Question

Considering this string:

Looking for a front-end developer who can fix a bug on my Wordpress site. The header logo disappeared after I updated some plugins.  \n\nI have tried disabling all plugins but it didn't help.Budget: $25\nPosted On: May 06, 2016 16:29 UTCCategory: Web, Mobile &amp; Software Dev &gt; Web DevelopmentSkills:        WordPress            Country: Denmarkclick to apply

I'd like to retrieve the price value after the string Budget:. I have a number of string all with the same pattern (price right after the "Budget:" string)

I tried /\$[\d.]+/ to extract any price amount but that would take any price amount in the string not only the one following Budget:

How can I accomplish that ?

Answer 1

EraseView

这实际上并不完全正确，因为

r = /
    \b          # match a word break
    [Bb]        # match "B" or "b"
    udget:      # match string
    \s+\$       # match one or more spaces followed by a dollar sign
    \K          # discard all matches so far
    \d{1,3}     # match between one or three digits
    (?:\,\d{3}) # match a comma followed by three digits in a non-capture group
    *           # perform the preceding match zero or more times
    (?:\.\d\d)  # match a period followed by two digits in a non-capture group
    ?           # make the preceding match optional
    /x          # free-spacing regex definition mode

"Some text Budget: $25\nsome more text"[r]            #=> "25"
"Some text Budget: $25.42\nsome more text"[r]         #=> "25.24"
"Some text Budget: $25,642,328\nsome more text"[r]    #=> "25,642,328"
"Some text Budget: $25,642,328.01\nsome more text"[r] #=> "25,642,328.01"

应该返回"Some text Budget: $25,64,328.01\nsome more text"[r] #=> "25"。不幸的是，修复需要进行大手术：

nil

Answer 2

试试这个：

def extract_budget s
  m = s.match(/Budget: \$([\d,.]+)\n/)
  if m.nil?
    nil
  else
    m.captures[0].gsub(/,/, "").to_f
  end
end

如果s1是您的字符串，而s2是相同的字符串，但是＆＃34;预算：$ 25,000.53＆＃34;：

irb> extract_budget s1
=> 25.0
irb> extract_budget s2
=> 25000.53
irb> extract_budget "foo"
=> nil

Answer 3

你说字符串＆＃34;预算：＆＃34;不会改变并假设没有小数值，我会使用这样的东西：

/Budget:(\s*\$\d*)/

match a price amount after a particular substring

3 个答案: