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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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Using arrays or std::vectors in C++, what's the performance gap?
...en from the internet):
// Comparison of assembly code generated for basic indexing, dereferencing,
// and increment operations on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct...
How to do ToString for a possibly null object?
...Convert.ToString(Object value) since .Net 2.0 (approx. 5 years before this Q was asked), which appears to do exactly what you want:
http://msdn.microsoft.com/en-us/library/astxcyeh(v=vs.80).aspx
Am I missing/misinterpreting something really obvious here?
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How to compare only date components from DateTime in EF?
...writing this answer, the EF-relation was unclear (that was edited into the question after this was written). For correct approach with EF, check Mandeeps answer.
You can use the DateTime.Date property to perform a date-only comparison.
DateTime a = GetFirstDate();
DateTime b = GetSecondDate();
...
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...
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 = $('#a')[0].className.replace(/\bbg.*?\b/g, '');
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MySQL Select Date Equal to Today
...this solution is absolutely correct, it does not scale well (cannot use an index on signup_date, even if such an index exists). Prefer Serjio's solution.
– RandomSeed
Oct 21 '15 at 8:01
...
fatal: early EOF fatal: index-pack failed
I have googled and found many solutions but none work for me.
31 Answers
31
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Use JSTL forEach loop's varStatus as an ID
...is a LoopTagStatus object, not an int. Use:
<div id="divIDNo${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'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);
}
...