I have a text file which read:
config<001>25
23<220>12
.....
how can i parse so that i need only the values config,001(to be converted into integer after extracting using strtok or any ohter methods please suggest), and 25(to be converted into integer) seperately. i tries strtok its not working as the way i need. Please help me.
Use LINQ 2 SQL to import the file on the delimiters and then use something like AutoMapper to do the mapping of fields to say specific objects with specific types.
I did this exact thing in another project and it works great.
Based on the mention of strtok I'm guessing that you're using C or C++. If you're using C++, I'd probably handle this by creating a ctype facet that treats < and > as white space, which will make the parsing trivial (infile >> string >> number1 >> number2;).
If you're using C, you can use the scan-set conversion with scanf, something like: sscanf(line, "%[^<] %d> %d", string, &number1, &number2);
Related
I'm new to GREP in BBEdit. I need to find a string inside an XML file. Such string is enclosed in quotes. I need to replace only what's inside the quotes.
The problem is that the replacement string starts with a number thus confuses BBEdit when I put together the replacement pattern. Example:
Original string in XML looks like this:
What I need to replace it with:
01 new file name.png
My grep search and replace patterns:
Using the replacement pattern above, BBEdit wrongly thinks that the first backreference is "\101" when what I really need it understand is that I mean "\01".
TIA for any help.
Your example is highly artificial because in fact there is no need for your \1 or \3 as you know their value: it is " and you can just type that directly to get the desired result.
"01 new file name.png"
However, just for the sake of completeness, the answer to your actual question (how to write a replacement group number followed by a number) is that you write this:
\0101 new file name.png\3
The reason that works is that there can only be 99 capture groups, so \0101 is parsed as \01 (the first capture group) followed by literal 01.
I'm trying to automate some output using printf but I'm struggling to find a way to pass to it the list of arguments expr_1, ..., expr_n in
printf (dest, string, expr_1, ..., expr_n)
I thought of using something like Javascript's spread operator but I'm not even sure I should need it.
For instace, say I have a list of strings to be output
a:["foo","bar","foobar"];
a string of appropriate format descriptors, say
s: "~a ~a ~a ~%";
and an output stream, say os. How can I invoke printf using these things in such a way that the result will be the same as writing
printf(os,s,a[1],a[2],a[3]);
Then I could generalize it to output lists of variable size.
Any suggestions?
Thanks.
EDIT:
I just learned about apply and, using the conditions I posed in my OP, the following seems to work wonderfully:
apply(printf,append([os,s],a));
Maxima printf implements most or maybe all of the formatting operators from Common Lisp FORMAT, which are quite extensive; see: http://www.lispworks.com/documentation/HyperSpec/Body/22_c.htm See also ? printf in Maxima to get an abbreviated list of formatting operators.
In particular for a list you can do something like:
printf (os, "my list: ~{~a~^, ~}~%", a);
to get the elements of a separated by ,. Here "~{...~}" tells printf to expect a list, and ~a is how to format each element, ~^ means omit the inter-element stuff after the last element, and , means put that between elements. Of course , could be anything.
There are many variations on that; if that's not what you're looking for, maybe I can help you find it.
Is there a way to use a heredoc type of notation in Lua that references variables within the string?
The basic idea of what I'm trying to do would look something like follows. The heredoc piece is fine, but within Lua you can't actually reference the variable in the manner I'm showing below.
username = "bigtunacan"
sql=[=[
SELECT * FROM users WHERE username='$bigtunacan';
]=]
There's no built-in string interpolation, but it can be trivially implemented with gsub and replacement table.
sql=[=[
SELECT * FROM users WHERE username='$username';
]=]
print((sql:gsub('$(%w+)', { username = 'bigtucan' })))
-- SELECT * FROM users WHERE username='bigtucan';
Note an extra set of () - this is so only first return - the interpolated string is used from gsub and the 2nd - number of replacements made - silently discarded. This might be important if you use result of gsub as last in list of arguments to some function where adding one more argument might produce different behavior.
Also if you want to use this in SQL context, you really should use placeholders instead.
There is no Lua construct that allows variable interpolation within any string. See Literal Strings in the official reference guide.
You could of course write a function that would parse it and do the substitutions.
In sqlite I:
Perform a create virtual MyTable (tokenize =icu ,id text,subject text,abstract text)
Then successfully insert info MyTable (id,subject,abstract) values (?,?,?)
so I have the row： 今天天气不错fmowomrogmeog，wfomgomrg，我是谁erz
When I perform select id from MyTable where MyTable match ‘z*’ it does not return anything，Whenever I search the single letter it returns nothing. However if I search ‘m’ or ‘天气’ or ‘天’，it works.
I know sqlite only support prefix, so I am using ICU. Am I making a mistake?
Note I've looked at the source code on foxmail,it looks to me like I can search ',' 'f' and so on.
Try Hai Feng Kao's character tokenizer. It can search prefix, postfix and anything in between. It supports Chinese as well. I don't think you can find any other tokenizers which support arbitrarily substring search.
BTW, it is a shameless self-promotion.
If you want to open a database encoded by character tokenizer in Objective-C, do the following:
#import <FMDB/FMDatabase.h>
#import "character_tokenizer.h"
FMDatabase* database = [[FMDatabase alloc] initWithPath:#"my_database.db"];
if ([database open]) {
// add FTS support
const sqlite3_tokenizer_module *ptr;
get_character_tokenizer_module(&ptr);
registerTokenizer(database.sqliteHandle, "character", ptr);
}
You may also try FMDB's FMSimpleTokenizer. FMSimpleTokenizer uses build-in CFStringTokenizer and according to apple document "CFStringTokenizer allows you to tokenize strings into words, sentences or paragraphs in a language-neutral way. It supports languages such as Japanese and Chinese that do not delimit words by spaces"
If you check FMSimpleTokenizer code, you will find that is done by calling CFStringTokenizerAdvanceToNextToken & CFStringTokenizerGetCurrentTokenRange.
One interesting "fact" is how CFStringTokenizer tokenizes the Chinese words, for example "欢迎使用" will be tokenize into "欢迎" & "使用", which totally makes sense, but if you search "迎", you will be surprised to see no result at all!
In that case you probably need to write a tokenizer like Hai Feng Kao's sqlite tokenizer.
I am relatively new to maxima. I want to know how to write an array into a text file using maxima.
I know it's late in the game for the original post, but I'll leave this here in case someone finds it in a search.
Let A be a Lisp array, Maxima array, matrix, list, or nested list. Then:
write_data (A, "some_file.data");
Let S be an ouput stream (created by openw or opena). Then:
write_data (A, S);
Entering ?? numericalio at the input prompt, or ?? write_ or ?? read_, will show some info about this function and related ones.
I've never used maxima (or even heard of it), but a little Google searching out of curiousity turned up this: http://arachnoid.com/maxima/files_functions.html
From what I can gather, you should be able to do something like this:
stringout("my_new_file.txt",values);
It says the second parameter to the stringout function can be one or more of these:
input: all user entries since the beginning of the session.
values: all user variable and array assignments.
functions: all user-defined functions (including functions defined within any loaded packages).
all: all of the above. Such a list is normally useful only for editing and extraction of useful sections.
So by passing values it should save your array assignments to file.
A bit more necroposting, as google leads here, but I haven't found it useful enough. I've needed to export it as following:
-0.8000,-0.8000,-0.2422,-0.242
-0.7942,-0.7942,-0.2387,-0.239
-0.7776,-0.7776,-0.2285,-0.228
-0.7514,-0.7514,-0.2124,-0.212
-0.7168,-0.7168,-0.1912,-0.191
-0.6750,-0.6750,-0.1655,-0.166
-0.6272,-0.6272,-0.1362,-0.136
-0.5746,-0.5746,-0.1039,-0.104
So I've found how to do this with printf:
with_stdout(filename, for i:1 thru length(z_points) do
printf (true,"~,4f,~,4f,~,4f,~,3f~%",bot_points[i],bot_points[i],top_points[i],top_points[i]));
A bit cleaner variation on the #ProdoElmit's answer:
list : [1,2,3,4,5]$
with_stdout("file.txt", apply(print, list))$
/* 1 2 3 4 5 is then what appears in file.txt */
Here the trick with apply is needed as you probably don't want to have square brackets in your output, as is produced by print(list).
For a matrix to be printed out, I would have done the following:
m : matrix([1,2],[3,4])$
with_stdout("file.txt", for row in args(m) do apply(print, row))$
/* 1 2
3 4
is what you then have in file.txt */
Note that in my solution the values are separated with spaces and the format of your values is fixed to that provided by print. Another caveat is that there is a limit on the number of function parameters: for example, for me (GCL 2.6.12) my method does not work if length(list) > 64.