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Why is my program slow when looping over exactly 8192 elements?
...hy does the order of the loops affect performance when iterating over a 2D array?
You are iterating the matrix column-wise instead of row-wise.
To solve this problem, you should interchange the two loops.
for(j=1;j<SIZE-1;j++) {
for(i=1;i<SIZE-1;i++) {
res[j][i]=0;
res...
Javascript reduce() on Object
There is nice Array method reduce() to get one value from the Array. Example:
13 Answers
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JavaScript data grid for millions of rows [closed]
...ut I made a few changes to make grid independent of the length of the data array. It's a kludge, but I have the responses populating a bigdata array, and the smaller data pulls from the bigdata array. The rest of the program uses the smaller data array, except for the scroll-bar measurement and a fe...
Serialize object to query string in JavaScript/jQuery [duplicate]
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Note that if you have an array in your object it doesn't get parameterized correctly.
– crv
Apr 26 '12 at 19:46
2
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How to set default value for form field in Symfony2?
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Can be use during the creation easily with :
->add('myfield', 'text', array(
'label' => 'Field',
'empty_data' => 'Default value'
))
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Removing duplicate objects with Underscore for Javascript
I have this kind of array:
13 Answers
13
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Populate nested array in mongoose
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populate paths in array also worked for me: populate: ['components','AnotherRef']
– Yasin Okumuş
Apr 7 '19 at 0:23
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...y generics are invariant in Java. Brief example of unsoundness using Java arrays (which are erroneously covariant):
Object[] arr = new Integer[1];
arr[0] = "Hello, there!";
We just assigned a value of type String to an array of type Integer[]. For reasons which should be obvious, this is bad ne...
How can I check if a value is a json object?
...n); // true
The best way to validate that an object is of type JSON or array is as follows:
var a = [],
o = {};
Solution 1
toString.call(o) === '[object Object]'; // true
toString.call(a) === '[object Array]'; // true
Solution 2
a.constructor.name === 'Array'; // true
o.constructor.na...
Efficient way to rotate a list in python
...> a=numpy.arange(1,10) #Generate some data
>>> numpy.roll(a,1)
array([9, 1, 2, 3, 4, 5, 6, 7, 8])
>>> numpy.roll(a,-1)
array([2, 3, 4, 5, 6, 7, 8, 9, 1])
>>> numpy.roll(a,5)
array([5, 6, 7, 8, 9, 1, 2, 3, 4])
>>> numpy.roll(a,9)
array([1, 2, 3, 4, 5, 6, 7, 8, 9...