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What is a callback URL in relation to an API?
...
Think of it as a letter. Sometimes you get a letter, say asking you to fill in a form then return the form in a pre-addressed envelope which is in the original envelope that was housing the form.
Once you have finished filling the form in, y...
lexers vs parsers
...t from their input.
Hint: The alphabet doesn't necessarily have to be of letters. But it
has to be of symbols which are atomic for the language
understood by parser/lexer.
Symbols for the lexer: ASCII characters.
Symbols for the parser: the particular tokens, which are terminal symbols of their gr...
What is the best way to do a substring in a batch file?
...ands %I to a fully qualified path name
%~dI - expands %I to a drive letter only
%~pI - expands %I to a path only
%~nI - expands %I to a file name only
%~xI - expands %I to a file extension only
%~sI - expanded path contains short names only
%~aI - expands %I...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
Why does the C preprocessor in GCC interpret the word linux (small letters) as the constant 1 ?
5 Answers
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How to convert a data frame column to numeric type?
..."conversion anomaly":
# create dummy data.frame
d <- data.frame(char = letters[1:5],
fake_char = as.character(1:5),
fac = factor(1:5),
char_fac = factor(letters[1:5]),
num = 1:5, stringsAsFactors = FALSE)
Let us have a glance ...
Best architectural approaches for building iOS networking applications (REST clients)
... or build your own lightweight object mapping/persistence layer, based on raw SQLite or LevelDB. Also I advice you to familiarize yourself with the Domain Driven Design and CQRS.
At first, I think, we should create another layer for networking, because we don't want fat controllers or heavy, overwh...
Regular expression matching a multiline block of text
...lines) is put in the first group.
[A-Z]+\n means "match as many upper case letters as possible until you reach a newline. This defines what I will call a textline.
((?:textline)+) means match one or more textlines but do not put each line in a group. Instead, put all the textlines in one group.
You...
When are you truly forced to use UUID as part of the design?
... @Chamnap I wrote UUIDTools. UUIDs can be converted to an integer or their raw byte form, and would be substantially smaller as a binary.
– Bob Aman
Jun 10 '12 at 14:21
1
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What is the fastest substring search algorithm?
...ing feature of the algorithm is that it is quite simple to prove that each letter is examined at most once. For earlier Boyer-Moore versions they proved that each letter is examined at most 3 and later 2 times at most, and those proofs were more involved (see cites in paper). Therefore I also see ...
How are parameters sent in an HTTP POST request?
...iables are stored as key-value pairs in the body.
You can see this in the raw content of an HTTP Post, shown below:
POST /path/script.cgi HTTP/1.0
From: frog@jmarshall.com
User-Agent: HTTPTool/1.0
Content-Type: application/x-www-form-urlencoded
Content-Length: 32
home=Cosby&favorite+flavor=fl...