let arr = ['js', 'python', 'c++', 'dart']
// no 1
for (item of arr) {
console.log(item);
}
// no 2
for (var item = 0; item < arr.length; item++) {
console.log(arr[i]);
}
// no 3
arr.forEach(item=>{
console.log(item);
})
// no 4
arr.map(item=>{
console.log(item);
})
// no 5
var item = 0;
while (item < arr.length) {
console.log(arr[item]);
item++;
}
BaseException
+-- SystemExit
+-- KeyboardInterrupt
+-- GeneratorExit
+-- Exception
+-- StopIteration
+-- StopAsyncIteration
+-- ArithmeticError
| +-- FloatingPointError
| +-- OverflowError
| +-- ZeroDivisionError
+-- AssertionError
+-- AttributeError
+-- BufferError
+-- EOFError
+-- ImportError
| +-- ModuleNotFoundError
+-- LookupError
| +-- IndexError
| +-- KeyError
+-- MemoryError
+-- NameError
| +-- UnboundLocalError
+-- OSError
| +-- BlockingIOError
| +-- ChildProcessError
| +-- ConnectionError
| | +-- BrokenPipeError
| | +-- ConnectionAbortedError
| | +-- ConnectionRefusedError
| | +-- ConnectionResetError
| +-- FileExistsError
| +-- FileNotFoundError
| +-- InterruptedError
| +-- IsADirectoryError
| +-- NotADirectoryError
| +-- PermissionError
| +-- ProcessLookupError
| +-- TimeoutError
+-- ReferenceError
+-- RuntimeError
| +-- NotImplementedError
| +-- RecursionError
+-- SyntaxError
| +-- IndentationError
| +-- TabError
+-- SystemError
+-- TypeError
+-- ValueError
| +-- UnicodeError
| +-- UnicodeDecodeError
| +-- UnicodeEncodeError
| +-- UnicodeTranslateError
+-- Warning
+-- DeprecationWarning
+-- PendingDeprecationWarning
+-- RuntimeWarning
+-- SyntaxWarning
+-- UserWarning
+-- FutureWarning
+-- ImportWarning
+-- UnicodeWarning
+-- BytesWarning
+-- ResourceWarningmoment().format('MMMM Do YYYY, h:mm:ss a'); // December 5th 2021, 7:39:21 pm
moment().format('dddd'); // Sunday
moment().format("MMM Do YY"); // Dec 5th 21
moment().format('YYYY [escaped] YYYY'); // 2021 escaped 2021
moment().format(); // 2021-12-05T19:39:21-08:00String.prototype.replaceAt = function (index, char) {
return this.substr(0, index) + char + this.substr(index + char.length);
}
mystring.replaceAt(4, '')
Array
(
[id] => 11
[username] => Edona!!!
[password] => password
)
/**
* !What is Hoisting --------------->
* *Hoisting is a phenomena where we can access the variables and functions before initialization
*/
myFunc("Jassi"); // my name is Jassi
console.log(a); // undefined
var a = 5;
function myFunction(a) {
var b = `my name is ${a}`;
console.log(b);
}###beforePreTest END###4 2
4 2
3 1$ bower install bootstrap-sweetalertlet firstName = 'Alice';
firstName = 'Bob';