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Data Types

Last updated: 2024-11-21 18:34:18
The WXS language currently supports the following data types:
number;
string;
boolean;
object;
function;
array;
date;
regexp;
number
Syntax
There are two types of numbers: integers and decimals.
var a = 10;
var PI = 3.141592653589793;
Properties
constructor: Returns the string "Number"
Methods
toString；
toLocaleString；
valueOf；
toFixed；
toExponential；
toPrecision。
For information on using the above methods, refer to the ES5 standard.
string
Syntax
here are two ways to write a string:
'hello world';
"hello world";
Properties
constructor：Returns the string "String";
length。
For explanations of properties other than constructor, refer to the ES5 standard.
Methods
toString；
valueOf；
charAt；
charCodeAt；
concat；
indexOf；
lastIndexOf；
localeCompare；
match；
replace；
search；
slice；
split；
substring；
toLowerCase；
toLocaleLowerCase；
toUpperCase；
toLocaleUpperCase；
trim。
For information on using the above methods, refer to the ES5 standard.
boolean
Syntax
Boolean values can take one of two values: true or false.
Properties
constructor：Returns the string "Boolean".
Methods
toString；
valueOf。
For information on using the above methods, refer to the ES5 standard.
object
Syntax
An object is a type of unordered key-value pair, which can be used in the following ways:
var o = {} // Generates a new empty object.
﻿
// Generates a new non-empty object.
o = {
  'string'  : 1,  //The object’s key can be a string.
  const_var : 2,  //The object’s key can also be an identifier that conforms to the variable definition rules.
  func      : {}, //The object’s value can be of any type.
};
﻿
//Object property read operation
console.log(1 === o['string']);
console.log(2 === o.const_var);
﻿
//Object property write operation
o['string']++;
o['string'] += 10;
o.const_var++;
o.const_var += 10;
﻿
//Object property read operation
console.log(12 === o['string']);
console.log(13 === o.const_var);
Properties
constructor: Returns the string "Object".
console.log("Object" === {k:"1",v:"2"}.constructor)
Methods
toString: Returns the string "[object Object]".
function
Syntax
function supports the following definition methods:
//Method 1
function a (x) {
  return x;
}
﻿
//Method 2
var b = function (x) {
  return x;
}
function also supports the following syntax (anonymous functions, closures, etc.):
var a = function (x) {
  return function () { return x;}
}
﻿
var b = a(100);
console.log( 100 === b() );
arguments
In function, you can use the arguments keyword. This keyword only has the following properties at present:
length: The number of arguments passed to the function.
[index]: Each argument passed to the function can be traversed by the index subscript.
Sample code:
var a = function(){
  console.log(3 === arguments.length);
  console.log(100 === arguments[0]);
  console.log(200 === arguments[1]);
  console.log(300 === arguments[2]);
};
a(100,200,300);
Properties
constructor: Returns the string "Function".
length: Returns the number of formal parameters of the function
Methods
toString: Returns the string "[function Function]".
Sample code:
var func = function (a,b,c) { }
﻿
console.log("Function" === func.constructor);
console.log(3 === func.length);
console.log("[function Function]" === func.toString());
array
Syntax
array supports the following definition methods:
var a = [];      // Generates a new empty array.
﻿
a = [1,"2",{},function(){}];  // Generates a new non-empty array, with array elements of any type.
Properties
constructor: Returns the string "Array";
length。
For explanations of properties other than constructor, refer to the ES5 standard.
Methods
toString；
concat；
join；
pop；
push；
reverse；
shift；
slice；
sort；
splice；
unshift；
indexOf；
lastIndexOf；
every；
some；
forEach；
map；
filter；
reduce；
reduceRight。
For information on using the above methods, refer to the ES5 standard.
date
Syntax
Generates the getDate function required by the date object and returns a current time object.
getDate()
getDate(milliseconds)
getDate(datestring)
getDate(year, month[, date[, hours[, minutes[, seconds[, milliseconds]]]]])
Parameters
milliseconds: The number of milliseconds from 00:00:00 UTC January 1, 1970.
datestring: The date string, in the format: "month day, year hours:minutes:seconds".
Sample code:
var date = getDate(); //Returns the current time object.
﻿
date = getDate(1500000000000);
// Fri Jul 14 2017 10:40:00 GMT+0800 (China Standard Time)
date = getDate('2017-7-14');
// Fri Jul 14 2017 00:00:00 GMT+0800 (China Standard Time)
date = getDate(2017, 6, 14, 10, 40, 0, 0);
// Fri Jul 14 2017 10:40:00 GMT+0800 (China Standard Time)
Properties
constructor: Returns the string "Date".
Methods
toString；
toDateString；
toTimeString；
toLocaleString；
toLocaleDateString；
toLocaleTimeString；
valueOf；
getTime；
getFullYear；
getUTCFullYear；
getMonth；
getUTCMonth；
getDate；
getUTCDate；
getDay；
getUTCDay；
getHours；
getUTCHours；
getMinutes；
getUTCMinutes；
getSeconds；
getUTCSeconds；
getMilliseconds；
getUTCMilliseconds；
getTimezoneOffset；
setTime；
setMilliseconds；
setUTCMilliseconds；
setSeconds；
setUTCSeconds；
setMinutes；
setUTCMinutes；
setHours；
setUTCHours；
setDate；
setUTCDate；
setMonth；
setUTCMonth；
setFullYear；
setUTCFullYear；
toUTCString；
toISOString；
toJSON。
For information on using the above methods, refer to the ES5 standard.
regexp
Syntax
Generates the getRegExp function to be used by the regexp object.
getRegExp(pattern[, flags])
Parameters:
pattern: The content of the regular expression.
flags: The modifiers. This field can only include the following characters:
g: global
i: ignoreCase
m: multiline
Sample code:
var a = getRegExp("x", "img");
console.log("x" === a.source);
console.log(true === a.global);
console.log(true === a.ignoreCase);
console.log(true === a.multiline);
Properties
constructor：Returns the string "RegExp"；
source；
global；
ignoreCase；
multiline；
lastIndex。
For explanations of properties other than constructor, refer to the ES5 standard.
Methods
exec；
test；
toString。
For information on using the above methods, refer to the ES5 standard.
﻿
9. Data Type Determination
constructor Property
You can use the constructor property to determine the data type.
Sample code:
var number = 10;
console.log( "Number" === number.constructor );
﻿
var string = "str";
console.log( "String" === string.constructor );
﻿
var boolean = true;
console.log( "Boolean" === boolean.constructor );
﻿
var object = {};
console.log( "Object" === object.constructor );
﻿
var func = function(){};
console.log( "Function" === func.constructor );
﻿
var array = [];
console.log( "Array" === array.constructor );
﻿
var date = getDate();
console.log( "Date" === date.constructor );
﻿
var regexp = getRegExp();
console.log( "RegExp" === regexp.constructor );
typeof
You can also use typeof to distinguish certain data types.
Sample code:
var number = 10;
var boolean = true;
var object = {};
var func = function(){};
var array = [];
var date = getDate();
var regexp = getRegExp();
﻿
console.log( 'number' === typeof number );
console.log( 'boolean' === typeof boolean );
console.log( 'object' === typeof object );
console.log( 'function' === typeof func );
console.log( 'object' === typeof array );
console.log( 'object' === typeof date );
console.log( 'object' === typeof regexp );
﻿
console.log( 'undefined' === typeof undefined );
console.log( 'object' === typeof null );
﻿
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Recent Pages

Data Types

number

Syntax

Properties

Methods

string

Syntax

Properties

Methods

boolean

Syntax

Properties

Methods

object

Syntax

Properties

Methods

function

Syntax

arguments

Properties

Methods

array

Syntax

Properties

Methods

date

Syntax

Properties

Methods

regexp

Syntax

Properties

Methods

9. Data Type Determination

constructor Property

typeof

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