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How can I output leading zeros in Ruby?
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Use the % operator with a string:
irb(main):001:0> "%03d" % 5
=> "005"
The left-hand-side is a printf format string, and the right-hand side can be a list of values, so you could do something like:
irb(main):002:0> filename = "%s/%s.%04d....
Pagination in a REST web application
...ource, it's a property of the request. That makes me chose option 1 query string only. It just feels right. I really like how the Twitter API is structured restfully. Not too simple, not too complicated, well documented. For better or worse it's my "go to" design when I am on the fence on doing...
Relative paths in Python
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os.path.dirname(__file__) can give an empty string, use os.path.dirname(os.path.abspath(__file__)) instead
– Dmitry Trofimov
Mar 10 '15 at 22:03
15
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How do I search for an object by its ObjectId in the mongo console?
...d = '58c85d1b7932a14c7a0a320d';
let o_id = new ObjectId(id); // id as a string is passed
db.collection.findOne({"_id":o_id});
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Android splash screen image sizes to fit all devices
...ldpi ~ 120dpi)
Medium Density (mdpi ~ 160dpi)
High Density (hdpi ~ 240dpi)
Extra-High Density (xhdpi ~ 320dpi)
(These dpi values are approximations, since custom built devices will have varying dpi values)
What you (if you're a designer) need to know from this is that Android basically chooses fro...
What is the smallest possible valid PDF?
...4-representation of a PDF. So, if anyone is interested, here is the base64-string of the 138 bytes version: JVBERi0xLjAKMSAwIG9iajw8L1BhZ2VzIDIgMCBSPj5lbmRvYmogMiAwIG9iajw8L0tpZHNbMyAw\nIFJdL0NvdW50IDE+PmVuZG9iaiAzIDAgb2JqPDwvTWVkaWFCb3hbMCAwIDMgM10+PmVuZG9iagp0\ncmFpbGVyPDwvUm9vdCAxIDAgUj4+Cg==
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How can I access and process nested objects, arrays or JSON?
...a key -> value structure. Keys in an array must be numeric, whereas any string can be used as key in objects. The key-value pairs are also called the "properties".
Properties can be accessed either using dot notation
const value = obj.someProperty;
or bracket notation, if the property name wo...
ViewPager and fragments — what's the right way to store fragment's state?
...y FragmentPagerAdapter
switch (position) {
case 0:
String firstTag = createdFragment.getTag();
break;
case 1:
String secondTag = createdFragment.getTag();
break;
}
// ... save the tags somewhere so you can reference them lat...
How to set target hosts in Fabric file
...file.org/issues/show/138#change-1497) it is better to include user in host string (like produser@prod.server.com) instead of setting env.user.
– Mikhail Korobov
Feb 16 '11 at 0:45
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Validating an XML against referenced XSD in C#
...hemaNamespace, schemaFileName);
XDocument doc = XDocument.Load(filename);
string msg = "";
doc.Validate(schemas, (o, e) => {
msg += e.Message + Environment.NewLine;
});
Console.WriteLine(msg == "" ? "Document is valid" : "Document invalid: " + msg);
See the MSDN documentation for more assi...