feat(unitproc/bktemp-randFloat):random float string generator

diff --git a/unitproc/bktemp-randFloat b/unitproc/bktemp-randFloat
new file mode 100644 (file)
index 0000000..138653f
--- /dev/null
+++ b/unitproc/bktemp-randFloat
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+#==BEGIN Function Definitions==
+randFloat() {
+    # Desc: Output random float with no newline
+    # Usage: randFloat arg1
+    # Inputs: arg1: number of decimal places
+    # Output: stdout: float as decimal string
+    # Version: 0.0.1
+    # Note: Outputs float from 0.000... to 0.999...
+    # Note: Default number of decimals is 5.
+    # Ref/Attrib: Integer test regular expression https://stackoverflow.com/a/806923
+
+    # Validate input
+    if [[ $# -eq 0 ]]; then
+       : # do nothing
+    elif [[ $# -eq 1 ]]; then
+       arg1=$1;
+       RETEST1='^[0-9]+$'
+       if ! [[ $arg1 =~ $RETEST1 ]]; then
+           echo "ERROR:Not an integer." >&2; exit 1;
+       fi;
+    else
+       echo "ERROR:Invalid number of arguments:${@}";
+    fi;
+
+    # Produce output
+    decimals="$(head -c ${arg1:-5} < <(LC_ALL=C tr -cd "[:digit:]" < <(cat /dev/urandom)))";
+    echo 0."$decimals";
+}
+#==END Function Definitions==
+
+#==BEGIN sample code==
+dec=70
+time randFloat;
+time (randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat);
+time (randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec");
+time (randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null);
+#==END sample code==