Kernighans large earthquake problem: Difference between revisions

</pre>

=={{header|jq}}==

{{works with|jq}}

'''Works with gojq, the Go implementation of jq'''

To meet the task requirements in a minimal way, one could invoke

jq as follows:

<pre>

jq -Rrn 'inputs | . as $line | [splits(" *") ] | select((.[2]|tonumber) > 6) | $line' data.txt

</pre>

The program shown in the following subsection, by contrast, determines the file name dynamically and includes

some error-checking. The output shown below is based on the invocation:

<pre>

jq -Rrn -f large-earthquake-problem.jq data.txt

</pre>

where data.txt is as for [[#Snobol|Snobol]].

<lang jq>input as $one

| "The earthquakes from \(input_filename) with a magnitude greater than 6 are:\n",

( $one, inputs

| . as $line

| [splits(" *")]

| if length < 3

then "WARNING: invalid line:\n\($line)"

else try ((.[2] | tonumber) as $mag

| select($mag > 6)

| $line) catch "WARNING: column 3 is not a recognized number in the line:\n\($line)"

end )

</lang>

{{out}}

<pre>

The earthquakes from data.txt with a magnitude greater than 6 are:

8/27/1883 Krakatoa 8.8

5/18/1980 MountStHelens 7.6

1/25/4567 EdgeCase3 6.1