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A semantics for Bash scripts?
...ion to Bash as a programming language. For example: What is the evaluation order? what are the scoping rules? What is the typing discipline, e.g. is everything a string? What is the state of the program -- is it a key-value assignment of strings to variable names; is there more than that, e.g. the s...
Sort a list by multiple attributes?
...ring']:
'''helper to sort by the attributes named by strings of attrs in order'''
return lambda k: [ getattr(k, attr) for attr in attrs ]
then to use it
# would defined elsewhere but showing here for consiseness
self.SortListA = ['attrA', 'attrB']
self.SortListB = ['attrC', 'attrA']
records =...
What's the difference between the data structure Tree and Graph?
...essor node and one or two successor nodes. It can be traversed by using In-order, Pre-order, Post-order, and Breadth First traversals. Tree is a special kind of graph that has no cycle so that is known as DAG (Directed Acyclic Graph). Tree is a hierarchical model.
In graph, each node has one or ...
What is Gradle in Android Studio?
...s \src folder) or resources files (in Eclipse it is \res folder).
Now, in order to automate all these tasks, there has to be a script; you can write your own build system using shell scripting in linux or batch files syntax in windows. Got it?
Gradle is another build system that takes the best fea...
Advantage of creating a generic repository vs. specific repository for each object?
... for users.Where(u=>u.HasPurchasedAnything) instead of users.Join(x=>Orders, something something, I dont know linq).Where(order=>order.Status==1).Join(x=>x.products).Where(x.... etc etc etc.... blah blah blah
– Arnis Lapsa
Oct 7 '11 at 17:43
...
Find out what process registered a global hotkey? (Windows API)
...is compilable in Delphi 2007 with a couple of tweaks.
It's a DLL with a call to SetWindowsHookEx that passes through a callback function, which can then intercept key strokes: In this case, it's tinkering with them for fun, changing left cursor to right, etc. A simple app then calls the DLL and re...
What is a “surrogate pair” in Java?
..."chars" long, totaling 6 "chars". All 6 "chars" must be kept together, in order (i.e. not reversed), when reversing the entire string of characters.
– Triynko
Aug 9 '13 at 6:52
4
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Core pool size vs maximum pool size in ThreadPoolExecutor
...lementation and answers the questions that SHOULD be asked and answered in order to really understand this corePoolSize/maxPoolSize behavior of the thread pool.
– Pavel
Sep 13 at 5:39
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How can one see the structure of a table in SQLite? [duplicate]
...m_todo_index ON alarms(todo);
Note also that SQLite saves the schema and all information about tables in the database itself, in a magic table named sqlite_master, and it's also possible to execute normal SQL queries against that table. For example, the documentation link above shows how to derive...
Add new value to an existing array in JavaScript [duplicate]
In PHP, I'd do something like:
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