Find key that contains certain characters in a hashtable with Ruby -

-

i have hash that's this:

hash = { "key1-one" => 3, "key1-two" => 6, "key2-one" => 5, "key2-two" => 9 }

now want find values keys starting key1, regardless of follows. i've tried has_key? doesn't seem work. know can use regex there built-in method ruby?

hash.select{ |key, _| key.start_with?("key1") }.values

Comments

Post a Comment

Popular posts from this blog

android - Why am I getting the message 'Youractivity.java is not an activity subclass or alias' -

-
Image
i created own android project , cut , pasted code exercise: http://androidexample.com/show_phone_contacts_in_autocomplete_suggestions_-_android_example%20/index.php?view=article_discription&aid=106&aaid=128# when build project no errors or warnings. when run project window error: annoyingly, can't make window smaller, can't click of buttons. cick 'x' @ top, close it. here's project structure: where getting 'autocompletemain' from? (note small c) class named autocompletemain. help. and have activity included in android manifest, in case you're wondering: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.androidexample.autocompleteedittext" android:versioncode="1" android:versionname="1.0" > <uses-permission android:name="android.permission.read_phone_state...
Read more

java - Log4j2 configuration not found when running standalone application builded by shade plugin -

-
i have application when run maven log4j2 working: mvn exec:java -dexec.args=... but when run jar standalone application shows error: java -jar log: error statuslogger unrecognized format specifier [d] error statuslogger unrecognized conversion specifier [d] starting @ position 16 in conversion pattern. error statuslogger unrecognized format specifier [thread] error statuslogger unrecognized conversion specifier [thread] starting @ position 25 in conversion pattern. error statuslogger unrecognized format specifier [level] error statuslogger unrecognized conversion specifier [level] starting @ position 35 in conversion pattern. error statuslogger unrecognized format specifier [logger] error statuslogger unrecognized conversion specifier [logger] starting @ position 47 in conversion pattern. error statuslogger unrecognized format specifier [msg] error statuslogger unrecognized conversion specifier [msg] starting @ position 54 in conversion pattern. error statuslogger unreco...
Read more

python - How do I create a list index that loops through integers in another list -

-
i have list: sentences = ['the number of adults read @ least 1 novel within past 12 months fell 47%.', 'fiction reading rose 2002 2008.', 'the decline in fiction reading last year occurred among men.', 'women read more fiction.', '50% more.', 'though decreased 10% on last decade.', 'men more read nonfiction.', 'young adults more read fiction.', 'just 54% of americans cracked open book of kind last year.', 'but novels have suffered more nonfiction.'] and have list containing indexes of sequences of sentences in above list contain number. index_groupings = [[0, 1], [4, 5], [8]] i want extract specified sentence sequences in variable "sentences" using indexes in variable "index_groupings" following output: the number of adults read @ least 1 novel within past 12 months fell 47%.fiction reading rose 2002 2008. 50% more.though decreased 10% on last decade. just 54% of a...
Read more