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How to find gaps in sequential numbering in mysql?

...r Here's version that works on table of any size (not just on 100 rows): SELECT (t1.id + 1) as gap_starts_at, (SELECT MIN(t3.id) -1 FROM arrc_vouchers t3 WHERE t3.id > t1.id) as gap_ends_at FROM arrc_vouchers t1 WHERE NOT EXISTS (SELECT t2.id FROM arrc_vouchers t2 WHERE t2.id = t1.id + ...
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Prevent text selection after double click

...lick event on a span in my web app. A side-effect is that the double click selects text on the page. How can I prevent this selection from happening? ...
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How do I make a placeholder for a 'select' box?

...s which is working out just fine. But I'd like to use a placeholder for my selectboxes as well. Of course I can just use this code: ...
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jQuery Get Selected Option From Dropdown

Usually I use $("#id").val() to return the value of the selected option, but this time it doesn't work. The selected tag has the id aioConceptName ...
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Is it possible to use JS to open an HTML select to show its option list? [duplicate]

Is it possible to use JavaScript to open an HTML select to show its option list? 11 Answers ...
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Set cursor position on contentEditable

...upport DOM Range. var editable = document.getElementById('editable'), selection, range; // Populates selection and range variables var captureSelection = function(e) { // Don't capture selection outside editable region var isOrContainsAnchor = false, isOrContainsFocus = false, ...
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Removing an item from a select box

How do I remove items from, or add items to, a select box? I'm running jQuery, should that make the task easier. Below is an example select box. ...
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Select2 doesn't work when embedded in a bootstrap modal

When I use a select2 (input) in bootstrap modal, I can't type anything into it. It's like disabled? Outside the modal select2 works fine. ...
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Set select option 'selected', by value

I have a select field with some options in it. Now I need to select one of those options with jQuery. But how can I do that when I only know the value of the option that must be selected? ...
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Why does AngularJS include an empty option in select?

...efined in the specification at http://docs.angularjs.org/api/ng.directive:select , I still get an empty option as the first child of select element. ...