I have been able to code solidity and have a single line text field for user inputs. Is it possible to include multi-line text field in solidity? I'd want the user to input a paragraph of information. Maybe more than just a paragraph.
You can store UTF-8 encoded data in string variables, so you should be able to include multiline text as well, as that's just like any other text but with line breaks in it:
Note
All identifiers (contract names, function names and variable names) are restricted to the ASCII character set. It is possible to store UTF-8 encoded data in string variables.
Related
In the below example, how can I set the skip leading row option?
bq --location=US query --external_table_definition=sales::Region:STRING,Quarter:STRING,Total_sales:INTEGER#CSV=gs://mybucket/sales.csv 'SELECT Region,Total_sales FROM sales;'
Regards,
Sreekanth
Flags options can be found under the installation home folder (I marked in bold below the flag you are looking for)
/google-cloud-sdk/platform/bq/bq.py:
--[no]allow_jagged_rows: Whether to allow missing trailing optional columns in
CSV import data.
--[no]allow_quoted_newlines: Whether to allow quoted newlines in CSV import
data.
-E,--encoding: : The character encoding used by the input
file. Options include:
ISO-8859-1 (also known as Latin-1)
UTF-8
-F,--field_delimiter: The character that indicates the boundary between
columns in the input file. "\t" and "tab" are accepted names for tab.
--[no]ignore_unknown_values: Whether to allow and ignore extra, unrecognized
values in CSV or JSON import data.
--max_bad_records: Maximum number of bad records allowed before the entire job
fails.
(default: '0')
(an integer)
--quote: Quote character to use to enclose records. Default is ". To indicate
no quote character at all, use an empty string.
--[no]replace: If true erase existing contents before loading new data.
(default: 'false')
--schema: Either a filename or a comma-separated list of fields in the form
name[:type].
--skip_leading_rows: The number of rows at the beginning of the source file to
skip.
(an integer)
--source_format: : Format of
source data. Options include:
CSV
NEWLINE_DELIMITED_JSON
DATASTORE_BACKUP
Kind of a strange question, but I'm doing some testing to handle errors when a dicom file's tags can't be read.
Unfortunately I don't have a damaged dicom available.
Specifically, can anyone advise how to apply some sort of incorrectly encoded text tag or some invalid numeric data tag onto the file, such that it can't be read by python's pydicom package?
you could have a look at the dcmodify tool from the DCMTK. It can be used to insert, modify and delete attributes. I doubt that it is possible to specify invalid attribute values through the command line, but you could surely modify the source code to accomplish that (except you can definitely write attribute values that exceed the maximum length according to the Value Representation).
My approach would be to create a buffer of characters and write binary data to it. Then pass it to the method that writes the value to the attribute.
Examples:
write unicode (UTF-8) sequences which are not a valid unicode character
write ascii characters which are not covered by the characterset specified by (0008,0005) - not sure whether pydicom would run into problems but it would be wrong from the DICOM perspective
write non-numeric characters to attributes with Value Representation "Decimal String" or "Integer String".
formats other than YYYYMMDD for VR "Date"
formats other than HHMMSS.FFFFFF for VR "Time"
other characters than ['0'-'9'], '.' for VR "Unique Identifier"
[edit]: DCMTK, dcmodify: http://dicom.offis.de/dcmtk.php.en
I am currently trying to estimate the number of times each character is used in a large sample of traditional Chinese characters. I am interested in characters not words. The file also includes punctuation and western characters.
I am reading in an example file of traditional Chinese characters. The file contains a large sample of traditional Chinese characters. Here is a small subset:
首映鼓掌10分鐘 評語指不及《花樣年華》
該片在柏林首映，完場後獲全場鼓掌10分鐘。王家衛特別為該片剪輯「柏林版本
增減20處 趙本山香港戲分被刪
在柏林影展放映的《一代宗師》版本
教李小龍武功 葉問決戰散打王
另一增加的戲分是開場時葉問（梁朝偉飾）
My strategy is to read each line, split each line into a list, and go through and check each character to see if it already exists in a list or a dictionary of characters. If the character does not yet exist in my list or dictionary I will add it to that list, if it does exist in my list or dictionary, I will increase the counter for that specific character. I will probably use two lists, a list of characters, and a parallel list containing the counts. This will be more processing, but should also be much easier to code.
I have not gotten anywhere near this point yet.
I am able to read in the example file successfully. Then I am able to make a list for each line of my file. I am able to print out those individual lines into my output file and sort of reconstitute the original file, and the traditional Chinese comes out intact.
However, I run into trouble when I try to make a list of each character on a particular line.
I've read through the following article. I understood many of the comments, but unfortunately, was unable to understand enough of it to solve my problem.
How to do a Python split() on languages (like Chinese) that don't use whitespace as word separator?
My code looks like the following
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import codecs
wordfile = open('Chinese_example.txt', 'r')
output = open('Chinese_output_python.txt', 'w')
LINES = wordfile.readlines()
Through various tests I am sure the following line is not splitting the string LINES[0] into its component Chinese characters.
A_LINE = list(LINES[0])
output.write(A_LINE[0])
I mean you want to use this, from answerer 'flow' at How to do a Python split() on languages (like Chinese) that don't use whitespace as word separator? :
from re import compile as _Re
_unicode_chr_splitter = _Re( '(?s)((?:[\ud800-\udbff][\udc00-\udfff])|.)' ).split
def split_unicode_chrs( text ):
return [ chr for chr in _unicode_chr_splitter( text ) if chr ]
to successfully split a line of traditional Chinese characters.. I just had to know the proper syntax to handle encoded characters.. pretty basic.
my_new_list = list(unicode(LINE[0].decode('utf8')));
I have a Sql statament using special character (ex: ('), (/), (&)) and I don't know how to write them in my VB.NET code. Please help me. Thanks.
Find out the Unicode code point for the character (from http://www.unicode.org) and then use ChrW to convert from the code point to the character. (To put this in another string, use concatenation. I'm somewhat surprised that VB doesn't have an escape sequence, but there we go.)
For example, for the Euro sign (U+20AC) you'd write:
Dim euro as Char = ChrW(&H20AC)
The advantage of this over putting the character directly into source code is that your source code stays "just pure ASCII" - which means you won't have any strange issues with any other program trying to read it, diff it, etc. The disadvantage is that it's harder to see the symbol in the code, of course.
The most common way seems to be to append a character of the form Chr(34)... 34 represents a double quote character. The character codes can be found from the windows program "charmap"... just windows/Run... and type charmap
If you are passing strings to be processed as SQL statement try doubling the characters for example.
"SELECT * FROM MyRecords WHERE MyRecords.MyKeyField = ""With a "" Quote"" "
The '' double works with the other special characters as well.
The ' character can be doubled up to allow it into a string e.g
lSQLSTatement = "Select * from temp where name = 'fred''s'"
Will search for all records where name = fred's
Three points:
1) The example characters you've given are not special characters. They're directly available on your keyboard. Just press the corresponding key.
2) To type characters that don't have a corresponding key on the keyboard, use this:
Alt + (the ASCII code number of the special character)
For example, to type ¿, press Alt and key in 168, which is the ASCII code for that special character.
You can use this method to type a special character in practically any program not just a VB.Net text editor.
3) What you probably looking for is what is called 'escaping' characters in a string. In your SQL query string, just place a \ before each of those characters. That should do.
Chr() is probably the most popular.
ChrW() can be used if you want to generate unicode characters
The ControlChars class contains some special and 'invisible' characters, plus the quote - for example, ControlChars.Quote
What is the best character to use to delimit user input?
For example if a user has an infinite number of textboxes to type things into, but each textbox's value will be concatenated into a single database field, what is the safest character to delimit each input?
I think it should be a character not on your typical keyboard. Is there a character out there just for this?
You could use one of the ASCII control characters. There's one called "Record Separator" which has a hex value of 0x1E that might fit your needs.
Edit: Incidentally, if you want to do a proper job, you should probably ensure that \x1E is escaped in user input. One way to do this would be to use another ASCII control character: \x1B which is the "escape" control code. Thus, "\x1E" in input becomes "\x1B\x1E" and "\x1B" becomes "\x1B\x1B".
Keep in mind, of course, that because these are non-printing control codes, they can't be displayed. If you want a printable representation, you might want to go with a normal character like the comma and just escape it from input.
I guess one approach is to use a comma, and then to escape commas within the user input. It's probably not safe to assume any character (or even a sequence of characters) can't appear in user input -- if you can enter it in your code, then there's a way the user can enter it into a text box!
Normally commas or semi-colons are used for splitting data. What about | which the average user never uses?
How about a combination of keys? e.g.
|::|
so
this|::|and|::|that. Plus Those:Here and there.|::|Even this|that works
Any markup language will do for this. They're a little verbose but at least they'll be future proofing your field.
use ♥
ftw