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LINQ equivalent of foreach for IEnumerable
... Is.EquivalentTo(values.ToList()));
}
The following fails with the error:
Expected: equivalent to < 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 >
But was: < 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 >
[Test]
public void ForEachKeywordFail()
{
//Yes, I know there is an Observable.Range.
var va...
Finding three elements in an array whose sum is closest to a given number
... a better solution because it's easier to read and therefore less prone to errors. The only problem is, we need to add a few lines of code to avoid multiple selection of one element.
Another O(n^2) solution (by using a hashset).
// K is the sum that we are looking for
for i 1..n
int s1 = K - A...
How do I automatically sort a has_many relationship in Rails?
...in the model?
– Wit
Jun 21 '17 at 8:05
@Wit - you can add .order() to the method chain, like in the last example. Is t...
Insert Update trigger how to determine if insert or update
...ISTS(SELECT 1/0 ...) and it will still work and won't cause divide by zero error.
– Endrju
Oct 5 '14 at 10:15
1
...
Test if characters are in a string
...try to match on an invalid regex, it doesn't work:
> grep("[", "abc[")
Error in grep("[", "abc[") :
invalid regular expression '[', reason 'Missing ']''
To do a true substring test, use fixed = TRUE.
> grep("[", "abc[", fixed = TRUE)
[1] 1
If you do want regex, great, but that's not w...
SVG gradient using CSS
I'm trying to get a gradient applied to an SVG rect element.
6 Answers
6
...
Get started with Latex on Linux [closed]
Impressed by is-latex-worth-learning-today , and many how-to's on Windows,
8 Answers
...
string sanitizer for filename
...er in an unsafe HTML context because this absolutely legal filename:
' onerror= 'alert(document.cookie).jpg
becomes an XSS hole:
<img src='<? echo $image ?>' />
// output:
<img src=' ' onerror= 'alert(document.cookie)' />
Because of that, the popular CMS software Wordpress r...
Detect URLs in text with JavaScript
Does anyone have suggestions for detecting URLs in a set of strings?
13 Answers
13
...
Check whether an array is empty [duplicate]
...'t mean that array is empty. As a quick workaround you can do following:
$errors = array_filter($errors);
if (!empty($errors)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() cons...