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MySQL Conditional Insert
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In this, dual is a table with one row only (found originally in Oracle, now in mysql too). The logic is that the SELECT statement generates a single row of data with the required values, but only when the values are not already found.
Alternatively, look at the MERGE statement.
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How to make an AJAX call without jQuery?
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I know this is a fairly old question, but there is now a nicer API available natively in newer browsers. The fetch() method allow you to make web requests.
For example, to request some json from /get-data:
var opts = {
method...
How to change SmartGit's licensing option after 30 days of commercial use on ubuntu?
...ust clicking "next" button : ) (30 day trial and then you have to buy it). Now today is my 31st day of using SG and I can't change my licensing options (reinstalling smartgit doesn't help) and I'm not able to use SG anymore without paying (I'm not using it for commercial purposes). Do you know how t...
Equivalent of LIMIT and OFFSET for SQL Server?
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Old now. Sql Server 2012 and later support OFFSET/FETCH
– Joel Coehoorn
Sep 17 '13 at 3:06
31
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How to get notified about changes of the history via history.pushState?
So now that HTML5 introduces history.pushState to change the browsers history, websites start using this in combination with Ajax instead of changing the fragment identifier of the URL.
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Preloading images with JavaScript
... globally which can cause error that are really hard to solve (unless you know that you forgot the var statement. for (var i = 0.....
– Mohammer
Jun 13 '16 at 23:37
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Unix - copy contents of one directory to another [closed]
And now Folder2/ looks like:
3 Answers
3
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How to get scrollbar position with Javascript?
...ody in most modern browsers - it's usually set on document.documentElement now. See bugs.chromium.org/p/chromium/issues/detail?id=157855 for Chrome's transition.
– fzzfzzfzz
May 3 '18 at 15:51
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Twitter Bootstrap CSS affecting Google Maps
...e Maps integration and other projects, but we're taking a different stance now on these things and will require developers to make these tweaks on their end."
– kevinwmerritt
Apr 30 '12 at 16:58
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VS 2010 Test Runner error “The agent process was stopped while the test was running.”
...m: some tests fail and they are different in different test runs. I don't know exactly the reason why it happens, but it began to occur when I added a finalizer to one of my classes. When I disable the finalizer - the problem disappears. When I turn the finalizer on - the problem comes back.
Right ...