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Java NIO FileChannel versus FileOutputstream performance / usefulness
... same level, also many times the FileChannel way is slower. Can I please know more details comparing these two methods. Here is the code I used, the file that I am testing with is around 350MB . Is it a good option to use NIO based classes for File I/O, if I am not looking at random access or oth...
Meaning of tilde in Linux bash (not home directory)
First off, I know that ~/ is the home directory. CDing to ~ or ~/ takes me to the home directory.
8 Answers
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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
... if (condition(data[c]))
sum += data[c];
wouldn't. It's kosher here, since the condition ensures all data[c] that are added have the same sign, so if one overflows, both do.
I wouldn't be too sure that the compiler took that into account, though (@Mysticial, could you try with a ...
Extract only right most n letters from a string
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Vilx-Vilx-
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Get array of object's keys
I would like to get the keys of a JavaScript object as an array, either in jQuery or pure JavaScript.
7 Answers
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TypeError: method() takes 1 positional argument but 2 were given
... the point of view of the caller.
This is because most methods do some work with the object they're called on, so there needs to be some way for that object to be referred to inside the method. By convention, this first argument is called self inside the method definition:
class MyNewClass:
d...
Using the “start” command with parameters passed to the started program
...In other words, give it an empty title before the name of the program to fake it out.
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node.js database [closed]
I'm looking for a database to pair with a node.js app. I'm assuming a json/nosql db would be preferable to a relational DB [I can do without any json/sql impedance mismatch]. I'm considering:
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Ruby on Rails generates model field:type - what are the options for field:type?
...new model and forget the syntax for referencing another model's ID. I'd look it up myself, but I haven't figured out, among all my Ruby on Rails documentation links, how to find the definitive source.
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Ruby convert Object to Hash
Let's say I have a Gift object with @name = "book" & @price = 15.95 . What's the best way to convert that to the Hash {name: "book", price: 15.95} in Ruby, not Rails (although feel free to give the Rails answer too)?
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