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Difference between __str__ and __repr__?
...the __repr__, NOT the __str__, for the items it contains. And, despite the words on the subject found in typical docs, hardly anybody bothers making the __repr__ of objects be a string that eval may use to build an equal object (it's just too hard, AND not knowing how the relevant module was actuall...
How to avoid “if” chains?
...n what is called "opportunistic return" or "opportunistic exit." In other words, it breaks the pattern that each and every function should have exactly one point of exit. This is a problem for two reasons:
It rubs some people the wrong way, e.g. people who learned to code on Pascal have learned ...
Permutations in JavaScript?
...y (including undefined), in which case it will be an empty array. In other words, it's a less than ideal way to provide the function parameter with a default value.
– Mr. Lavalamp
May 19 '16 at 21:52
...
How to filter SQL results in a has-many-through relation
... AND y.club_id = 10
)
Dynamic number of club memberships
In other words: varying number of filters. This question asked for exactly two club memberships. But many use cases have to prepare for a varying number.
Detailed discussion in this related later answer:
Using same column multiple ...
Can I mask an input text in a bat file?
...le to execute some other programs. In this case I need to prompt for a password. Do I have any way to mask the input text? I don't need to print ******* characters instead of input characters. Linux's Password prompt behavior (Print nothing while typing) is enough.
...
Protecting executable from reverse engineering?
...
The best anti disassembler tricks, in particular on variable word length instruction sets are in assembler/machine code, not C. For example
CLC
BCC over
.byte 0x09
over:
The disassembler has to resolve the problem that a branch destination is the second byte in a multi byte instr...
Which characters need to be escaped in HTML?
...d of normal spaces to prevent a line break from being inserted between two words, or to insert extra space without it being automatically collapsed, but this is usually a rare case. Don't do this unless you have a design constraint th...
What does this square bracket and parenthesis bracket notation mean [first1,last1)?
...om 1 .. 10 (inclusive) would be notated as such:
[1,10]
Notice how the word inclusive was used. If we want to exclude the end point but "cover" the same range we need to move the end-point:
[1,11)
For both left and right edges of the interval there are actually 4 permutations:
(1,10) = 2,...
Generic type parameter naming convention for Java (with multiple chars)?
...rwin Mueller. His suggestion makes perfect obvious sense to me: Append the word Type.
Call an apple an apple, a car a car. The name in question is the name of a data type, right? (In OOP, a class essentially defines a new data type.) So call it a “Type”.
Mueller’s example, drawn from the or...
Why does the JVM still not support tail-call optimization?
...
This is merely a matter of wording the spec of a single method, from "gives you all stack frames" to "gives you all active stackframes, leaving out the ones obsoleted by tail calls". Furthermore, one could make it a command line switch or a system prop...