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Why hasn't functional programming taken over yet?
...ch for the sorts of problems we face. Our problems are all about taking in raw information -- strings and metadata -- and transforming them into different strings and metadata. In situations where mutations occur, like someone is typing in the IDE, the problem space inherently lends itself to functi...
Fastest way to determine if an integer's square root is an integer
... fast convert-to-long function so integer operations can be applied on the raw bytes.
the 0x5f3759df - (i >> 1); line is a pre-calculated seed value for the approximation function.
the * (float*) &i converts the value back to floating point.
the y = y * ( threehalfs - ( x2 * y * y ) ) lin...
How can I parse a CSV string with JavaScript, which contains comma in data?
...tive regular expressions syntax (expressed using Python's handy r'''...''' raw-multi-line-string syntax).
First here is a regular expression which validates that a CVS string meets the above requirements:
Regular expression to validate a "CSV string":
re_valid = r"""
# Validate a CSV string having s...
Improving bulk insert performance in Entity framework [duplicate]
...sing custom stored procedure accepting table valued parameter but you need raw ADO.NET for that.
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How to avoid null checking in Java?
...ace Parser {
Action findAction(String userInput);
}
where Parser takes raw user input and finds something to do, perhaps if you're implementing a command line interface for something. Now you might make the contract that it returns null if there's no appropriate action. That leads the null che...
source of historical stock data [closed]
...o uses a different "corporate events" data provider and then just uses the raw CSI data adjusted by the corporate events. This somewhat old article gives some insight: amibroker.org/userkb/2007/09/23/yahoos-data-providers
– lukebuehler
Jul 8 '13 at 2:45
...
What is Unicode, UTF-8, UTF-16?
... data types: How are they encoded in the programming language? If they are raw bytes, the minute you try to output non-ASCII characters, you may run into a few problems. Also, even if the character type is based on a UTF, that doesn't mean the strings are proper UTF. They may allow byte sequences th...
Regular expression for floating point numbers
...ping can get very confusing. If the language you are working with supports raw strings, then you should use those to cut down on the number of backslashes, but not all languages do (most notably: Java). Fortunately, there's an alternative that will work some of the time:
String correctPattern = "[....
How fast is D compared to C++?
... -boundscheck=off <sourcefile>
Results
The results (screenshot of raw console output) of each version of the source as follows:
scalar.cpp (original C++):
allocation: 2 ms
random generation: 12 ms
result: 29248300000
time: 2582 ms
C++ sets the standard at 2582 ms.
scalar.d (modifi...
How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...
CCM: A nonce-based AEAD scheme that combines CTR mode encryption and the raw
CBC-MAC. Inherently serial, limiting speed in some contexts. Provably secure, with good bounds, assuming the underlying blockcipher is a good PRP. Ungainly construction that demonstrably does the job. Simpler to implement...