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Validating with an XML schema in Python
...xslt-devel
The simplest validator
Let's create simplest validator.py
from lxml import etree
def validate(xml_path: str, xsd_path: str) -> bool:
xmlschema_doc = etree.parse(xsd_path)
xmlschema = etree.XMLSchema(xmlschema_doc)
xml_doc = etree.parse(xml_path)
result = xmlsch...
Is there a way to reduce the size of the git folder?
...r possibly relevant command is git clean which will delete untracked files from your tree (manual page).
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How to modify a global variable within a function in bash?
...(...) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way - a subshell cannot modify the environment of its parent shell. Your variable e is set within a subshell, but not the parent shell. There are two ways to pass values from ...
Extract numbers from a string
I want to extract the numbers from a string that contains numbers and letters like:
20 Answers
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Why does auto a=1; compile in C?
...so the same as int a in this example.
This keyword is actually a leftover from C's predecessor B, where there were no base types: everything was int, pointer to int, array of int.(*) Declarations would be either auto or extrn [sic]. C inherited the "everything is int" as a default rule, so you coul...
Why can't strings be mutable in Java and .NET?
...,
immutable objects can be shared freely
[...]
Other small points from the same chapter:
Not only can you share immutable objects, but you can share their internals.
[...]
Immutable objects make great building blocks for other objects, whether mutable or immutable.
[...]
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Tool for generating railroad diagram used on json.org [closed]
...enerator. It creates SVG syntax diagrams, also known as railroad diagrams, from context-free grammars specified in EBNF. You can copy the SVG code or take screen shots.
You have to type in the grammar and it'll make the diagram.
For example, to create the first railroad diagram you show, you would...
Exec : display stdout “live”
...tdout/stderr events (spawn.stdout.on('data',callback..)) as they happen.
From NodeJS documentation:
var spawn = require('child_process').spawn,
ls = spawn('ls', ['-lh', '/usr']);
ls.stdout.on('data', function (data) {
console.log('stdout: ' + data.toString());
});
ls.stderr.on('data'...
Why aren't superclass __init__ methods automatically invoked?
...__new__". As you yourself note, __new__ behaves nothing like a constructor from other languages. __init__ is in fact very similar (it is called during the creation of a new object, after that object is allocated, to set member variables on the new object), and is almost always the place to implement...
Why fragments, and when to use fragments instead of activities?
...le by using includes). However; fragments are wired in to the Android API, from HoneyComb, and up. Let me elaborate;
The ActionBar. If you want tabs up there to navigate your app, you quickly see that ActionBar.TabListener interface gives you a FragmentTransaction as an input argument to the onTab...