(欢迎您将标题更改为更合适的标题!)
我收到了另一个Ruby / ERB问题。我有这个文件:
ec2-23-22-59-32, mongoc, i-b8b44, instnum=1, Running
ec2-54-27-11-46, mongod, i-43f9f, instnum=2, Running
ec2-78-62-192-20, mongod, i-02fa4, instnum=3, Running
ec2-24-47-51-23, mongos, i-546c4, instnum=4, Running
ec2-72-95-64-22, mongos, i-5d634, instnum=5, Running
ec2-27-22-219-75, mongoc, i-02fa6, instnum=6, Running
我可以处理文件来创建一个这样的数组:
irb(main):007:0> open(inFile).each { |ln| puts ln.split(',').map(&:strip)[0..1] }
ec2-23-22-59-32
mongoc
ec2-54-27-11-46
mongod
....
....
但我真正想要的是出现次数连接到“mongo-type”以便它变为:
ec2-23-22-59-32
mongoc1
ec2-54-27-11-46
mongod1
ec2-78-62-192-20
mongod2
ec2-24-47-51-23
mongos1
ec2-72-95-64-22
mongos2
ec2-27-22-219-75
mongoc2
每个mongo类型的数量不固定,并且随时间变化。任何帮助我怎么能这样做?提前致谢。干杯!!
答案 0 :(得分:1)
快速回答(也许可以优化):
data = 'ec2-23-22-59-32, mongoc, i-b8b44, instnum=1, Running
ec2-54-27-11-46, mongod, i-43f9f, instnum=2, Running
ec2-78-62-192-20, mongod, i-02fa4, instnum=3, Running
ec2-24-47-51-23, mongos, i-546c4, instnum=4, Running
ec2-72-95-64-22, mongos, i-5d634, instnum=5, Running
ec2-27-22-219-75, mongoc, i-02fa6, instnum=6, Running'
# a hash where we will save mongo types strings as keys
# and number of occurence as values
mtypes = {}
data.lines.each do |ln|
# get first and second element of given string to inst and mtype respectively
inst, mtype = ln.split(',').map(&:strip)[0..1]
# check if mtypes hash has a key that equ current mtype
# if yes -> add 1 to current number of occurence
# if not -> create new key and assign 1 as a value to it
# this is a if ? true : false -- ternary operator
mtypes[mtype] = mtypes.has_key?(mtype) ? mtypes[mtype] + 1 : 1
# combine an output string (everything in #{ } is a variables
# so #{mtype}#{mtypes[mtype]} means take current value of mtype and
# place after it current number of occurence stored into mtypes hash
p "#{inst} : #{mtype}#{mtypes[mtype]}"
end
输出:
# "ec2-23-22-59-32 : mongoc1"
# "ec2-54-27-11-46 : mongod1"
# "ec2-78-62-192-20 : mongod2"
# "ec2-24-47-51-23 : mongos1"
# "ec2-72-95-64-22 : mongos2"
# "ec2-27-22-219-75 : mongoc2"
我认为非常直截了当。如果您不明白 - 请告诉我。