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Why does string::compare return an int?
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First, the specification is that it will return a value less
than, equal to or greater than 0, not necessarily -1 or 1.
Secondly, return values are rvalues, subject to integral
promotion, so there's no point in returning anything smaller.
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What is better, adjacency lists or adjacency matrices for graph problems in C++?
...^2) memory
It is fast to lookup and check for presence or absence of a specific edge
between any two nodes O(1)
It is slow to iterate over all edges
It is slow to add/delete a node; a complex operation O(n^2)
It is fast to add a new edge O(1)
Adjacency List
Memory usage depends on the number...
How do I group Windows Form radio buttons?
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@UweB what if I cant add group boxes and panels due to any problem let say I don't have much space on my form. Then?
– Muhammad Saqib
Jan 3 '15 at 10:29
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What is the best way to conditionally apply attributes in AngularJS?
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Just to clarify this answer: If you prefix any attribute with ng-attr-, then the compiler will strip the prefix, and add the attribute with its value bound to the result of the angular expression from the original attribute value.
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JavaScript: client-side vs. server-side validation
...rst because you can give better feedback to the average user. For example, if they enter an invalid email address and move to the next field, you can show an error message immediately. That way the user can correct every field before they submit the form.
If you only validate on the server, they ha...
How to remove items from a list while iterating?
...terating over a list of tuples in Python, and am attempting to remove them if they meet certain criteria.
26 Answers
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“To Do” list before publishing Android app to market [closed]
... ready to publish my first app to the Android market, and I'd like to know if any of you have any tips about any experiences you may have encountered in regard to publishing an app that goes beyond the obvious and already documented.
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How can I determine if a String is non-null and not only whitespace in Groovy?
..., which is great, but there doesn't seem to be a good way of determining if a String has something other than just white space in it.
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How do I hide an element on a click event anywhere outside of the element?
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If I understand, you want to hide a div when you click anywhere but the div, and if you do click while over the div, then it should NOT close. You can do that with this code:
$(document).click(function() {
alert("me");
}...
SQL JOIN vs IN performance?
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Generally speaking, IN and JOIN are different queries that can yield different results.
SELECT a.*
FROM a
JOIN b
ON a.col = b.col
is not the same as
SELECT a.*
FROM a
WHERE col IN
(
SELECT col
FROM b
)
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