I want to use a En-dash with ASCII value –. I am using haml and did the coding as
do this
= "–".html_safe
task
so as to appear as "do this -- task". In the place of double dash I need an EN-dash. The above code is working fine in my local machine. when I am sending a mail with the above text to the recipent, he is seeing it as do this – task.
Can anyone help me in how to make it appear as the En-dash in the mail?
ASCII character codes utilize concluding semicolons (;) to delimit characters for interpolation. Add a concluding semicolon to your en-dash ASCII code:
= "–".html_safe
Related
Im using a BG96 modem to connect to AWS iot over MQTT.
I'm trying to set my MQTT Last Will and Testament with the following AT-command:
+QMTCFG:"will",(0-5),(0,1),(0-2),(0,1),"willtopic","willmessage"
Which works great.
But now I'm trying to add a JSON formatted string to "willmessage", so I need to add "" (double quotes) in there, which means I need to escape them in my command. But I have no clue if I can escape them or what the escape character is.
Things I tried: \" (backslash) and "" (double double quotes)
I looked in all of the BG96 datasheets, and I don't see it mentioned anywhere.
I had the same issue while using MQTT commands on a SIMCOM SIM800c, and I noticed that the regular backslash (\) escapes the quotation marks (as it does in c) when communicating directly with the GSM unit via a USB to TTL converter. To implement this in software I printed the following string to the UART connected to the GSM Modem:
AT+SMPUB=\"testTopicPost\",0,1,\"{\x5c\x22Key\x5c\x22 : \x5c\x22Value\x5c\x22}\"
What this basically does is send the raw \ and " characters to the GSM unit. Hope this solution works for you as well.
Escaping of " within a string is covered in chapter 5.4.2.2 String constants in the V.250 standard - which is a MUST READ for anyone writing code handling AT commands (read at least all of chapter 5):
String constants shall consist of a sequence of ... except for the characters """ ... . String constants shall be bounded at the beginning and end by the double-quote character (""" ... . ... The double-quote character, used as the beginning and ending string delimiter, shall be represented within a string constant as "\22".
So the escape mechanism is \22 not \x22. This should be universally the case for all modems and not something that is implementation dependent.
I did not find reference to documentation of MQTT and BG96 and you did not link any of your "all of the BG96 datasheets" so I am just providing example syntax for an imaginary command to send a JSON payload of {"key": "value"}:
AT+SOMECOMMAND=...,"{\22key\22: \22value\22}"
Some special characters have different values between the ASCII character set and the GSM character set.
i.e.
In the ASCII character set: \ = 0x5C.
In the GSM character set: Ö = 0x5C.
Beyond this point, some special characters must be entered using a specific way, such as a 2-byte representation. I suggest you check the standard/version of AT commands implemented on your hardware (i.e. GSM 07.07, GSM 07.05, manufacturer specific set...).
i.e. I'm using a GPS+GPRS modem from Ai-Thinker called A9G. In this one, to use the AT+MQTTPUB command with data formatted in JSON style, I need to append \x5c\x32\x32. So the module will interpret this as \22 and the server as \".
i.g.
"{\x5c\x32\x32Key\x5c\x32\x32:\x5c\x32\x32Value\x5c\x32\x32}"
at the cloud it will be:
{"Key":"Value"}
Hi I've been struggling with this for the last hour and am no closer. How exactly do I strip everything except numbers, commas and decimal points from a rails string? The closest I have so far is:-
rate = rate.gsub!(/[^0-9]/i, '')
This strips everything but the numbers. When I try add commas to the expression, everything is getting stripped. I got the aboves from somewhere else and as far as I can gather:
^ = not
Everything to the left of the comma gets replaced by what's in the '' on the right
No idea what the /i does
I'm very new to gsub. Does anyone know of a good tutorial on building expressions?
Thanks
Try:
rate = rate.gsub(/[^0-9,\.]/, '')
Basically, you know the ^ means not when inside the character class brackets [] which you are using, and then you can just add the comma to the list. The decimal needs to be escaped with a backslash because in regular expressions they are a special character that means "match anything".
Also, be aware of whether you are using gsub or gsub!
gsub! has the bang, so it edits the instance of the string you're passing in, rather than returning another one.
So if using gsub! it would be:
rate.gsub!(/[^0-9,\.]/, '')
And rate would be altered.
If you do not want to alter the original variable, then you can use the version without the bang (and assign it to a different var):
cleaned_rate = rate.gsub!(/[^0-9,\.]/, '')
I'd just google for tutorials. I haven't used one. Regexes are a LOT of time and trial and error (and table-flipping).
This is a cool tool to use with a mini cheat-sheet on it for ruby that allows you to quickly edit and test your expression:
http://rubular.com/
You can just add the comma and period in the square-bracketed expression:
rate.gsub(/[^0-9,.]/, '')
You don't need the i for case-insensitivity for numbers and symbols.
There's lots of info on regular expressions, regex, etc. Maybe search for those instead of gsub.
You can use this:
rate = rate.gsub!(/[^0-9\.\,]/g,'')
Also check this out to learn more about regular expressions:
http://www.regexr.com/
I have a requirement to escape a string with url information but also some special characters such as '<'.
Using cl_http_utility=>escape_url this translates to '%3c'. However due to our backend webserver, it is unable to recognize this as special character and takes the value literally. What it does recognize as special character is '%3C' (C is upper case). Also if one checks http://www.w3schools.com/tags/ref_urlencode.asp it shows the value with all caps as the proper encoding.
I guess my question is is there an alternative to cl_http_utility=>escape_url that does essentially the same thing except outputs the value in upper case?
Thanks.
Use the string function.
l_escaped = escape( val = l_unescaped
format = cl_abap_format=>e_url ).
Other possible formats are e_url_full, e_uri, e_uri_full, and a bunch of xml/json stuff too. The string function escape is documented pretty well, demo programs and all.
text.scan(/\"[\d\w\s\+\-\*\/]*\"/)
I'm simply looking to find any thing within quotations that can contain letters, numbers, spaces, plus, minus, star, or forward slash. Everything works great in console. Each of the following works in a browser:
"abc"
"123"
"x-1" or "x - 1"
"x/1" or "x / 1"
But the plus sign and star fail in a browser (despite working fine in console with the same regex). Does anyone have any ideas?
Edit #1: I'm performing a quick gsub to add some formatting to the results of the scan. If the quotations have a plus or star in them, they don't even get picked up by the scan. The same code and text pasted in console works just fine.
Edit #2: I figured out a better way to frame this question without extraneous details and got the answer. "Why can't I perform a gsub on each of the results from a scan if the result contains regex special characters?"
Turned out that this problem was related to regexp string insertion (/#{whatever}/) not escaping special characters - manually escaping clears it up (/#{Regexp.escape(whatever)}/). See this question for a full example/explanation.
I don't know what do you mean "work in browser" but I'm making an assumption that you're trying to parse an URL. In URL the + & * signs can be converted to %2B & %2A respectively.
Try this regexp:
/"[(\d\w\s\+\-\*\/|%2B|%2A)]+"/
...or decode URL before parsing.
I've seen this posted a couple of times but none of the solutions seem to work for me so far...
I'm trying to remove a spurious  character from a string...
e.g.
"myÂstring here Â$100"
..but it should be my string here $100
I've tried:
string.gsub(/\194/,'')
string.gsub(194.chr,'')
string.delete 194.chr
All of these still leave the  intact..
Any thoughts?
By default, Rails supports UTF-8.
You can use your favorite editor to write a gsub call using the proper character you want to replace, as in:
"myÂstring here Â$100".gsub(/Â/,"")
If this does not work as well, you might be having an encoding error somewhere on your stack, probably on your HTML document. Try running rails console, extract somehow that string (if it comes from the Model, try to perform a find on the containing class) and run the gsub. It won't solve your problem, but you'll get a clue to where exactly the problem may lie.
Looks like a character encoding problem to me. For every Unicode code point in the range U+0080..U+00BF inclusive, the UTF-8 encoding is a two-byte sequence, 0xC2 (194 decimal) and the numeric value the code point. For example, a non-breaking space--U+00A0--becomes 0xC2 0xA0. Was there another extra character in there, that you already removed?
At any rate, gsub(/\194/,'') is wrong. \nnn is supposed to be an octal escape, but the number is in its decimal form. 194 in octal is \302.
"myÂstring here Â$100".gsub("Â","") # "mystring here $100"
Is that what you meant?