new samples added

Author: michaelcplusplus

samples/common/leftpad.js

@@ -0,0 +1,12 @@
+function leftpad (str, len, ch) {
+  str = String(str);
+ 
+  var i = -1;
+  if (!ch && ch !== 0) ch = ' ';
+  len = len - str.length;
+  while (++i < len) {
+    str = ch + str;
+  }
+  return str;
+}
+

samples/common/v8bigint.js

@@ -0,0 +1,21 @@
+//bigint support
+const numberWithCommas = (x) => { 
+  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, "."); 
+}
+
+function main() { 
+  console.log("main");
+  console.log((2n**31n/86400n)/365n);
+  var foo= 2n**40n / (10n*100n*1000n);
+
+  var x = BigInt(Number.MAX_SAFE_INTEGER);
+
+  console.log(numberWithCommas(x));
+
+  console.error(numberWithCommas((2n**63n)/(1000n*86400n*365n)));
+
+  console.error(numberWithCommas((2n**31n)/(86400n*365n)));
+
+  
+  return numberWithCommas(foo);
+};

samples/common/v8class.js

@@ -0,0 +1,22 @@
+function main() {   
+  const animal = new Animal('Cat')
+  animal.printName(); // Cat
+  Animal.beProud();
+  console.info(JSON.stringify(animal));
+  return animal;
+};
+
+class Animal {
+ constructor(name) {
+   this.name = name
+ }
+ //static legCount = 4
+
+ static beProud() {
+   console.log('I AM AN ANIMAL')
+ }
+
+ printName() {
+   console.log(this.name)
+ }
+}

samples/common/v8factor.js

@@ -0,0 +1,13 @@
+function calculate(num) {
+   var str = "0";
+   for (i = 1; i <= num; i++) {
+       if (num % i == 0) {
+           str += ',' + i;
+       }
+   }
+   return str;
+}
+
+function main(){
+  return calculate( 2019 );
+}

samples/common/v8factorial.js

@@ -0,0 +1,13 @@
+var factorial = function(number) { 
+  if (number <= 0) { // terminal case
+    return 1; 
+  } else { // block to execute 
+    return (number * factorial(number - 1)); 
+  } 
+}; 
+
+function main() {
+  var r = factorial(8);
+  return r;
+}
+

samples/common/v8file.js

@@ -0,0 +1,10 @@
+function main() {
+
+  _write("/storage/emulated/0/jstest/test.json", "hello world: "+ new Date());
+  
+  var content = _read("/storage/emulated/0/jstest/test.json");
+  
+  console.log(content);
+   
+  return "";
+};

samples/common/v8input.js

@@ -1,12 +1,12 @@
-//simple test function
 function main() { 
-  _log("main");
+  console.log("main");
+
   var ret = _inputForm("Input:");
 
-  _log(parseInt(ret) + 1);
+  console.log(parseInt(ret) + 1);
 
   var foo = "V8: " + ret + " finished!"
   return foo; 
 };
 
-    
+    

samples/common/v8loop.js

@@ -0,0 +1,22 @@
+//!require(leftpad.js)
+
+let max = 30;
+let text = "*du Lauch* 💥";
+let count = 2;
+
+function print(i) {
+  return leftpad(text + "\n" , text.length+i%max," ");
+}
+
+function main() { 
+  var foo = ""; 
+  text = _inputForm("Input:",text)
+  for (var j=1; j<count; j++){
+    for (i=1;i<=max-1;i++)
+      foo += print(i);  
+    for (i=max-1;i>0;i--)
+      foo += print(i);
+  }
+  return foo; 
+};
+