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Why exactly is eval evil?
I know that Lisp and Scheme programmers usually say that eval should be avoided unless strictly necessary. I’ve seen the same recommendation for several programming languages, but I’ve not yet seen a list of clear arguments against the use of eval . Where can I find an account of the potentia...
How to define a two-dimensional array?
...sion that could arise with the indexing, if you use "x" for both the inner and outer lists, and want a non-square Matrix.
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NGINX to reverse proxy websockets AND enable SSL (wss://)?
I'm so lost and new to building NGINX on my own but I want to be able to enable secure websockets without having an additional layer.
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How do HashTables deal with collisions?
...ll full then the hash table can increase the number of buckets that it has and then redistribute all the elements in the table. The hash function returns an integer and the hash table has to take the result of the hash function and mod it against the size of the table that way it can be sure it will...
When should one use final for method parameters and local variables?
... references ( for example ) that suggest using final as much as possible and I'm wondering how important that is. This is mainly in the the context of method parameters and local variables, not final methods or classes. For constants, it makes obvious sense.
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In Python, what is the difference between “.append()” and “+= []”?
...d will add one item to the list, while += will copy all elements of right-hand-side list into the left-hand-side list.
Update: perf analysis
Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCTION, and += version -- in BUILD_LIST. Apparently BUILD_LIST outw...
Scala 2.8 breakOut
...at]) : That
Note that it has two parameters. The first is your function and the second is an implicit. If you do not provide that implicit, Scala will choose the most specific one available.
About breakOut
So, what's the purpose of breakOut? Consider the example given for the question, You tak...
How to find the nearest parent of a Git branch?
... have envisioned.
Git’s history is based on a DAG of commits. Branches (and “refs” in general) are just transient labels that point to specific commits in the continually growing commit DAG. As such, the relationship between branches can vary over time, but the relationship between commits do...
What does $.when.apply($, someArray) do?
I'm reading about Deferreds and Promises and keep coming across $.when.apply($, someArray) . I'm a little unclear on what this does exactly, looking for an explanation that one line works exactly (not the entire code snippet). Here's some context:
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Why do we use arrays instead of other data structures?
...gured the added "features" in programming languages had improved upon this and by that replaced them. I see now that they aren't replaced but rather given new life, so to speak.
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