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quick random row selection in Postgres
... that contains couple of millions of rows. I have checked on the internet and I found the following
7 Answers
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How can I change the color of pagination dots of UIPageControl?
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UPDATE:
This answer is 6 years old and very outdated, but it's still attracting votes and comments. Ever since iOS 6.0 you should be using the pageIndicatorTintColor and currentPageIndicatorTintColor properties on UIPageControl.
ORIGINAL ANSWER:
I ran into t...
How can I resize an image dynamically with CSS as the browser width/height changes?
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This can be done with pure CSS and does not even require media queries.
To make the images flexible, simply add max-width:100% and height:auto. Image max-width:100% and height:auto works in IE7, but not in IE8 (yes, another weird IE bug). To fix this, you...
get size of json object
i have a json object that gets returned by an AJAX request and I am having some trouble with the .length because it keeps returning undefined . Just wondering if I'm using it right:
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jQuery remove all list items from an unordered list
I forgot the jQuery command that will clear all list elements from a list. I did a bit of searching, done it a bunch of times before, but just simply forgot the command.
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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
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@blub: If you create a unique key on geb and topic it will work (ALTER TABLE table ADD UNIQUE geb_by_topic (geb, topic)).
– chaos
Aug 2 '09 at 13:43
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How do I increase the RAM and set up host-only networking in Vagrant?
I would like to increase the RAM to at least 1 GB and I would like to configure “Host-Only” networking to use "199.188.44.20".
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Call AngularJS from legacy code
...using jQuery's .data function. This will speed your app up. Additionally, handing off your scopes to jquery's caching features will create memory leaks. So, you should definitely turn this off, to speed up your app. Angular's site has a production guide that you should use to learn more.
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PHP: How to use array_filter() to filter array keys?
...ainst the key, e.g. $allowed could contain regex patterns instead of plain strings.
You can also use ARRAY_FILTER_USE_BOTH to have both the value and the key passed to your filter function. Here's a contrived example based upon the first, but note that I'd not recommend encoding filtering rules usi...
What is the correct SQL type to store a .Net Timespan with values > 24:00:00?
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An option is store it as a string, you can then load it using TimeSpan.Parse(text). not ideal from a size perspective or SQL querys but can be parsed in TSQL if needed
– Walter Vehoeven
Aug 24 '18 at 15:08
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