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Passing arrays as parameters in bash
How can I pass an array as parameter to a bash function?
13 Answers
13
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Find unique rows in numpy.array
I need to find unique rows in a numpy.array .
20 Answers
20
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Is there a NumPy function to return the first index of something in an array?
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Yes, here is the answer given a NumPy array, array, and a value, item, to search for:
itemindex = numpy.where(array==item)
The result is a tuple with first all the row indices, then all the column indices.
For example, if an array is two dimensions and it con...
C char array initialization
I'm not sure what will be in the char array after initialization in the following ways.
6 Answers
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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
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It appears that the first example
x = new Array(3);
Creates an array with undefined pointers.
And the second creates an array with pointers to 3 undefined objects, in this case the pointers them self are NOT undefined, only the objects they point to.
y = [undefin...
How can I implode an array while skipping empty array items?
Perl's join() ignores (skips) empty array values; PHP's implode() does not appear to.
9 Answers
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How do I remove a property from a JavaScript object?
..."bar" }
delete obj.foo
obj.hasOwnProperty("foo") // false
Note that, for arrays, this is not the same as removing an element. To remove an element from an array, use Array#splice or Array#pop. For example:
arr // [0, 1, 2, 3, 4]
arr.splice(3,1); // 3
arr // [0, 1, 2, 4]
Details
delete in JavaS...
What is the most efficient way to concatenate N arrays?
What is the most efficient way to concatenate N arrays of objects in JavaScript?
20 Answers
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What does %w(array) mean?
...bar) is a shortcut for ["foo", "bar"]. Meaning it's a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspider's quickref.
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Create an array with same element repeated multiple times
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You can do it like this:
function fillArray(value, len) {
if (len == 0) return [];
var a = [value];
while (a.length * 2 <= len) a = a.concat(a);
if (a.length < len) a = a.concat(a.slice(0, len - a.length));
return a;
}
It doubles the array in ea...