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How do I pass an extra parameter to the callback function in Javascript .filter() method?
...turn function(element) {
return element.indexOf(wordToCompare) === 0;
}
}
addressBook.filter(startsWith(wordToCompare));
Another option would be to use Function.prototype.bind [MDN] (only available in browser supporting ECMAScript 5, follow a link for a shim for older browsers) and "f...
Efficient evaluation of a function at every cell of a NumPy array
... it:
import numpy as np
def f(x):
return x * x + 3 * x - 2 if x > 0 else x * 5 + 8
f = np.vectorize(f) # or use a different name if you want to keep the original f
result_array = f(A) # if A is your Numpy array
It's probably better to specify an explicit output type directly when vect...
What's the role of GetHashCode in the IEqualityComparer in .NET?
...
202
A bit of background first...
Every object in .NET has an Equals method and a GetHashCode metho...
Convert Existing Eclipse Project to Maven Project
...
140
If you just want to create a default POM and enable m2eclipse features: so I'm assuming you do n...
Changing the color of an hr element
...ecifies the following rule:
hr { display: block; height: 1px;
border: 0; border-top: 1px solid #ccc;
margin: 1em 0; padding: 0; }
An article titled “12 Little-Known CSS Facts”, published recently by SitePoint, mentions that <hr> can set its border-color to its parent's color if ...
Inspecting standard container (std::map) contents with gdb
...db that can inspect STL containers for you:
http://sourceware.org/ml/gdb/2008-02/msg00064.html
However, I don't use this, so YMMV
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Java HTTPS client certificate authentication
... -name "Whatever"
Tip: make sure you get the latest OpenSSL, not version 0.9.8h because that seems to suffer from a bug which doesn't allow you to properly generate PKCS#12 files.
This PKCS#12 file will be used by the Java client to present the client certificate to the server when the server has...
C libcurl get output into a string
...*ptr;
size_t len;
};
void init_string(struct string *s) {
s->len = 0;
s->ptr = malloc(s->len+1);
if (s->ptr == NULL) {
fprintf(stderr, "malloc() failed\n");
exit(EXIT_FAILURE);
}
s->ptr[0] = '\0';
}
size_t writefunc(void *ptr, size_t size, size_t nmemb, struct st...
How is Python's List Implemented?
...
60
It's a dynamic array. Practical proof: Indexing takes (of course with extremely small difference...
Check if an array contains any element of another array in JavaScript
...
Vanilla JS
ES2016:
const found = arr1.some(r=> arr2.includes(r))
ES6:
const found = arr1.some(r=> arr2.indexOf(r) >= 0)
How it works
some(..) checks each element of the array against a test function and returns true if any ...
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