September 2017 Update

Task/String-matching/Jq/string-matching-1.jq

@@ -0,0 +1,3 @@
+# startswith/1 is boolean:
+"abc" | startswith("ab")
+#=> true

Task/String-matching/Jq/string-matching-2.jq

@@ -0,0 +1,6 @@
+# index/1 returns the index or null,
+# so the jq test "if index(_) then ...." can be used
+# without any type conversion.
+
+"abcd" | index( "bc")
+#=> 1

Task/String-matching/Jq/string-matching-3.jq

@@ -0,0 +1,3 @@
+# endswith/1 is also boolean:
+"abc" | endswith("bc")
+#=> true

Task/String-matching/Jq/string-matching-4.jq

@@ -0,0 +1,5 @@
+"abc" | test( "^ab")
+
+"abcd" | test("bc")
+
+"abcd" | test("cd$")

Task/String-matching/Jq/string-matching-5.jq

@@ -0,0 +1,6 @@
+# In jq 1.4 or later:
+jq -n '"abcdabcd" | indices("bc")'
+[
+  1,
+  5
+]

Task/String-matching/Jq/string-matching-6.jq

@@ -0,0 +1,3 @@
+$ jq -n '"abcdabcd" | match("bc"; "g") | .offset'
+1
+5