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How to get first character of a string in SQL?
... be
SUBSTRING (my_column FROM 1 FOR 1)
The point is, transforming from one to the other, hence to any similar vendor variation, is trivial.
p.s. It was only recently pointed out to me that functions in standard SQL are deliberately contrary, by having parameters lists that are not the convent...
What does a just-in-time (JIT) compiler do?
...s a JIT compiler specifically do as opposed to a non-JIT compiler? Can someone give a succinct and easy to understand description?
...
AngularJS directive with default options
...nController',
compile: function(element, attrs){
if (!attrs.attrOne) { attrs.attrOne = 'default value'; }
if (!attrs.attrTwo) { attrs.attrTwo = 42; }
},
...
}
});
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What is the most robust way to force a UIView to redraw?
...dsDisplay]. If you're having trouble with that, you're likely running into one of these issues:
You're calling it before you actually have the data, or your -drawRect: is over-caching something.
You're expecting the view to draw at the moment you call this method. There is intentionally no way to ...
How to parse XML to R data frame
... temperature lists. Then you need extract both the lists, look within each one, and pick the one that has "hourly" as one of its values. Then you need to select only that list but only keep the values that have the "value" label:
temps <- xml_data[["data"]][["parameters"]]
temps <- temps[name...
Bash script to receive and repass quoted parameters
...uments). I tried foovar="$@" and foovar=$@ + "$foovar"in the function and none worked :-/
– bitifet
Jan 31 '18 at 13:56
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Mercurial for Beginners: The Definitive Practical Guide
...ce with Subversion?
There are three ways:
The convert extension will clone an existing Subversion repository into a Mercurial one. It comes with Mercurial. It works roughly like this:
hg convert <Subversion URL or directory> <path to new Mercurial repository>
For example this wi...
Proper usage of Java -D command-line parameters
...her words, the way you've got it at the moment will treat -Dtest="true" as one of the arguments to pass to main instead of as a JVM argument.
(You should probably also drop the quotes, but it may well work anyway - it probably depends on your shell.)
...
How does IPython's magic %paste work?
... and hit enter.
For example:
In [1]: %cpaste
Pasting code; enter '--' alone on the line to stop or use Ctrl-D.
:for l in "Hello World":
: print l,
:--
H e l l o W o r l d
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Is it a good idea to index datetime field in mysql?
...base. In my application I will have many rows for example I currently have one table with 4 million records. Most of my queries use datetime clause to select data. Is it a good idea to index datetime fields in mysql database?
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