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What makes Scala's operator overloading “good”, but C++'s “bad”?
...t to be repeated in newer languages. Certainly, it was one feature specifically dropped when designing Java.
14 Answers
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Dump Mongo Collection into JSON format
...ut.json
WARNING
mongoimport and mongoexport do not reliably preserve all rich BSON data types because JSON can only represent a subset of the types supported by BSON. As a result, data exported or imported with these tools may lose some measure of fidelity.
Also, http://bsonspec.org/
BSO...
set the width of select2 input (through Angular-ui directive)
...ero or more pills.
But if there was one or more pills, and I deleted them all, it would shrink to the smallest width. My solution was simply:
$("#myselect").select2({ width: '100%' });
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Collapsing Sidebar with Bootstrap
...le should help to get you started.
https://codeply.com/p/esYgHWB2zJ
Basically you need to wrap the layout in an outer div, and use media queries to toggle the layout on smaller screens.
/* collapsed sidebar styles */
@media screen and (max-width: 767px) {
.row-offcanvas {
position: relative...
Should a function have only one return statement?
...f-else statements, each with a return? That is nothing. Such a thing is usually easily refactored. (atleast the more common single exit variation with a result variable is, so I doubt the multi exit variation would be any more difficult.) If you want a real headache, look at a combination of if-els...
jQuery see if any or no checkboxes are selected
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JQuery .is will test all specified elements and return true if at least one of them matches selector:
if ($(":checkbox[name='choices']", form).is(":checked"))
{
// one or more checked
}
else
{
// nothing checked
}
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Get list of data-* attributes using javascript / jQuery
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Actually, if you're working with jQuery, as of version 1.4.3 1.4.4 (because of the bug as mentioned in the comments below), data-* attributes are supported through .data():
As of jQuery 1.4.3 HTML 5 data-
attributes will b...
Why does this C++ snippet compile (non-void function does not return a value) [duplicate]
...means that the compiler is not obligated provide an error nor a warning usually because it can be difficult to diagnose in all cases. We can see this from the definition of undefined behavior in the draft standard in section 1.3.24 which says:
[...]Permissible undefined behavior ranges from igno...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
...input list being in the exact order
it's in is 1/(n!). There is such a small likelihood of this that it's
clearly absurd to say that this happened by chance, so it must have
been consciously put in that order by an intelligent Sorter. Therefore
it's safe to assume that it's already optimally...
Does Redis persist data?
I understand that Redis serves all data from memory, but does it persist as well across server reboot so that when the server reboots it reads into memory all the data from disk. Or is it always a blank store which is only to store data while apps are running with no persistence?
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