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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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Section vs Article HTML5
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subjects, or to define the different sections of a single article.
And then displays an image that I cleaned up:
It also describes how to use the <article> tag (from same W3 link above):
<article> is related to <section>, but is distinctly different.
Whereas <se...
Bootstrap Carousel image doesn't align properly
...better results for than the default height:500px
– CrandellWS
Jul 27 '15 at 23:08
You should do .carousel-inner > ....
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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Is it possible to disable scrolling on a ViewPager
...antiates a View . I'd like to disable both the scrolling of the viewpager and the child buttons momentarily while a search result is returned to the view. I've calling viewPager.setEnabled(false) but this doesn't disable it.
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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 to find where gem files are installed
... repository
list Display gems whose name starts with STRING
lock Generate a lockdown list of gems
mirror Mirror all gem files (requires rubygems-mirror)
outdated Display all gems that need updates
owner ...
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...
What is the difference between HTTP status code 200 (cache) vs status code 304?
... changed, changing the actual filename of the asset or appending a version string to requests for that asset. This eliminates the need for any request to be made unless the asset has definitely changed from the version in cache (no need for that 304 response). Google has more details on correct use ...
Twig ternary operator, Shorthand if-then-else
Does Twig support ternary (shorthand if-else) operator?
3 Answers
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