally when you hold on to references beyond the intended scope.
You'll know that you have leaks w...
Create PostgreSQL ROLE (user) if it doesn't exist
.... The DO statement uses plpgsql as default procedural language. The syntax allows to omit the explicit declaration:
DO [ LANGUAGE lang_name ] code
...
lang_name
The name of the procedural language the code is written in. If
omitted, the default is plpgsql.
...
Send a pull request on GitHub for only latest commit
...
You need to basically create a new branch & cherry-pick the commits you want to add to it.
Note: you might need these before the checkout/cherry-pick commands
git remote add upstream <git repository>
git remote update
git checkout...
How to store a command in a variable in a shell script?
... that variable can be set by someone with less privileges. (Iterating over all subdirectories in /tmp, for instance? You'd better trust every single user on the system to not make one called $'/tmp/evil-$(rm -rf $HOME)\'$(rm -rf $HOME)\'/').
– Charles Duffy
Jun...
LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?
...the same. The names part is a gotcha. This example won't compile even if all columns are varchars join T2 in db.tbl2 on new { T1.firstName, T1.secondName } equals new { T2.colFirst, T2.colSecond }. If you change it to this, it will compile however, join T2 in db.tbl2 on new { N1 = T1.firstName, N...
Why use the INCLUDE clause when creating an index?
...e lowest/leaf level, rather than in the index tree.
This makes the index smaller because it's not part of the tree
INCLUDE columns are not key columns in the index, so they are not ordered.
This means it isn't really useful for predicates, sorting etc as I mentioned above. However, it may be useful...
A top-like utility for monitoring CUDA activity on a GPU
...
Querying the card every 0.1 seconds? Is that going to cause load on the card? Plus, using watch, your starting a new process every 0.1 seconds.
– Mick T
Apr 19 '18 at 15:54
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Converting XML to JSON using Python?
... It's already been mentioned in newer answers. It still only covers a small subset of valid XML constructs, but probably the majority of what people use in practice.
– Dan Lenski
Dec 5 '18 at 11:48
...
Generate random numbers following a normal distribution in C/C++
...iform) random numbers, and by applying an formula to them, you get two normally distributed random numbers. Return one, and save the other for the next request for a random number.
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