The action of retrieving data from a string
String parsing is the action of extracting or modifying data pieces from a string. For example, one might parse a string to remove all quotation marks or to find all items inside quotation marks.
Questions tagged [string-parsing]
970 questions
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c#. Parse and find some word in string
I have some string
bla bla bla bla
What is the best and fastest way to get text inside <>?
Ievgen
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Why can I not reverse the result of str::split?
According to the docs for Split, there is a rev method on the result of doing split on a string:
fn main() {
let mut length = 0;
let mut mult = 1;
for part in "1:30".split(":").rev() {
length += mult *…
Bilal Syed Hussain
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How to get the name of the parent folder of a file specified by its full path?
In Matlab, I have a string containing a path to a file:
path = 'C:/Data/Matlab/Dir/file.m'
I want now want to extract the 'Dir' part of the string. One way to do this is:
[first, second, third, fourth, fifth] = strtok(path, '/')
And then take the…
Karnivaurus
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How to display returned JSON from a jQuery .ajax post
I am starting work on a project that is built completely on JSON data. It is returned like this:
{"location":{"id":10,"contactPhone":"8675309","contactName":"bob","name":"bill smith","zipCode":"90210","state":"California","address1":"104 S.…
Dirty Bird Design
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Are there character collections for all international full stop punctuations?
I am trying to parse utf-8 strings into "bite sized" segments. For example, I would like to break down a text into "sentences".
Is there a comprehensive collection of characters (or regex) that correspond to end of sentences in all languages? I'm…
JDelage
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4 answers
Javascript math parser library
Is there a good math parser in Javascript? I want to be able to parse something like:
LOG(3.14)+5^2+POW(2,LN(X*2,Y))
Thanks,
Mark K
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troubles with compiling a c++ file including exprTk
I have some troubles compiling a c++ code including exprtk. I want to compile an given example of the package (I called it parser.cpp):
#include
#include
#include "exprtk.hpp"
template
void trig_function()
{
…
Daniel
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3 answers
DateTime.ParseExact - how to parse single- and double-digit hours with same format string?
I want to be able to parse strings of time (hours, minutes, seconds) where the hours run from 0 to 23, and where the preceding zero for one-digit hours is optional.
Examples of time strings that I want to be able to parse into valid DateTime…
Anders Gustafsson
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How safe is SymPy's sympify().evalf()?
We know Python's eval() is evil
http://nedbatchelder.com/blog/201206/eval_really_is_dangerous.html
and threads throughout StackOverflow suggest to use SymPy's evalf().
As a Python newbie, I can't really convince myself that evalf() is safe as I lack…
arney
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How can I extract an integer from within a string?
I'm working on an assignment and as part of it I need to extract the integer from a string.
I've tried using the atoi() function, but it always returns a 0, so then I switched up to strtol(), but it still returns a 0.
The goal is to extract the…
Ramux05
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How to use `strtoul` to parse string where zero may be valid?
According to the documentation for strtoul, regarding its return value...
This function returns the converted integral number as a long int value. If no valid conversion could be performed, a zero value is returned.
What if I'm parsing a…
Jim Fell
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3 answers
Good practices for parsing user inputs with special characters?
Greetings, I am the program writer for the rebellion against the evil galactic empire. Right now, we are preparing for a daring assault on the Death Star.
I have created a vast database of information about our pilots, droids, and systems aboard…
Vivian River
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ParseException: Unparseable date: "Wed Mar 30 00:00:00 GMT+05:30 2016" (at offset 4)
Im trying parse a String with a date to convert it into a Date format. Strings are in the following format.
Wed Mar 30 00:00:00 GMT+05:30 2016
But when im parsing the String i get a error saying,
java.text.ParseException: Unparseable date: "Wed Mar…
Ryan Aluvihare
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Can I use python 're' to parse complex human names?
So one of my major pain points is name comprehension and piecing together household names & titles. I have a 80% solution with a pretty massive regex I put together this morning that I probably shouldn't be proud of (but am anyway in a kind of sick…
mzniko
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How do you get an unsigned long out of a string?
What's the safest and best way to retrieve an unsigned long from a string in C++?
I know of a number of possible methods.
First, converting a signed long taken from atol.
char *myStr; // Initalized to some value somehow.
unsigned long n =…
Daniel Bingham
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