Javascript Memorization

Front 1

^

Back 1

Start of string

Hint 1

RegEx syntax

Front 2

$

Back 2

End of string

Hint 2

RegEx syntax

Front 3

.

Back 3

Any single character

Hint 3

RegEx syntax

Front 4

(a|b)

Back 4

a or b

Hint 4

RegEx syntax

Front 5

(...)

Back 5

Group section

Hint 5

RegEx syntax

Front 6

[abc]

Back 6

In range (a, b or c)

Hint 6

RegEx syntax

Front 7

[^abc]

Back 7

Not in range

Hint 7

RegEx syntax

Front 8

\s

Back 8

White space

Hint 8

RegEx syntax

Front 9

a?

Back 9

Zero or one of a

Hint 9

RegEx syntax

Front 10

a*

Back 10

Zero or more of a

Hint 10

RegEx syntax

Front 11

a*?

Back 11

Zero or more of a, ungreedy

Hint 11

RegEx syntax

Front 12

a+

Back 12

One or more of a

Hint 12

RegEx syntax

Front 13

a+?

Back 13

One or more of a, ungreedy

Hint 13

RegEx syntax

Front 14

a{3}

Back 14

Exactly 3 of a

Hint 14

RegEx syntax

Front 15

a{3,}

Back 15

3 or more of a

Hint 15

RegEx syntax

Front 16

a{,6}

Back 16

Up to 6 of a

Hint 16

RegEx syntax

Front 17

a{3,6}

Back 17

3 to 6 of a

Hint 17

RegEx syntax

Front 18

a{3,6}?

Back 18

3 to 6 of a, ungreedy

Hint 18

RegEx syntax

Front 19

\

Back 19

Escape character

Hint 19

RegEx syntax

Front 20

[:punct:]

Back 20

Any punctuation symbol

Hint 20

RegEx syntax

Front 21

[:space:]

Back 21

Any space character

Hint 21

RegEx syntax

Front 22

[:blank:]

Back 22

Space or tab

Hint 22

RegEx syntax

Front 23

g

Back 23

Global Match

Hint 23

Pattern Modifiers

Front 24

i

Back 24

Case-insensitive

Hint 24

Pattern Modifiers

Front 25

m

Back 25

Multiple lines

Hint 25

Pattern Modifiers

Front 26

exec()

Back 26

tests for a match in string, returns first matched text or null

Hint 26

RegEx Properties

Front 27

test()

Back 27

tests for match in string, returns t|f

Hint 27

RegEx Properties

Front 28

toString()

Back 28

returns string value of regular expressions

Hint 28

RegEx Properties

Front 29

global

Back 29

checks if "g" modifier is set for RegEx, returns t|f

Hint 29

RegEx Instances

Front 30

ignoreCase

Back 30

checks if "i" modifier is set for RegEx, returns t|f

Hint 30

RegEx Instances

Front 31

lastIndex

Back 31

specifies index at which to start next match, returns num

Hint 31

RegEx Instances

Front 32

multiline

Back 32

checks if "m" modifier is set for RegEx, returns t|f

Hint 32

RegEx Instances

Front 33

source

Back 33

returns the text of the RegEx pattern

Hint 33

RegEx Instances

Front 34

A.constructor

Back 34

returns function that created the array object's prototype

Hint 34

Arrays properties

Front 35

A.length

Back 35

sets or returns the number of objects in an array

Hint 35

Arrays properties

Front 36

A.prototype.name=value

Back 36

allows addition of new properties and methods to array

Hint 36

Arrays properties

Front 37

A.concat( B, C,...)

Back 37

returns new array containing values of joined arrays

Hint 37

Arrays Methods

Front 38

A.join( null|separator )

Back 38

joins elements of array into string and returns string

Hint 38

Arrays Methods

Front 39

A.pop()

Back 39

removes last element of array and returns shortened array

Hint 39

Arrays Methods

Front 40

A.push( item1, item2, ...)

Back 40

adds new items to end of array and returns enlarged array

Hint 40

Arrays Methods

Front 41

A.reverse()

Back 41

reverse order of elements in array and returns reversed array

Hint 41

Arrays Methods

Front 42

A.shift()

Back 42

removes first item in array and returns shortened array

Hint 42

Arrays Methods

Front 43

A.slice(n,m)

Back 43

returns selected elements in array starting at n and ending at m, negative values go from end of array and m can be omitted

Hint 43

Arrays Methods

Front 44

A.sort( null|sortfunction )

Back 44

sorts items of an array, null yields alphabetic and ascending

Hint 44

Arrays Methods

Front 45

A.splice(n,r,item1,item2,...)

Back 45

adds new items starting at n and removes r items starting at n, new items are optional

Hint 45

Arrays Methods

Front 46

A.unshift( item1, item2, ...)

Back 46

adds new items to beginning of array and returns enlarged array

Hint 46

Arrays Methods

Front 47

string.valueOf()

Back 47

returns primitive value of string object

Hint 47

Arrays Methods

Front 48

Math.abs(x)

Back 48

returns absolute value of number x

Hint 48

Number and Math

Front 49

Math.acos(x)

Back 49

returns arccosine of number x

Hint 49

Number and Math

Front 50

Math.asin(x)

Back 50

returns arcsine of number x

Hint 50

Number and Math

Front 51

Math.atan(x)

Back 51

returns arctangent of number x

Hint 51

Number and Math

Front 52

Math.atan2(y, x)

Back 52

returns arctangent of the quotient of y and x

Hint 52

Number and Math

Front 53

Math.ceil(x)

Back 53

returns number x rounded upwards to nearest integer

Hint 53

Number and Math

Front 54

Math.cos(x)

Back 54

returns cosine of number x

Hint 54

Number and Math

Front 55

Math.E

Back 55

returns Euler's number

Hint 55

Number and Math

Front 56

Math.exp(x)

Back 56

returns Ruler's number to the x power

Hint 56

Number and Math

Front 57

Math.floor(x)

Back 57

returns number x rounded downwards to nearest integer

Hint 57

Number and Math

Front 58

Math.LN10

Back 58

returns natural logarithm of 10

Hint 58

Number and Math

Front 59

Math.LN2

Back 59

returns natural logarithm of 2

Hint 59

Number and Math

Front 60

Math.log(x)

Back 60

returns natural logarithm of x

Hint 60

Number and Math

Front 61

Math.LOG10E

Back 61

returns base 10 logarithm of Euler's number

Hint 61

Number and Math

Front 62

Math.LOG2E

Back 62

returns base 2 logarithm of Euler's number

Hint 62

Number and Math

Front 63

Math.max(n1,n2,...)

Back 63

returns nx with highest value

Hint 63

Number and Math

Front 64

Number.MAX_VALUE

Back 64

returns largest possible number in javascript

Hint 64

Number and Math

Front 65

Number.MIN_Value

Back 65

returns smallest possible number in javascript

Hint 65

Number and Math

Front 66

Number.NaN

Back 66

property that indicates value is not a legal number

Hint 66

Number and Math

Front 67

isNaN(value)

Back 67

returns true if value is NaN and false if not

Hint 67

Number and Math

Front 68

Math.min(x1,x2,...)

Back 68

returns xn with lowest value

Hint 68

Number and Math

Front 69

Number.NEGATIVE_INFINITY

Back 69

property that represents -Infinity

Hint 69

Number and Math

Front 70

Math.PI

Back 70

returns the ratio of circle's area to the square of its radius

Hint 70

Number and Math

Front 71

Number.POSITIVE_INFINITY

Back 71

property that represents Infinity

Hint 71

Number and Math

Front 72

Math.pow(x,y)

Back 72

returns x to the y power

Hint 72

Number and Math

Front 73

Math.random()

Back 73

returns a rndom number from 0 up to but not including 1

Hint 73

Number and Math

Front 74

Math.round(x)

Back 74

returns number x rounded to nearest integer

Hint 74

Number and Math

Front 75

Math.sin(x)

Back 75

returns sine of number x

Hint 75

Number and Math

Front 76

Math.sqrt(x)

Back 76

returns the squre root of number x

Hint 76

Number and Math

Front 77

Math.SQRT1_2

Back 77

returns square root of 1/2

Hint 77

Number and Math

Front 78

Math.SQRT2

Back 78

returns the square root of 2

Hint 78

Number and Math

Front 79

Math.tan(x)

Back 79

returns the tangent of angle x in radians

Hint 79

Number and Math

Front 80

X.toExponential(x)

Back 80

returns number X in exponential notation with 0 <= x <= 20 digits after decimal

Hint 80

Number and Math

Front 81

X.toFixed(x)

Back 81

returns number X as string with x digits after the decimal

Hint 81

Number and Math

Front 82

X.toPrecision(x)

Back 82

returns number X formatted to x digits in length

Hint 82

Number and Math

Front 83

X.toString(radix)

Back 83

converts to string and returns result as base of specific radix

Hint 83

Number and Math

Front 84

X.valueOf()

Back 84

returns primative value of number X object

Hint 84

Number and Math

Front 85

str.charAt(index)

Back 85

returns character at specified index in string

Hint 85

Strings

Front 86

str.charCodeAt(index)

Back 86

returns unicode character at specified index in string

Hint 86

Strings

Front 87

str1.concat(str2,...)

Back 87

returns new string containing concatenated strings

Hint 87

Strings

Front 88

String.fromCharCode(n1,n2,..)

Back 88

returns unicode values nx as string

Hint 88

Strings

Front 89

str.indexOf(searchvalue,start)

Back 89

returns position of first occurrence of search value in string, optionally starting at index start from begging of string

Hint 89

Strings

Front 90

str.lastIndexOf(searchvalue,start)

Back 90

returns position of first occurrence of search value in string, optionally starting at index start from end of string

Hint 90

Strings

Front 91

str.length

Back 91

returns length property of string

Hint 91

Strings

Front 92

str.localeCompare(comparestring)

Back 92

returns -1|0|1 for: str sorted before comparestring|strings are equal|str sorted after compare string

Hint 92

Strings

Front 93

str.match(regexp)

Back 93

returns array object of matches for regexp on string

Hint 93

Strings

Front 94

str.replace(sreachvalue,newvalue)

Back 94

searches a string for searchvaule(s) and replaces with new value

Hint 94

Strings

Front 95

str.search(searchvalue)

Back 95

searches a string for searchvalue and returns index of first match found

Hint 95

Strings

Front 96

str.slice(start,end)

Back 96

returns new string from start to end indexes, end is optional

Hint 96

Strings

Front 97

str.split(separator,limit)

Back 97

searches for separator and returns array of strings optionally limited in items returned

Hint 97

Strings

Front 98

str.substr(start,length)

Back 98

returns new string from specified start index, length is optional and limits characters returned

Hint 98

Strings

Front 99

str.substring(start,end)

Back 99

returns new string from start to end not including end index, end is optional

Hint 99

Strings

Front 100

str.toLowerCase()

Back 100

returns new string with all lower case letters

Hint 100

Strings

Front 101

str.toUpperCase()

Back 101

returns new string with all uppercase characters

Hint 101

Strings

Front 102

str.toLocaleLowerCase()

Back 102

returns new string with all lower case letters, according to host's locale

Hint 102

Strings

Front 103

str.toLocaleUpperCase()

Back 103

returns new string with all uppercase characters, according to host's locale

Hint 103

Strings

Front 104

str.valueOf()

Back 104

returns primitive value of string

Hint 104

Strings

Front 105

decodeURI(uri)

Back 105

decodes uri

Hint 105

functions

Front 106

decodeURIComponent(uri)

Back 106

decodes uri component

Hint 106

functions

Front 107

encodeURI(uri)

Back 107

endoces special characters except: ,/?:@&=+$#

Hint 107

functions

Front 108

encodeURIComponent(uri)

Back 108

encodes special characters

Hint 108

functions

Front 109

eval(string)

Back 109

evaluates or executes an argument; only use in very special circumstances!!!

Hint 109

functions

Front 110

isFinite(value)

Back 110

returns t|f if value is a legal finite number, false if -/+ infinity or NaN

Hint 110

functions

Front 111

isNaN(value)

Back 111

returns t|f if value is an illegal number, true if value is NaN

Hint 111

functions

Front 112

Number(object)

Back 112

converts object argument to a number that represents the objects value

Hint 112

functions

Front 113

parseFloat(string)

Back 113

parses a string and returns a floating point number, only first number in string is returned!

Hint 113

functions

Front 114

parseInt(string,radix)

Back 114

parses string and returns integer, radix is optional and sets numeral system to be used

Hint 114

functions

Front 115

new String("string")

Back 115

instantiates a new string object

Hint 115

functions