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Understanding typedefs for function pointers in C
...signal number because the same function is used for both.
Then I create an array of structures, where each element identifies a signal number and the handler to be installed for that signal. I've chosen to worry about 3 signals; I'd often worry about SIGHUP, SIGPIPE and SIGTERM too and about whethe...
How are strings passed in .NET?
...t. You can't do strLocal[3] = 'H' in C# like you could with a C-style char array; you have to construct a whole new string instead. The only way to change strLocal is to point the reference at another string, and that means nothing you do to strLocal can affect strMain. The value is immutable, and t...
“Single-page” JS websites and SEO
...u may have to use an uncompiled template on the client, looping through an array of users to build a list. The view re-renders every time a user's model changes. How would you do that without duplicating the templates (and not asking the server to render the view for the client)?
...
How to deal with SettingWithCopyWarning in Pandas?
...ence is that iloc expects either
integers/positions for index or a numpy array of boolean values, and
integer/position indexes for the columns.
For example,
df.loc[df.A > 5, 'B'] = 4
Can be written nas
df.iloc[(df.A > 5).values, 1] = 4
And,
df.loc[1, 'A'] = 100
...
Javascript object Vs JSON
...A JavaScript object on the other hand is a physical type. Just like a PHP array, a C++ class/ struct, a JavaScript object is an type internal to JavaScript.
Here's a story. Let's imagine you've purchased some furniture from a store, and you want it delivered. However the only one left in stock is ...
Draw in Canvas by finger, Android
...GB();
cm.postConcat(tmp);
final float[] a = cm.getArray();
int ir = floatToByte(a[0] * r + a[1] * g + a[2] * b);
int ig = floatToByte(a[5] * r + a[6] * g + a[7] * b);
int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);
...
Please explain the exec() function and its family
...e passed as a list of strings to the main()
v : arguments are passed as an array of strings to the main()
p : path/s to search for the new running program
e : the environment can be specified by the caller
You can mix them, therefore you have:
int execl(const char *path, const char *arg, ...);
i...
Java 8: Lambda-Streams, Filter by Method with Exception
..."a");
}
}
List<Account> accounts = new ArrayList<>(Arrays.asList(new Account("andrey"), new Account("angela"), new Account("pamela")));
Stream<Account> s = accounts.stream();
s
.filter(a -> propagate(a::isActive))
...
Why were pandas merges in python faster than data.table merges in R in 2012?
... to these kinds of operations than R's data.frame (which is just a list of arrays internally).
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What are the benefits of dependency injection containers?
...terators, nearly anything with annotations, anything that initializes with arrays. Most great programming structures are an attempt to separate out the differences in your code and combine what's left, driving it with something that can be grouped and managed better.
– Bill K
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