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Are foreign keys really necessary in a database design?
... at the data level. They also improve performance because they're normally indexed by default.
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What's the difference between a continuation and a callback?
...e:
var array = [1, 2, 3];
forEach(array, function (element, array, index) {
array[index] = 2 * element;
});
console.log(array);
function forEach(array, callback) {
var length = array.length;
for (var i = 0; i < length; i++)
callback(array[i], array, i);
}
...
Remove Fragment Page from ViewPager in Android
... this.pages = pages;
}
@Override
public Fragment getItem(int index) {
return pages.get(index);
}
@Override
public int getCount() {
return pages.size();
}
@Override
public int getItemPosition(Object object) {
int index = pages.indexOf (o...
MySQL Select Date Equal to Today
...this solution is absolutely correct, it does not scale well (cannot use an index on signup_date, even if such an index exists). Prefer Serjio's solution.
– RandomSeed
Oct 21 '15 at 8:01
...
Use JSTL forEach loop's varStatus as an ID
...is a LoopTagStatus object, not an int. Use:
<div id="divIDNo${theCount.index}">
To clarify:
${theCount.index} starts counting at 0 unless you've set the begin attribute
${theCount.count} starts counting at 1
shar...
What are good examples of genetic algorithms/genetic programming solutions? [closed]
...e.g., alphabetized. Call this the reference solution. Think of a guest's index as his/her seat number.
Instead of trying to encode this ordering directly in the chromosome, we encode instructions for transforming the reference solution into a new solution. Specifically, we treat the chromosomes ...
Remove all classes that begin with a certain string
...
With jQuery, the actual DOM element is at index zero, this should work
$('#a')[0].className = $('#a')[0].className.replace(/\bbg.*?\b/g, '');
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fatal: early EOF fatal: index-pack failed
I have googled and found many solutions but none work for me.
31 Answers
31
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Any implementation of Ordered Set in Java?
... There is no function in LinkedHashSet that allows you to figure out which index the element is in as well.
– searchengine27
May 5 '17 at 1:06
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How do I get the first element from an IEnumerable in .net?
...nsion method:
static T ElementAt<T>(IEnumerable<T> items, int index)
{
using(IEnumerator<T> iter = items.GetEnumerator())
{
for (int i = 0; i <= index; i++, iter.MoveNext()) ;
return iter.Current;
}
}
Calling it like so:
int[] items = { 1, 2, 3, ...