14
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The challenge is simple: Determine the type of an input, and output an identifier telling what type it is.

  • "UI", Unsigned integer: 0, 1,34, 111111111111111111111111111111111111111111
  • "SI", Signed integer: +0, +1, +42, -1, -3, -111111111111111111111111111111111111111111
  • "UD", Unsigned decimal: 0.0, 1.23, 1234.1234
  • "SD", Signed decimal: -0.0, +0.0, -1.235
  • "LE", Letter: a-z and A-Z
  • "SY", Symbol: ASCII code points: [32-47, 58-64, 91-96, 123-126] (i.e. all characters except numbers and letters)
  • "ST", String: Two or more character that can't be parsed as any of the above number formats

Rules:

  • The input will be 1-99 characters long
  • The input will only contain printable ASCII characters, code points: 32-126.
  • The output should be the two identifier letters as defined above (UI, SI ...)
  • Standard I/O rules apply

Examples:

UI:
0
01
34
12938219383278319086135768712319838871631827319218923

SI:
-0
+01
+1
-123
+123

UD:
0.0
3.1415
2.718281828459045235360287471352662497757

SD:
+0.0
-3.1415
+2.718281828459045235360287471352662497757

LE:
a
k
L
Z

SY:
@
"
+
-

ST:
Hello, World!
f2!"
+23df
1234A
'"!
.012
1.
UI
+-1
5+3
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  • \$\begingroup\$ Can SY be more than one character? \$\endgroup\$ – FryAmTheEggman Mar 31 '16 at 15:27
  • \$\begingroup\$ I would not consider 111111111111111111111111111111111111111111 to be of integer type. \$\endgroup\$ – Matt Mar 31 '16 at 16:31
  • \$\begingroup\$ @FryAmTheEggman sy is only one character. \$\endgroup\$ – Stewie Griffin Mar 31 '16 at 17:01
  • \$\begingroup\$ So we take the input as a string? \$\endgroup\$ – lirtosiast Mar 31 '16 at 17:03
  • 6
    \$\begingroup\$ @Matt, It might not be a uint8 or int64, but it's definitely an integer. \$\endgroup\$ – Stewie Griffin Mar 31 '16 at 21:35

10 Answers 10

0
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Pyth - 47 bytes

Can prolly golf a few bytes off with some slicing tricks.

.x-+?@z"+-"\S\U?@z\.\D\Isz?!tz?}rzZG"LE""SY""ST

Test Suite.

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5
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JavaScript (ES6), 99

x=>(z=x.match(/^([+-])?\d+(\.\d+)?$/))?'SU'[+!z[1]]+'DI'[+!z[2]]:x[1]?'ST':parseInt(x,36)?'LE':'SY'

Test

f=x=>(z=x.match(/^([+-])?\d+(\.\d+)?$/))?'SU'[+!z[1]]+'DI'[+!z[2]]:x[1]?'ST':parseInt(x,36)?'LE':'SY'

console.log=x=>O.textContent+=x+'\n'

;console.log(['0','01','34','12938219383278319086135768712319838871631827319218923'].map(x=>f(x)+' '+x).join`\n`)
;console.log(['-0','+01','+1','-123','+123'].map(x=>f(x)+' '+x).join`\n`)
;console.log(['0.0','3.1415','2.718281828459045235360287471352662497757'].map(x=>f(x)+' '+x).join`\n`)
;console.log(['+0.0','-3.1415','+2.718281828459045235360287471352662497757'].map(x=>f(x)+' '+x).join`\n`)
;console.log([...'akLZ'].map(x=>f(x)+' '+x).join`\n`)
;console.log([...'@"+-'].map(x=>f(x)+' '+x).join`\n`)
;console.log(['Hello, World!','f2!"','+23df','1234A',`'"!`,'.012','1.','UI','+-1','5+3'].map(x=>f(x)+' '+x).join`\n`)
<pre id=O></pre>

|improve this answer
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  • 1
    \$\begingroup\$ I was pretty sure that someone would be able to optimise for shared cases but I like your use of parseInt to detect letters. \$\endgroup\$ – Neil Apr 1 '16 at 0:13
  • \$\begingroup\$ The first ( ) in your regex is not necessary \$\endgroup\$ – Awashi Apr 1 '16 at 7:25
  • \$\begingroup\$ @Awashi it is necessary as I need a capture group for the sign to differentiate S or U. \$\endgroup\$ – edc65 Apr 1 '16 at 7:57
  • \$\begingroup\$ @WashingtonGuedes no, it could be (\+|-) but no bytes saved \$\endgroup\$ – edc65 Apr 2 '16 at 8:31
2
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Turing Machine Code, 1544 bytes

Try it online!

0 + _ r s
0 - _ r s
0 0 _ r u
0 1 _ r u
0 2 _ r u
0 3 _ r u
0 4 _ r u
0 5 _ r u
0 6 _ r u
0 7 _ r u
0 8 _ r u
0 9 _ r u
0 a _ r l
0 b _ r l
0 c _ r l
0 d _ r l
0 e _ r l
0 f _ r l
0 g _ r l
0 h _ r l
0 i _ r l
0 j _ r l
0 k _ r l
0 l _ r l
0 m _ r l
0 n _ r l
0 o _ r l
0 p _ r l
0 q _ r l
0 r _ r l
0 s _ r l
0 t _ r l
0 u _ r l
0 v _ r l
0 w _ r l
0 x _ r l
0 y _ r l
0 z _ r l
0 A _ r l
0 B _ r l
0 C _ r l
0 D _ r l
0 E _ r l
0 F _ r l
0 G _ r l
0 H _ r l
0 I _ r l
0 J _ r l
0 K _ r l
0 L _ r l
0 M _ r l
0 N _ r l
0 O _ r l
0 P _ r l
0 Q _ r l
0 R _ r l
0 S _ r l
0 T _ r l
0 U _ r l
0 V _ r l
0 W _ r l
0 X _ r l
0 Y _ r l
0 Z _ r l
0 * _ r y
s 0 _ r s
s 1 _ r s
s 2 _ r s
s 3 _ r s
s 4 _ r s
s 5 _ r s
s 6 _ r s
s 7 _ r s
s 8 _ r s
s 9 _ r s
s . _ r d
s _ _ r i
s * _ r T
u 0 _ r u
u 1 _ r u
u 2 _ r u
u 3 _ r u
u 4 _ r u
u 5 _ r u
u 6 _ r u
u 7 _ r u
u 8 _ r u
u 9 _ r u
u . _ r D
u _ _ r I
u * _ r T
l _ _ r L
l * _ r T
y _ _ r S
y * _ r T
d 0 _ r d
d 1 _ r d
d 2 _ r d
d 3 _ r d
d 4 _ r d
d 5 _ r d
d 6 _ r d
d 7 _ r d
d 8 _ r d
d 9 _ r d
d _ _ r e
d * _ r T
i 0 _ r i
i 1 _ r i
i 2 _ r i
i 3 _ r i
i 4 _ r i
i 5 _ r i
i 6 _ r i
i 7 _ r i
i 8 _ r i
i 9 _ r i
i _ _ r j
i * _ r T
D 0 _ r D
D 1 _ r D
D 2 _ r D
D 3 _ r D
D 4 _ r D
D 5 _ r D
D 6 _ r D
D 7 _ r D
D 8 _ r D
D 9 _ r D
D _ _ r E
D * _ r T
I 0 _ r I
I 1 _ r I
I 2 _ r I
I 3 _ r I
I 4 _ r I
I 5 _ r I
I 6 _ r I
I 7 _ r I
I 8 _ r I
I 9 _ r I
I _ _ r J
I * _ r T
L * L r M
M * E r halt
S * S r Y
Y * Y r halt
e * S r f
f * D r halt
j * S r k
k * I r halt
E * U r f
J * U r k
T _ S r U
T * _ r T
U * T r halt
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  • 3
    \$\begingroup\$ Please include a fully-golfed version of the code. If the whitespace cannot be removed, it must be counted in the byte count. \$\endgroup\$ – Mego♦ Mar 31 '16 at 20:33
  • 1
    \$\begingroup\$ Looks like it can not be removed, the program does not work properly without spaces between the symbols. \$\endgroup\$ – Matthew Smith Mar 31 '16 at 20:41
  • \$\begingroup\$ It doesn't seem to classify "+-1" (from the examples) as a ST. \$\endgroup\$ – Xantix Apr 1 '16 at 1:05
2
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Retina, 98 97 bytes

A nice way to practise my regex skills indeed.

Try it online!

^(?![+-]?\d+(\.\d+)?$)..+
ST
^([+-]?)\d+$
$1UI
^([+-]?)\d+\.\d+$
$1UD
i`^[a-z]$
LE
^.$
SY
[+-]U
S
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  • 4
    \$\begingroup\$ You can change ^[a-zA-Z]$ to i`^[a-z]$ to save one byte \$\endgroup\$ – daavko Mar 31 '16 at 17:01
1
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Lua, 157 bytes

Try it online!

Golfed:

n=(...)m=string.match s=m(n,"^[+-]")and"S"or"U"print(m(n,"^[+-]?%d+%.%d+$")and s.."D"or m(n,"^[+-]?%d+")and s.."I"or m(n,"^%w$")and"LE"or#n==1 and"SY"or"ST")

Ungolfed:

n = "2.718281828459045"

s = n:sub(1,1):match("[+-]") and "S" or "U"

if n:match("^[+-]?%d+%.%d+$") then
    print(s.."D")
elseif n:match("^[+-]?%d+") then
    print(s.."I")
elseif n:match("^%w$") then
    print("LE")
elseif #n==1 then
    print("SY")
else
    print("ST")
end
|improve this answer
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1
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JavaScript (ES6), 125 120 bytes

s=>"UISIUDSDLESYST".substr(s.match(/^((\d+)|([+-]\d+)|(\d+\.\d+)|([+-]\d+\.\d+)|([A-Z])|(.)|(.*))$/i).indexOf(s,2)*2-4,2)

Alternative version, also 120 bytes:

s=>"STUISIUDSDLESY".substr(s.match(/^(?:(\d+)|([+-]\d+)|(\d+\.\d+)|([+-]\d+\.\d+)|([A-Z])|(.)|.*)$/i).lastIndexOf(s)*2,2)
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  • \$\begingroup\$ Surely the regex can be golfed with a regex eval(`/regex/`) constructor + template strings \$\endgroup\$ – Downgoat Mar 31 '16 at 22:47
0
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Java, 192 bytes

String t(String v){for(String[]x:new String[][]{{"\\d+","UI"},{"[-+]\\d+","SI"},{"\\d+\\.\\d+","UD"},{"[-+]\\d+\\.\\d+","SD"}})if(v.matches(x[0]))return x[1];return (v.length()==1?"SY":"ST");}
|improve this answer
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  • \$\begingroup\$ return (v.length()==1?"SY":"ST"); can be return v.length()<2?"SY":"ST"; (-3 bytes) Or it can be this: String t(String v){for(String x:"UI\\d+;SI[-+]\\d+;UD\\d+\\.\\d+;SD[-+]\\d+\\.\\d+".split(";"))if(v.matches(x.substring(2)))return x.substring(0,2);return v.length()<2?"SY":"ST";} (179 bytes) And in addition you could change String t(String v) to v-> when you use a Java 8 lambda. \$\endgroup\$ – Kevin Cruijssen Nov 16 '17 at 12:34
0
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Javascript (ES6), 138 bytes

I tried to use a replace to be more "fancy".

This creates an anonymous function that returns the string of the type.

s=>s.replace(/^((([+-])?(\d+)(\.\d+)?)|([a-z])|([ -~])|([^\0]*))$/i,(_,a,b,c,d,e,f,g)=>b?(c?'S':'U')+(e?'D':'I'):(f?'LE':'S'+(g?'Y':'T')))

Any tips to improving this will be entirely welcome.

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  • 1
    \$\begingroup\$ 1. should be ST, not UD. Change your \d* to \d+ \$\endgroup\$ – edc65 Mar 31 '16 at 23:23
  • \$\begingroup\$ @edc65 How? That's a decimal. That is the same as 1.0. \$\endgroup\$ – Ismael Miguel Mar 31 '16 at 23:24
  • \$\begingroup\$ It could be valid or not (I don't write 1. instead of 1) BUT It's not your choice or mine: there are the test cases \$\endgroup\$ – edc65 Mar 31 '16 at 23:26
  • \$\begingroup\$ @edc65 You're right. I skipped the VERY huge list. I've fixed it. Thanks! \$\endgroup\$ – Ismael Miguel Mar 31 '16 at 23:26
0
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Python 3.5 - 241 240 bytes:

(Saved 1 byte thanks to @CatsAreFluffy)

import re
def r(g):
 y={'^\d+$':'UI','^[+-]\d+$':'SI','^[0-9]\d*(\.\d+)?$':'UD','[+-](?=[0-9]\d*(\.\d+))':'SD','[a-zA-Z]+':'LE','^[^A-Za-z0-9]+$':'SY'};d=[y[i]for i in list(y.keys())if re.match(i,g)]
 if len(d)>0:return d[0]
 else:return'ST'

It may be a bit long, but does the job pretty much perfectly. This was a really good way to improve my regular expression skills. Thanks for the challenge. :) I will try and shorten it more if I can.

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  • \$\begingroup\$ You can move import re to outside the function to save a space. (Stupid iPad keyboard with no backticks) \$\endgroup\$ – CalculatorFeline Apr 1 '16 at 3:12
  • \$\begingroup\$ @CatsAreFluffy Yeah, I did not think of that. Thank you! :) \$\endgroup\$ – R. Kap Apr 1 '16 at 3:38
  • \$\begingroup\$ @CatsAreFluffy: Actually, the iOS keyboard does allow backticks! I found this out the other day when needing to write markdown using my iPhone :) meta.stackexchange.com/questions/133673/… \$\endgroup\$ – homersimpson Apr 1 '16 at 4:41
  • \$\begingroup\$ @CatsAreFluffy Nice! That's good to know. \$\endgroup\$ – R. Kap Apr 1 '16 at 4:41
  • \$\begingroup\$ Also len(d)>0==d>[] \$\endgroup\$ – CalculatorFeline Apr 1 '16 at 14:47
0
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Tcl 414 Bytes

ungolfed implementation, readable:

proc a b {
  if {[string index $b 0] eq "+" || [string index $b 0] eq "-"} {
    set c S
  } elseif {[string match {[A-Za-z]} $b]} {
    return LE
  } elseif {[regexp {^(?![+-]?\d+(\.\d+)?$)..+} $b]} {
    return ST
  } elseif {[regexp {[^a-zA-Z0-9.]} $b]} {
    return SY
  } else {
    set c U
  }
  if {[string match *.* $b]} {
    return $c\U
  } else {
    return $c\I
  }
}
puts [a $argv]
|improve this answer
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