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Rails “validates_uniqueness_of” Case Sensitivity
... no column has the same value as that in the record being validated at the time the validation is performed. It’s possible for two records to be created at the same time, each with the same value for a column that should be unique, and for both records to pass validation. The most reliable way to ...
How can I enable or disable the GPS programmatically on Android?
...ing on/off GPS programatically on android has been discussed many times , and the answer is always the same:
16 A...
How to sum a variable by group
...", "Third", and the second column has numbers that represent the number of times I saw the specific groups from "Category".
...
What is HEAD in Git?
...led master. A repository
can contain any number of heads. At
any given time, one head is selected
as the “current head.” This head is
aliased to HEAD, always in capitals".
Note this difference: a “head”
(lowercase) refers to any one of the
named heads in the repository; “H...
Using msbuild to execute a File System Publish Profile
...
@АнтонКурьян: Links tend to die after some time, that's why questions and answers on stackoverflow.com should always be self-contained without relying on external resources.
– Oliver
Sep 29 '14 at 20:51
...
XSD - how to allow elements in any order any number of times?
... in your question, child1 or child2 can appear in any order, any number of times. So this sounds like what you are looking for.
Edit: if you wanted only one of them to appear an unlimited number of times, the unbounded would have to go on the elements instead:
Edit: Fixed type in XML.
Edit: Capit...
What is the advantage of using REST instead of non-REST HTTP?
...t you want to get. This is especially important on mobile where round-trip-time can be significant and connections are unreliable. For example, suppose you are getting posts on a facebook timeline. The "pure" REST way would be something like
GET /timeline_posts // Returns a list of post IDs.
G...
Possible to make labels appear when hovering over a point in matplotlib?
...t when hovering and moving on a point it calls fig.canvas.draw_idle() many times (it even changes the cursor to idle). I solved it storing the previous index and checking if ind["ind"][0] == prev_ind. Then only update if you move from one point to another (update text), stop hovering (make the annot...
.htm vs .html ? Which file extension naming is more correct? [closed]
... file it is. The web server does not need to pass an extension. But it sometimes does. See - URL Rewrite.
– TamusJRoyce
Dec 29 '16 at 21:40
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What is the difference between HTTP status code 200 (cache) vs status code 304?
.... future-dated Expires or Cache-Control: max-age headers), and that at the time you triggered the new request, those cached objects were still stored in local cache and had not yet expired.
304s, on the other hand, are the response of the server after the browser has checked if a file was modified ...