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Why is SELECT * considered harmful?
....ID = a.B_ID);
in any database worth its salt, * just means "a row". It doesn't matter what you put in the subquery. Some people use b's ID in the SELECT list, or they'll use the number 1, but IMO those conventions are pretty much nonsensical. What you mean is "count the row", and that's what *...
Curly braces in string in PHP
...ng braces
echo "qwe" . $a . "rty"; // qwe12345rty, concatenation used
// Does not work:
echo 'qwe{$a}rty'; // qwe{$a}rty, single quotes are not parsed
echo "qwe$arty"; // qwe, because $a became $arty, which is undefined
?>
...
How do I parse JSON with Objective-C?
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Does using this really provide any advantage over NSJSONSerialization ?
– Kiran
Jun 10 '14 at 13:53
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Using Phonegap for Native Application development [closed]
...ap has loaded and is ready. $(document).ready or whatever you're used to, doesn't really apply here - unless you're only doing interface/hard-coded HTML stuff. If you're interacting with iPhone features, like GeoLocation, you will need to do everything after onDeviceReady has been called.
Pick a ...
Why it's not possible to use regex to parse HTML/XML: a formal explanation in layman's terms
... automaton (which is the data structure underlying a regular
expression) does not have memory apart from the state it's in, and if
you have arbitrarily deep nesting, you need an arbitrarily large
automaton, which collides with the notion of a finite automaton.
The definition of regular expre...
What's the difference between disabled=“disabled” and readonly=“readonly” for HTML form input fields
... So it is my understanding that disabled implies readonly but readonly does not imply disabled. In other words if an element has the disabled attribute then there is no need to also include the readonly attribute. Correct?
– chharvey
Dec 6 '15 at 18:43
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Using GPU from a docker container?
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Is there windows support? It doesn't seem to be, but perhaps I'm missing something.
– Blaze
Nov 14 '15 at 22:36
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How to delete images from a private docker registry?
... the following graph, the image D is not based on C but on B. Therefore, D doesn't depend on C. If you delete tag <version1> in this graph, the image C will not be used by any image and this script can remove it.
A <- B <--------- D
\ |
\ <version2&...
What makes Lisp macros so special?
...sion of disbelief and pretend Lisp has a very limited loop macro that just does iteration and no easy way to do the equivalent of list comprehensions.
In Lisp you could write the following. I should note this contrived example is picked to be identical to the Python code not a good example of L...
The Definitive C Book Guide and List
...Steve Summit (1995). This is the book of the web site listed earlier. It doesn't cover C99 or the later standards.
C in a Nutshell - Peter Prinz and Tony Crawford (2005). Excellent book if you need a reference for C99.
Functional C - Pieter Hartel and Henk Muller (1997). Teaches modern practices...