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Why does .NET foreach loop throw NullRefException when collection is null?
...umerable.Empty<int>())
{
System.Console.WriteLine(string.Format("{0}", i));
}
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Chrome Extension - Get DOM content
.../ the web-page's DOM content as argument
sendResponse(document.all[0].outerHTML);
}
});
manifest.json:
{
"manifest_version": 2,
"name": "Test Extension",
"version": "0.0",
...
"background": {
"persistent": false,
"scripts": ["background.js"]
},
"content_scripts"...
What is the difference between range and xrange functions in Python 2.X?
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In Python 2.x:
range creates a list, so if you do range(1, 10000000) it creates a list in memory with 9999999 elements.
xrange is a sequence object that evaluates lazily.
In Python 3, range does the equivalent of python's xrange, and to get the list, you have to use list(range(.....
How are Python's Built In Dictionaries Implemented?
...w is a logical representation of a Python hash table. In the figure below, 0, 1, ..., i, ... on the left are indices of the slots in the hash table (they are just for illustrative purposes and are not stored along with the table obviously!).
# Logical model of Python Hash table
-+---------------...
Microsoft Web API: How do you do a Server.MapPath?
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edited Feb 9 '18 at 1:08
Frederik Struck-Schøning
11.3k77 gold badges5353 silver badges6262 bronze badges
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Maximum length of HTTP GET request
...cific error/exception when the POST limit is exceeded, usually as an HTTP 500 error.
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Does PNG contain EXIF data like JPG?
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Edit: Version 1.5.0 (July 2017) of the Extensions to the PNG 1.2 Specification has finally added an EXIF chunk. It remains to be seen if encoders-decoders begin to support it.
Original: PNG does not embed EXIF info. It allows, however, to emb...
How do I get the coordinates of a mouse click on a canvas element?
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Edit 2018: This answer is pretty old and it uses checks for old browsers that are not necessary anymore, as the clientX and clientY properties work in all current browsers. You might want to check out Patriques Answer for a simpler...
Correct way to write loops for promise.
...dition, action));
});
promiseFor(function(count) {
return count < 10;
}, function(count) {
return db.getUser(email)
.then(function(res) {
logger.log(res);
return ++count;
});
}, 0).then(console.log.bind(console, 'all done'));
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Lazy Method for Reading Big File in Python?
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440
To write a lazy function, just use yield:
def read_in_chunks(file_object, chunk_size=1024):
...