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Optional query string parameters in ASP.NET Web API
...sue has been fixed in the regular release of MVC4.
Now you can do:
public string GetFindBooks(string author="", string title="", string isbn="", string somethingelse="", DateTime? date= null)
{
// ...
}
and everything will work out of the box.
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Extract traceback info from an exception object
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A way to get traceback as a string from an exception object in Python 3:
import traceback
# `e` is an exception object that you get from somewhere
traceback_str = ''.join(traceback.format_tb(e.__traceback__))
traceback.format_tb(...) returns a list ...
difference and when to use getApplication(), getApplicationContext(), getBaseContext() and someClass
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@committedandroider because activity context contains extra info for the chosen theme, so when views are created in code then the correct theme will be applied automatically. For more info, you may read this
– waqaslam
Nov 30 '14 at 6:51
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How to get the Full file path from URI
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Use:
String path = yourAndroidURI.uri.getPath() // "/mnt/sdcard/FileName.mp3"
File file = new File(new URI(path));
or
String path = yourAndroidURI.uri.toString() // "file:///mnt/sdcard/FileName.mp3"
File file = new File(new URI...
What resources are shared between threads?
...gment from the DATA segment. Sometimes there is RODATA (Data like constant strings that can be in pages marked Read Only). Some systems even break DATA into SMALL DATA (accessible from a base + 16-bit offset) and (FAR) DATA (32-bit offset required to access). It's also possible that there is an extr...
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...
Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
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Q: What is the difference between these initializations?
char a[] = "string literal";
char *p = "string literal";
My program crashes if I try to assign a new value to p[i].
A: A string literal (the formal term
for a double-quoted string in C
source) can be used in two slightly
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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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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....
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...