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Number Methods
The Number object contains only the default methods that are part of every object”s definition.
| Sr.No. | Method & Description |
|---|---|
| 1 | constructor()
Returns the function that created this object”s instance. By default this is the Number object. |
| 2 | toExponential()
Forces a number to display in exponential notation, even if the number is in the range in which JavaScript normally uses standard notation. |
| 3 | toFixed()
Formats a number with a specific number of digits to the right of the decimal. |
| 4 | toLocaleString()
Returns a string value version of the current number in a format that may vary according to a browser”s locale settings. |
| 5 | toPrecision()
Defines how many total digits (including digits to the left and right of the decimal) to display of a number. |
| 6 | toString()
Returns the string representation of the number”s value. |
| 7 | valueOf()
Returns the number”s value. |
Boolean Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | toSource()
Returns a string containing the source of the Boolean object; you can use this string to create an equivalent object. |
| 2 | toString()
Returns a string of either “true” or “false” depending upon the value of the object. |
| 3 | valueOf()
Returns the primitive value of the Boolean object. |
String Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | charAt()
Returns the character at the specified index. |
| 2 | charCodeAt()
Returns a number indicating the Unicode value of the character at the given index. |
| 3 | concat()
Combines the text of two strings and returns a new string. |
| 4 | indexOf()
Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found. |
| 5 | lastIndexOf()
Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found. |
| 6 | localeCompare()
Returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order. |
| 7 | length()
Returns the length of the string. |
| 8 | match()
Used to match a regular expression against a string. |
| 9 | replace()
Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring. |
| 10 | search()
Executes the search for a match between a regular expression and a specified string. |
| 11 | slice()
Extracts a section of a string and returns a new string. |
| 12 | split()
Splits a String object into an array of strings by separating the string into substrings. |
| 13 | substr()
Returns the characters in a string beginning at the specified location through the specified number of characters. |
| 14 | substring()
Returns the characters in a string between two indexes into the string. |
| 15 | toLocaleLowerCase()
The characters within a string are converted to lower case while respecting the current locale. |
| 16 | toLocaleUpperCase()
The characters within a string are converted to upper case while respecting the current locale. |
| 17 | toLowerCase()
Returns the calling string value converted to lower case. |
| 18 | toString()
Returns a string representing the specified object. |
| 19 | toUpperCase()
Returns the calling string value converted to uppercase. |
| 20 | valueOf()
Returns the primitive value of the specified object. |
String HTML wrappers
Here is a list of each method which returns a copy of the string wrapped inside the appropriate HTML tag.
| Sr.No. | Method & Description |
|---|---|
| 1 | anchor()
Creates an HTML anchor that is used as a hypertext target. |
| 2 | big()
Creates a string to be displayed in a big font as if it were in a <big> tag. |
| 3 | blink()
Creates a string to blink as if it were in a <blink> tag. |
| 4 | bold()
Creates a string to be displayed as bold as if it were in a <b> tag. |
| 5 | fixed()
Causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag |
| 6 | fontcolor()
Causes a string to be displayed in the specified color as if it were in a <font color=”color”> tag. |
| 7 | fontsize()
Causes a string to be displayed in the specified font size as if it were in a <font size=”size”> tag. |
| 8 | italics()
Causes a string to be italic, as if it were in an <i> tag. |
| 9 | link()
Creates an HTML hypertext link that requests another URL. |
| 10 | small()
Causes a string to be displayed in a small font, as if it were in a <small> tag. |
| 11 | strike()
Causes a string to be displayed as struck-out text, as if it were in a <strike> tag. |
| 12 | sub()
Causes a string to be displayed as a subscript, as if it were in a <sub> tag |
| 13 | sup()
Causes a string to be displayed as a superscript, as if it were in a <sup> tag |
Array Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | concat()
Returns a new array comprised of this array joined with other array(s) and/or value(s). |
| 2 | every()
Returns true if every element in this array satisfies the provided testing function. |
| 3 | filter()
Creates a new array with all of the elements of this array for which the provided filtering function returns true. |
| 4 | forEach()
Calls a function for each element in the array. |
| 5 | indexOf()
Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. |
| 6 | join()
Joins all elements of an array into a string. |
| 7 | lastIndexOf()
Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. |
| 8 | map()
Creates a new array with the results of calling a provided function on every element in this array. |
| 9 | pop()
Removes the last element from an array and returns that element. |
| 10 | push()
Adds one or more elements to the end of an array and returns the new length of the array. |
| 11 | reduce()
Apply a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value. |
| 12 | reduceRight()
Apply a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value. |
| 13 | reverse()
Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. |
| 14 | shift()
Removes the first element from an array and returns that element. |
| 15 | slice()
Extracts a section of an array and returns a new array. |
| 16 | some()
Returns true if at least one element in this array satisfies the provided testing function. |
| 17 | toSource()
Represents the source code of an object |
| 18 | sort()
Sorts the elements of an array. |
| 19 | splice()
Adds and/or removes elements from an array. |
| 20 | toString()
Returns a string representing the array and its elements. |
| 21 | unshift()
Adds one or more elements to the front of an array and returns the new length of the array. |
Date Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | Date()
Returns today”s date and time |
| 2 | getDate()
Returns the day of the month for the specified date according to local time. |
| 3 | getDay()
Returns the day of the week for the specified date according to local time. |
| 4 | getFullYear()
Returns the year of the specified date according to local time. |
| 5 | getHours()
Returns the hour in the specified date according to local time. |
| 6 | getMilliseconds()
Returns the milliseconds in the specified date according to local time. |
| 7 | getMinutes()
Returns the minutes in the specified date according to local time. |
| 8 | getMonth()
Returns the month in the specified date according to local time. |
| 9 | getSeconds()
Returns the seconds in the specified date according to local time. |
| 10 | getTime()
Returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC. |
| 11 | getTimezoneOffset()
Returns the time-zone offset in minutes for the current locale. |
| 12 | getUTCDate()
Returns the day (date) of the month in the specified date according to universal time. |
| 13 | getUTCDay()
Returns the day of the week in the specified date according to universal time. |
| 14 | getUTCFullYear()
Returns the year in the specified date according to universal time. |
| 15 | getUTCHours()
Returns the hours in the specified date according to universal time. |
| 16 | getUTCMilliseconds()
Returns the milliseconds in the specified date according to universal time. |
| 17 | getUTCMinutes()
Returns the minutes in the specified date according to universal time. |
| 18 | getUTCMonth()
Returns the month in the specified date according to universal time. |
| 19 | getUTCSeconds()
Returns the seconds in the specified date according to universal time. |
| 20 | getYear()
Deprecated – Returns the year in the specified date according to local time. Use getFullYear instead. |
| 21 | setDate()
Sets the day of the month for a specified date according to local time. |
| 22 | setFullYear()
Sets the full year for a specified date according to local time. |
| 23 | setHours()
Sets the hours for a specified date according to local time. |
| 24 | setMilliseconds()
Sets the milliseconds for a specified date according to local time. |
| 25 | setMinutes()
Sets the minutes for a specified date according to local time. |
| 26 | setMonth()
Sets the month for a specified date according to local time. |
| 27 | setSeconds()
Sets the seconds for a specified date according to local time. |
| 28 | setTime()
Sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC. |
| 29 | setUTCDate()
Sets the day of the month for a specified date according to universal time. |
| 30 | setUTCFullYear()
Sets the full year for a specified date according to universal time. |
| 31 | setUTCHours()
Sets the hour for a specified date according to universal time. |
| 32 | setUTCMilliseconds()
Sets the milliseconds for a specified date according to universal time. |
| 33 | setUTCMinutes()
Sets the minutes for a specified date according to universal time. |
| 34 | setUTCMonth()
Sets the month for a specified date according to universal time. |
| 35 | setUTCSeconds()
Sets the seconds for a specified date according to universal time. |
| 36 | setYear()
Deprecated – Sets the year for a specified date according to local time. Use setFullYear instead. |
| 37 | toDateString()
Returns the “date” portion of the Date as a human-readable string. |
| 38 | toGMTString()
Deprecated – Converts a date to a string, using the Internet GMT conventions. Use toUTCString instead. |
| 39 | toLocaleDateString()
Returns the “date” portion of the Date as a string, using the current locale”s conventions. |
| 40 | toLocaleFormat()
Converts a date to a string, using a format string. |
| 41 | toLocaleString()
Converts a date to a string, using the current locale”s conventions. |
| 42 | toLocaleTimeString()
Returns the “time” portion of the Date as a string, using the current locale”s conventions. |
| 43 | toSource()
Returns a string representing the source for an equivalent Date object; you can use this value to create a new object. |
| 44 | toString()
Returns a string representing the specified Date object. |
| 45 | toTimeString()
Returns the “time” portion of the Date as a human-readable string. |
| 46 | toUTCString()
Converts a date to a string, using the universal time convention. |
| 47 | valueOf()
Returns the primitive value of a Date object. |
Date Static Methods
In addition to the many instance methods listed previously, the Date object also defines two static methods. These methods are invoked through the Date( ) constructor itself −
| Sr.No. | Method & Description |
|---|---|
| 1 | Date.parse( )
Parses a string representation of a date and time and returns the internal millisecond representation of that date. |
| 2 | Date.UTC( )
Returns the millisecond representation of the specified UTC date and time. |
Math Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | abs()
Returns the absolute value of a number. |
| 2 | acos()
Returns the arccosine (in radians) of a number. |
| 3 | asin()
Returns the arcsine (in radians) of a number. |
| 4 | atan()
Returns the arctangent (in radians) of a number. |
| 5 | atan2()
Returns the arctangent of the quotient of its arguments. |
| 6 | ceil()
Returns the smallest integer greater than or equal to a number. |
| 7 | cos()
Returns the cosine of a number. |
| 8 | exp()
Returns EN, where N is the argument, and E is Euler”s constant, the base of the natural logarithm. |
| 9 | floor()
Returns the largest integer less than or equal to a number. |
| 10 | log()
Returns the natural logarithm (base E) of a number. |
| 11 | max()
Returns the largest of zero or more numbers. |
| 12 | min()
Returns the smallest of zero or more numbers. |
| 13 | pow()
Returns base to the exponent power, that is, base exponent. |
| 14 | random()
Returns a pseudo-random number between 0 and 1. |
| 15 | round()
Returns the value of a number rounded to the nearest integer. |
| 16 | sin()
Returns the sine of a number. |
| 17 | sqrt()
Returns the square root of a number. |
| 18 | tan()
Returns the tangent of a number. |
| 19 | toSource()
Returns the string “Math”. |
RegExp Methods
Here is a list of each method and its description.
| Sr.No. | Method & Description |
|---|---|
| 1 | exec()
Executes a search for a match in its string parameter. |
| 2 | test()
Tests for a match in its string parameter. |
| 3 | toSource()
Returns an object literal representing the specified object; you can use this value to create a new object. |
| 4 | toString()
Returns a string representing the specified object. |
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