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How to pass the password to su/sudo/ssh without overriding the TTY?
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For sudo there is a -S option for accepting the password from standard input. Here is the man entry:
-S The -S (stdin) option causes sudo to read the password from
the standard input instead of t...
prevent refresh of page when button inside form clicked
I have an issue while using buttons inside form. I want that button to call function. It does, but with unwanted result that it refresh the page.
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What is cardinality in MySQL?
...rty which affects the ability to cluster, sort and search data. It is therefore an important measurement for the query planners in DBs, it is a heuristic which they can use to choose the best plans.
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Using DISTINCT and COUNT together in a MySQL Query
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Im against answers that don't offer optimal performance when it comes to databases. It's critical to keep perfomance standards. I'd go with @alistair-hart 's answer.
– JDuarteDJ
Jan 20 '15 at 15:45
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Purge Kafka Topic
...-entity-name <topic name> --add-config retention.ms=1000
then wait for the purge to take effect (about one minute). Once purged, restore the previous retention.ms value.
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jQuery textbox change event doesn't fire until textbox loses focus?
...u wanted to be pedantic about it, you should also bind to mouseup to cater for dragging text around, and add a lastValue variable to ensure that the text actually did change:
var lastValue = '';
$("#textbox").on('change keyup paste mouseup', function() {
if ($(this).val() != lastValue) {
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IOS: create a UIImage or UIImageView with rounded corners
...dius;
yourImageView.clipsToBounds = YES;
See the CALayer class reference for more info.
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Determine if an element has a CSS class with jQuery
...ched literally against the collection's elements' className string. So if, for instance, you have an element,
<span class="foo bar" />
then this will return true:
$('span').hasClass('foo bar')
and these will return false:
$('span').hasClass('bar foo')
$('span').hasClass('foo bar')
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Entity Framework select distinct name
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That way get better performance than grouping. Distinct : SQL Server Execution Times: CPU time = 0 ms, elapsed time = 50 ms. Grouping : SQL Server Execution Times: CPU time = 0 ms, elapsed time = 112 ms.
– Andre Mendo...
How to change position of Toast in Android?
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Gravity constant, an x-position offset, and a y-position offset.
For example, if you decide that the toast should appear in the
top-left corner, you can set the gravity like this:
toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);
If you want to nudge the position to the right, inc...