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My code is
for i in 0..array_dif.count-1
a = array_dif[i] - array_dif[0]
b = array_dif[array_dif.count-1] - array_dif[0]
norm = a.0/b
array_norm[i] = norm
end
And i'm getting the following error:
rb:135: no .<digit> floating literal anymore; put 0 before dot (SyntaxError)
norm = a.0/b
^
C:/piegas/config/initializers/backtrace_silencers.rb:135: syntax error, unexpected tINTEGER, expecting '('
norm = a.0/b
^
I don't know whats wrong with it
norm = a.0/b is an invalid statement (aka SyntaxError).
What do you want that statement to do?
norm = a/b might make sense.
norm = array_dif[0]/b might also make sense.
But without knowing the purpose of the code, it's difficult to know what the correct solution is.
What do you mean by a.0/b? It is invalid. If you were trying to convert a to float then it would be a.to_f/b.
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When I try using fabs on a CGFloat number in Swift 5, I get this warning:
'fabs' is deprecated: renamed to 'abs'
But when I use abs, it's argument is only Integer, not Float or Double. I am using XCode 12 if that matters. How do I resolve this?
You're probably using abs from the Foundation framework.
Try the following:
Swift.abs(CGFloat(1.0))
Foundation.abs(CGFloat(1.0)) // Cannot convert value of type 'CGFloat' to expected argument type 'Int32'
Swift.abs(CGFloat(1.0)) // Compiles successfully
Just use CGFloat.magnitude
CGFloat(-1.23).magnitude // => 1.23
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Hi i am working on a ruby on rails project wih ruby-2.5.0 and rails 5. I have a string which contains the total amount. So i need to find the total amount using regex.
String:-
"TOTAL
EFT
CHANGE
Taxable Ite.s
TOTAL includes GST
OTHER SAVINGS
0000000000
$73.26
HAIERF(RDS stm IGA
KARAWARA *AOI
TERMINAL"
Here $73.26 is the total amount. I tried /$(\d{1,2}(\.)\d{1,2})/ and /^\d{1,4}(\.\d{0,2})?$/ But its not working. Please help me with exact regex. Thanks in advance.
Updated As per the op's comment:
/TOTAL(?=((?!TOTAL).)*).*?(\$\d{1,4}(?:\.\d{1,2})?)/im
This is a compilation of both of your regex.
Regex Demo
Sample Source ( Run Here )
re = /TOTAL(?=((?!TOTAL).)*).*?(\$\d{1,4}(?:\.\d{1,2})?)/im
str = 'TOTAL $234
EFT
CHANGE
Taxable Ite.s
TOTAL includes GST
OTHER SAVINGS
0000000000
$73.26
HAIERF(RDS stm IGA
KARAWARA *AOI
TERMINAL
$83.26
Total
asdasfd
sadfasdf
$1235
'
str.scan(re) do |match|
puts match[1]
end
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I am having a strange issue with the Neo4JClient.
The following query works
.AndWhere("((shipper.Name =~ '(?i).*" + filterTxt + ".*') OR (frm.Name =~ '(?i).*" + filterTxt + ".*') OR (to.Name =~ '(?i).*" + filterTxt + ".*'))");
but the same when I convert to the parameterized query like below:
.AndWhere("((shipper.Name =~ {searchParam}) OR (frm.Name =~ {searchParam}) OR (to.Name =~ {searchParam}))")
.WithParam("searchParam", "(?i).*" + filterTxt + ".*");
it fails to execute from within the Neo4JClient I get an exception saying connection is closed, however when I pickup the DebugQueryText generated by the Neo4JClient, and execute it on the neo4j console, it returns result.
is there something I am doing wrong with the way I am using this wildcard search?
Regrads
Kiran
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Closed 9 years ago.
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I have following strings:
1) Beach Cottage (CP)
2) Beach Cottage (AP)
3) Cotta (GAP)
And I want to get substing between ( ) that is from first CP
Try this for example:
str = "Beach Cottage (CP)"
str.match(/(\((.*)\))/)[2]
you can use scan also with regx:
str = "Beach Cottage (CP)"
needed_sub_str = str.scan(/\((.*)\)/)
puts "expected sub string :: #{needed_sub_str}"
Output ::
expected sub string :: CP
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Closed 9 years ago.
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Can someone point me to a good primer just explaining the different syntactic features in Ruby/Rails? For instance, how come some examples I see do myMethod(x: "z") and others do myMethod(:x => "x")?
The syntax in general seems strange to me, just looking for a quick at-a-glance reference to use as a cheat sheet.
They are the same, it is just a matter of preferences.
I also asked myself why would we add this new syntax if we already have one? Well, Programming with Ruby implies that we are lazy and want to type the less possible caracters. So this new syntax allow us - lazy programmers - to write the same thing, minus 1 caracter!
But keep in mind some stuff, like the type of the keys for instance (Ruby 1.9.3):
> {a: 12}.class
=> Hash
> {:a => 12}.class
=> Hash
> {'a' => 12}.keys.first.class
=> String
> {a: 12}.keys.first.class
=> Symbol
Also, some declaration are illegal with the new syntax:
> { '1-2' => "something" }
=> {"1-2"=>"something"}
> { 1-2: "something" }
SyntaxError: (irb):38: syntax error, unexpected ':', expecting tASSOC
{ 1-2: "something" }
^
(irb):38: syntax error, unexpected '}', expecting $end
For more informations: Is there any difference between the `:key => "value"` and `key: "value"` hash notations?