split the string to get specific value on ruby on rails? - ruby-on-rails

I want to get two separate value from
/en/faq
the two separate value will be
lang =en
rem =faq
I have used to split which was relatively much easier. Nonetheless, this is my approach which needs tweaking around, hopefully from your help I will be able to accomplish it.
string = "/en/faq"
lang = string.split("/").first
rem = string.split("/en/")
puts "/#{lang}/#{rem[1]}"
The desired output should be "/en/faq/" but the output is
"//faq"
i know i have got '.first' which is why I am getting a null value but could anyone help on getting the right results please?
thanks in advance.

string = "/en/faq"
lang = string.split("/")
rem = string.split("/#{lang[1]}/")
puts "/#{lang[1]}/#{rem[1]}"
this does the trick and thanks to Sebi for his prompt answer!

Related

lua sub string replace 2 pattern

due to using nginx lua (kong gateway)
would like to replace
from
{"body":"\r\n \"username\": \"sampleUser\",\r\n \"password\": \"samplePassword\",\r\n"}
to
{"body":"\r\n \"username\": \"sampleUser\",\r\n \"password\": \"***REDACTED***\",\r\n"}
from
username=sampleUser&password=samplePassword
to
username=sampleUser&password=***REDACTED***
from
"password" : "krghfkghkfghf"
to
"password" : "***REDACTED***"
i did try on sample https://stackoverflow.com/a/16638937/712063
local function replacePass(configstr, newpass)
return configstr:gsub("(%[\"password\"%]%s*=%s*)%b\"\"", "%1\"" .. newpass .. "\"")
end
it does not work, any recommended reference ?
maybe something like this:
local t = {
[[{"body":"\r\n \"username\": \"sampleUser\",\r\n \"password\": \"samplePassword\",\r\n"} ]],
[[username=sampleUser&password=samplePassword]],
[["password" : "krghfkghkfghf"]]
}
local newpass ="***REDACTED***"
for k,example in pairs(t) do
res = example:gsub('(password[\\" :]+)(.-)([\\"]+)',"%1"..newpass.."%3")
res = res:gsub("(password=).+","%1"..newpass)
print(res)
end
out:
{"body":"\r\n \"username\": \"sampleUser\",\r\n \"password\": \"***REDACTED***\",\r\n"}
username=sampleUser&password=***REDACTED***
"password" : "***REDACTED***"
There's several things wrong with that at first sight.
1. You only check for =
In your test data you seem to have cases with key = value as well as key : value but your pattern only checks for =; replace that with [=:] for a simple fix.
2. You can't balance quotation marks
I don't know how you expect this to work, but [[%b""]] just finds the shortest possible string between two " characters, just as [[".-"]] would. If that's your intention, then there's nothing wrong with writing it using %b though.
3. Just don't
As I don't know the context, I can't say if this really is a bad idea or not, but it does seem like a very brittle solution. If this is an option, I would recommend considering the alternative and going with something more robust.
As for what a better alternative could look like, I can't say without knowledge of your requirements. Maybe normalizing the data into a Lua table and replacing the password key in a uniform way? This would make sure that the data is either sanitized, or errors during parsing.
Beyond that, it would help if you told us how it doesn't work. It's easy to miss bugs when reading someone elses code, but knowing how the code misbehaves can help a lot with actually spotting the problem.
EDIT:
4. You didn't even remove the brackets
You didn't even remove the [] from that other stack overflow answer. Obviously that doesn't work without any modifications.

0 Checking if TextBox.Text contains the string in the table. But it doesn't work? Lua

I am making a script inside TextButton script that will check if the TextBox contains any of the word or string inside the table.
text = script.Parent.Parent:WaitForChild('TextBox')
label = script.Parent.Parent:WaitForChild('TextLabel')
a = {'test1','test2','test3'}
script.Parent.MouseButton1Click:connect(function()
if string.match(text.Text, a) then
label.Text = "The word "..text.Text.." was found in the table."
else
label.Text = "The word "..text.Text.." was not found in the table."
end
end)
But it gives an error string expected, got table. from line 7 which is refering to the line if string.match....
Is there any way to get all text in the table?
What's the right way to do it?
Oh boy, there's a lot to say about this.
The error message
Yes.
No, seriously, the answer is yes. The error message is exactly right. a is a table value; you can clearly see that on the third line of code. string.match needs a string as its second argument, so it obviously crashes.
Simple solution
use a for loop and check for each string in a separately.
found = false
for index, entry in ipairs(a) do
if entry == text.Text then
found = true
end
end
if found then
... -- the rest of your code
The better* solution
In Lua, if we want to know if a single element is in a set, we usually take advantage of the fact that tables are implemented as hashmaps, meaning they are very fast when looking up keys.
For that to work, one first needs to change the way the table looks:
a = {["test1"] = true, ["test2"] = true, ["test3"] = true}
Then we can just index a with a string to find out if it is contained int eh set.
if a[text.Text] then ...
* In practice this is just as good as the first solution as long as you only have a few elements in your table. It only becomes relevant when you have a few hundred entries or your code needs to run absolutely as fast as possible.

php str_replace produces strange results

I am trying to replace some characters in a text block. All of the replacements are working except the one at the beginning of the string variable.
The text block contains:
[FIRST_NAME] [LAST_NAME], This message is to inform you that...
The variables are defined as:
$fname = "John";
$lname = "Doe";
$messagebody = str_replace('[FIRST_NAME]',$fname,$messagebody);
$messagebody = str_replace('[LAST_NAME]',$lname,$messagebody);
The result I get is:
[FIRST_NAME] Doe, This message is to inform you that...
Regardless of which tag I put first or how the syntax is {TAG} $$TAG or [TAG], the first one never gets replaced.
Can anyone tell me why and how to fix this?
Thanks
Until someone can provide me with an explanation for why this is happening, the workaround is to put a string in front and then remove it afterward:
$messagebody = 'START:'.$messagebody;
do what you need to do
$messagebody = substr($messagebody,6);
I believe it must have something to do with the fact that a string starts at position 0 and that maybe the str_replace function starts to look at position 1.

Ruby - ERROR_Can't convert nil into an exact number

I try to make that, in the controller ...
raw_counter_reset_date = REDIS.hget(params[:id], 'overquota_reset_at')
#counter_reset_date = Time.at(raw_counter_reset_date)
But when I want lauch application, I have this error :
can't convert nil into an exact number
I know that #counter_reset_date = Time.at(1364046539) works with numbers, but I would that the application take the timestamp date in a database and convert in date on my web-page.
I hope to have been understandable, and thank you in advance for your help.
this is because raw_counter_reset_date is nil. convert it to a number (raw_counter_reset_date.to_i) or check for nil.

How to make text roll over into another textbox? Visual Basic

So, I want to make it so that, when the user pastes something into a textbox, once it pastes the first 24 characters into that textbox, it will send the rest to a richtextbox.
I've tried splitting, joining, with no luck. I don't know what else I can do. Any ideas?
I've tried:
If TextBox1.Text > TextBox1.MaxLength Then
RichTextBox4.Text = TextBox1.Text
End If
And some other weird things that didn't work out. I would appreciate some help.
Thank you.
use Substring....
Dim input = textbox1.text
Dim substring As String = input .Substring(0, 24)
richtextbox4.text = substring
http://www.dotnetperls.com/substring-vbnet

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