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How does the Google “Did you mean?” Algorithm work?
...ords as trigrams or bigrams, so that when you are performing a lookup, you convert to n-gram, and lookup via hashtable or trie.
Use heuristics related to potential keyboard mistakes based on character location. So that "hwllo" should be "hello" because 'w' is close to 'e'.
Use a phonetic key (Sounde...
Pandas every nth row
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I'd use iloc, which takes a row/column slice, both based on integer position and following normal python syntax.
df.iloc[::5, :]
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How to compare two dates?
...time(date1, "%d/%m/%Y") and newdate2 = time.strptime(date2, "%d/%m/%Y") to convert them to python's date format. Then, the comparison is obvious:
newdate1 > newdate2 will return False
newdate1 < newdate2 will return True
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How to create a colored 1x1 UIImage on the iPhone dynamically?
...with color: UIColor) -> UIImage {
let rect = CGRect(origin: CGPoint(x: 0, y:0), size: CGSize(width: 1, height: 1))
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()!
context.setFillColor(color.cgColor)
context.fill(rect)
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namedtuple and default values for optional keyword arguments
I'm trying to convert a longish hollow "data" class into a named tuple. My class currently looks like this:
21 Answers
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c# open file with default application and parameters
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I converted the VB code in the blog post linked by xsl to C# and modified it a bit:
public static bool TryGetRegisteredApplication(
string extension, out string registeredApp)
{
string extensionId = Ge...
How to find gaps in sequential numbering in mysql?
... far faster than the accepted answer. The only thing that I'd add is that CONVERT( YourCol, UNSIGNED ) will give better results if YourCol isn't already an integer.
– Barton Chittenden
Feb 10 '17 at 23:36
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Why does parseInt yield NaN with Array#map?
...seInt: it doesn't parse the string and returns NaN if the number cannot be converted. For instance:
console.log(parseInt("19asdf"));
console.log(Number("19asf"));
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What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First?
...ion<T> only.
They cannot be a concrete
implementation or another interface
that derives from ICollection<T> (a
difference from the Deferred Loading
proxy)
Another useful link describing this is MSDN's Requirements for Creating POCO Proxies.
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What is the difference between Hibernate and Spring Data JPA
...like findByNameOrderByAge(String name); that will be parsed in runtime and converted into appropriate JPA queries.
Its placement atop of JPA makes its use tempting for:
Rookie developers who don't know SQL or know it badly. This is a
recipe for disaster but they can get away with it if the projec...