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Can an abstract class have a constructor?
... edited Dec 30 '16 at 1:19
rimsky
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answered Nov 4 '08 at 3:19
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How to remove all whitespace from a string?
... whitespace, use:
gsub("[[:space:]]", "", x) # note the double square brackets
## [1] "xy" "←→" "xy" NA
gsub("\\s", "", x) # same; note the double backslash
library(regex)
gsub(space(), "", x) # same
"[:space:]" is an R-specific regular expression group matching all space cha...
How to find the Windows version from the PowerShell command line
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Peter Mortensen
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answered Sep 7 '11 at 7:37
Jeff MercadoJeff M...
Git says “Warning: Permanently added to the list of known hosts”
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Solution: create a ~/.ssh/config file and insert the line:
UserKnownHostsFile ~/.ssh/known_hosts
You will then see the message the next time you access Github, but after that you'll not see it anymore because the host is added to the known_hosts file. This fixes the issue, rather than...
setMaxResults for Spring-Data-JPA annotation?
...7.0 (Evans release train).
You can use the newly introduced Top and First keywords that allow you to define query methods like this:
findTop10ByLastnameOrderByFirstnameAsc(String lastname);
Spring Data will automatically limit the results to the number you defined (defaulting to 1 if omitted). N...
How are parameters sent in an HTTP POST request?
...rmat. It's more complicated, but you usually don't need to care what it looks like, so I won't show an example, but it can be good to know that it exists.
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Should I test private methods or only public ones? [closed]
...at should be hidden to the users of the class. Testing private methods breaks encapsulation.
If I find that the private method is huge or complex or important enough to require its own tests, I just put it in another class and make it public there (Method Object). Then I can easily test the previou...
How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?
...ous option to be false to get a synchronous Ajax request. Then your callback can set some data before your mother function proceeds.
Here's what your code would look like if changed as suggested:
beforecreate: function (node, targetNode, type, to) {
jQuery.ajax({
url: 'http://example.c...
How do I disable form fields using CSS?
Is it possible to disable form fields using CSS? I of course know about the attribute disabled, but is it possible to specify this in a CSS rule? Something like -
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How to check that an object is empty in PHP?
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You can cast to an array and then check if it is empty or not
$arr = (array)$obj;
if (!$arr) {
// do stuff
}
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