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Extract value of attribute node via XPath
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What if I have a list of attributes and I need their values? string() seems to return just the first value.
– Konstantin Milyutin
Sep 18 '19 at 19:24
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Is there a standard naming convention for git tags? [closed]
... code. Using this system allows automated tools to inspect your
package and determine SemVer compliance and released versions.
When tagging releases in a version control system, the tag for a version MUST be
"vX.Y.Z" e.g. "v3.1.0".
However, after discussion this was removed, and i...
How to truncate the time on a DateTime object in Python?
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Note that python 2 and python 3 docs both state that the replace() method returns a datetime object, so the correct incantation would be: dt = datetime.datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
– Br...
Generate a random letter in Python
Is there a way to generate random letters in Python (like random.randint but for letters)? The range functionality of random.randint would be nice but having a generator that just outputs a random letter would be better than nothing.
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In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
...you explicitly do "0" == false, both sides are being converted to numbers, and then the comparison is performed.
When you do: if ("0") console.log("ha"), the string value is being tested. Any non-empty string is true, while an empty string is false.
Equal (==)
If the two operands are not o...
Working with select using AngularJS's ng-options
...gularJS actually allows you to select entire objects with select controls, and not just primitive types. For example:
app.controller('MainCtrl', function($scope) {
$scope.items = [
{ id: 1, name: 'foo' },
{ id: 2, name: 'bar' },
{ id: 3, name: 'blah' }
];
});
<div ng-contr...
Default parameters with C++ constructors [closed]
...efault parameters, so long as the parameters make sense. Classes in the standard use them as well, which speaks in their favor.
One thing to watch out for is if you have defaults for all but one parameter, your class can be implicitly converted from that parameter type. Check out this thread for ...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
There are a set of questions that seem to be commonly-used in interviews and classes when it comes to object-oriented design and analysis. This is one of them; unfortunately, my OOP professor in college never actually gave an answer to it, and so I've been wondering.
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How can I find the version of the Fedora I use?
...on't work if anyone's changed the login banners … I typically edit mine, and so, it seems, do many (most) corporate IT departments... :-(
– BRPocock
Dec 2 '11 at 16:05
8
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ORA-00979 not a group by expression
...ults to a single value (like MIN, MAX or SUM).
A simple example to understand why this happens: Imagine you have a database like this:
FOO BAR
0 A
0 B
and you run SELECT * FROM table GROUP BY foo. This means the database must return a single row as result with the first column 0 to fulfill t...