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linux_shell/build_script/base/cacl.bash

@@ -0,0 +1,47 @@
+#!/bin/bash
+# shellcheck disable=SC2155
+if ! type "include" > /dev/null 2>&1; then
+  include() {
+  . "$(cd "$(dirname "$1")" && pwd)/${2}";
+  };
+fi
+include "${BASH_SOURCE[0]}" ../pragma_once.bash
+if ! pragma_once ${BASH_SOURCE[0]}; then return 0; fi
+include "${BASH_SOURCE[0]}" ./global_rely/export.bash
+# shellcheck source=./global_rely/export.bash
+
+
+
+
+square() {
+  echo $(($1 * $1))
+}
+
+cube() {
+  echo $(($1 * $1 * $1))
+}
+
+add() {
+  echo $(($1 + $2))
+}
+
+map() {
+  local fn=$1
+  while read value; do
+    $fn $value
+  done
+}
+
+reduce() {
+  local fn=$1
+  local result=${2:-0} # 初始值
+  while read value; do
+    result=$($fn $result $value)
+  done
+  echo $result
+}
+
+#seq 1 10 | map square | reduce add # 平方和：385
+#seq 1 10 | map cube | reduce add   # 立方和：3025
+
+return 0