Solve your most difficult business problems
FICO Xpress Optimization offers powerful and versatile solvers and flexible language support to model more accurately and solve highly complex, real-world problems. FICO offers a complete set of industry leading solver technologies.
FICO Xpress Optimization offers powerful and versatile solvers and flexible language support to model more accurately and solve highly complex, real-world problems. FICO offers a complete set of industry leading solver technologies.
Rapidly increase business value
This allows FICO Xpress Optimization to process millions of variables at great speed and scalability, enabling business users to find better decisions to complex problems in minutes.
This allows FICO Xpress Optimization to process millions of variables at great speed and scalability, enabling business users to find better decisions to complex problems in minutes.
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Machine learning and artificial intelligence
FICO Xpress Optimization technology is designed to integrate with existing and future machine learning tools and processes. Proven integrations include: the entire R ecosystem; model scores input as data; all PMML formats; MATLAB code and data; external executable scripts; callable “black-box” models in Java or as external scripts; the entire Python ecosystem.
FICO Xpress Optimization technology is designed to integrate with existing and future machine learning tools and processes. Proven integrations include: the entire R ecosystem; model scores input as data; all PMML formats; MATLAB code and data; external executable scripts; callable “black-box” models in Java or as external scripts; the entire Python ecosystem.
Allows every type of user to successfully utilize optimization
FICO offers optimization products, solutions, and services that allow every level of user to successfully apply optimization to solve business problems, including features and functionality for business users and analysts, solution developers, data scientists and operation research professionals.
FICO offers optimization products, solutions, and services that allow every level of user to successfully apply optimization to solve business problems, including features and functionality for business users and analysts, solution developers, data scientists and operation research professionals.
Regular expressions are not only good for searching text; they're good at manipulating it. And one of the most common text manipulation tasks is search-and-replace. xpressive provides the
regex_replace()
algorithm for searching and replacing. regex_replace()
Performing search-and-replace using
regex_replace()
is simple. All you need is an input sequence, a regex object, and a format string or a formatter object. There are several versions of the regex_replace()
algorithm. Some accept the input sequence as a bidirectional container such as std::string
and returns the result in a new container of the same type. Others accept the input as a null terminated string and return a std::string
. Still others accept the input sequence as a pair of iterators and writes the result into an output iterator. The substitution may be specified as a string with format sequences or as a formatter object. Below are some simple examples of using string-based substitutions. The above program prints out the following:
Notice that all the occurrences of
'his'
have been replaced with 'her'
. Affinity photo 1 3 5 download free. Click here to see a complete example program that shows how to use
regex_replace()
. And check the regex_replace()
reference to see a complete list of the available overloads. Replace Options
The
regex_replace()
algorithm takes an optional bitmask parameter to control the formatting. The possible values of the bitmask are: Table 1.7. Format Flags
Flag | Meaning |
---|---|
format_default | Recognize the ECMA-262 format sequences (see below). |
format_first_only | Only replace the first match, not all of them. |
format_no_copy | Don't copy the parts of the input sequence that didn't match the regex to the output sequence. |
format_literal | Treat the format string as a literal; that is, don't recognize any escape sequences. |
format_perl | Recognize the Perl format sequences (see below). |
format_sed | Recognize the sed format sequences (see below). |
format_all | In addition to the Perl format sequences, recognize some Boost-specific format sequences. |
These flags live in the
xpressive::regex_constants
namespace. If the substitution parameter is a function object instead of a string, the flags format_literal
, format_perl
, format_sed
, and format_all
are ignored. The ECMA-262 Format Sequences
When you haven't specified a substitution string dialect with one of the format flags above, you get the dialect defined by ECMA-262, the standard for ECMAScript. The table below shows the escape sequences recognized in ECMA-262 mode.
Table 1.8. Format Escape Sequences
Escape Sequence | Meaning |
---|---|
$1 , $2 , etc. | the corresponding sub-match |
$& | the full match |
$` | the match prefix |
$' | the match suffix |
$$ | a literal '$' character |
Any other sequence beginning with
'$'
simply represents itself. For example, if the format string were '$a'
then '$a'
would be inserted into the output sequence. The Sed Format Sequences
When specifying the
format_sed
flag to regex_replace()
, the following escape sequences are recognized: Table 1.9. Sed Format Escape Sequences
Escape Sequence | Meaning |
---|---|
1 , 2 , etc. | The corresponding sub-match |
& | the full match |
a | A literal 'a' |
e | A literal char_type(27) |
f | A literal 'f' |
n | A literal 'n' |
r | A literal 'r' |
t | A literal 't' |
v | A literal 'v' |
xFF | A literal char_type(0xFF) , where F is any hex digit |
x{FFFF} | A literal char_type(0xFFFF) , where F is any hex digit |
cX | The control character X |
![Xpressive Xpressive](https://i.ytimg.com/vi/ws9-HKyef1U/maxresdefault.jpg)
The Perl Format Sequences
Proof That 1 Equals 0
When specifying the
format_perl
flag to regex_replace()
, the following escape sequences are recognized: Table 1.10. Perl Format Escape Sequences
Escape Sequence | Meaning |
---|---|
the corresponding sub-match | |
$& | the full match |
$` | the match prefix |
$' | the match suffix |
$$ | a literal '$' character |
a | A literal 'a' |
e | A literal char_type(27) |
f | A literal 'f' |
A literal 'n' | |
r | A literal 'r' |
t | A literal 't' |
v | A literal 'v' |
xFF | A literal char_type(0xFF) , where F is any hex digit |
x{FFFF} | A literal char_type(0xFFFF) , where F is any hex digit |
cX | The control character X |
l | Make the next character lowercase |
L | Make the rest of the substitution lowercase until the next E |
u | Make the next character uppercase |
U | Make the rest of the substitution uppercase until the next E |
E | Terminate L or U |
1 , 2 , etc. | The corresponding sub-match |
g<name> | The named backref name |
Xpressive 1 0 9 Apk
The Boost-Specific Format Sequences
When specifying the
format_all
flag to regex_replace()
, the escape sequences recognized are the same as those above for format_perl
. In addition, conditional expressions of the following form are recognized: where N is a decimal digit representing a sub-match. If the corresponding sub-match participated in the full match, then the substitution is true-expression. Otherwise, it is false-expression. In this mode, you can use parens
()
for grouping. If you want a literal paren, you must escape it as (
. Formatter Objects
Format strings are not always expressive enough for all your text substitution needs. Consider the simple example of wanting to map input strings to output strings, as you may want to do with environment variables. Rather than a format string, for this you would use a formatter object. Consider the following code, which finds embedded environment variables of the form
'$(XYZ)'
and computes the substitution string by looking up the environment variable in a map. In this case, we use a function,
format_fun()
to compute the substitution string on the fly. It accepts a match_results<>
object which contains the results of the current match. format_fun()
uses the first submatch as a key into the global env
map. The above code displays: Xpressive 1 0 90
The formatter need not be an ordinary function. It may be an object of class type. And rather than return a string, it may accept an output iterator into which it writes the substitution. Consider the following, which is functionally equivalent to the above.
1 Equals 0
The formatter must be a callable object -- a function or a function object -- that has one of three possible signatures, detailed in the table below. For the table,
fmt
is a function pointer or function object, what
is a match_results<>
object, out
is an OutputIterator, and flags
is a value of regex_constants::match_flag_type
: Table 1.11. Formatter Signatures
Formatter Invocation | Return Type | Semantics |
---|---|---|
fmt(what) | Range of characters (e.g. std::string ) or null-terminated string | The string matched by the regex is replaced with the string returned by the formatter. |
fmt(what,out) | OutputIterator | The formatter writes the replacement string into out and returns out . |
fmt(what,out,flags) | OutputIterator | The formatter writes the replacement string into out and returns out . The flags parameter is the value of the match flags passed to the regex_replace() algorithm. |
Formatter Expressions
In addition to format strings and formatter objects,
regex_replace()
also accepts formatter expressions. A formatter expression is a lambda expression that generates a string. It uses the same syntax as that for Semantic Actions, which are covered later. The above example, which uses regex_replace()
to substitute strings for environment variables, is repeated here using a formatter expression. 1x0=
In the above, the formatter expression is
ref(env)[s1]
. This means to use the value of the first submatch, s1
, as a key into the env
map. The purpose of xpressive::ref()
here is to make the reference to the env
local variable lazy so that the index operation is deferred until we know what to replace s1
with.