文字列Sとインデックスのリストを指定すると、その結果をの新しい値として使用しながら、の各インデックスの要素を削除してX変更SしSますS。

例えば、与えられたS = 'codegolf'とX = [1, 4, 4, 0, 2]、

0 1 2 3 4 5 6 7  |
c o d e g o l f  |  Remove 1
c d e g o l f    |  Remove 4
c d e g l f      |  Remove 4
c d e g f        |  Remove 0
d e g f          |  Remove 2
d e f

あなたの仕事は、このプロセスを実行しS、各操作の後に値を収集し、それぞれを順番に改行で表示することです。最終的な答えは

S = 'codegolf'
X = [1, 4, 4, 0, 2]

Answer:

codegolf
cdegolf
cdeglf
cdegf
degf
def

• これはコードゴルフですので、コードをできるだけ短くしてください。
• の値Xは常にの有効なインデックスであると想定Sでき、0ベースまたは1ベースのインデックスを使用できます。
• 文字列には [A-Za-z0-9]
• どちらか、Sまたはx空の場合があります。Sが空の場合、それxも空である必要があります。
• S文字列の代わりに文字のリストとして使用することもできます。
• 出力を印刷するか、文字列のリストを返すことができます。先頭と末尾の空白は許容されます。どんな形式の出力でも、読みやすいものであれば問題ありません。

テストケース

S = 'abc', x = [0]
'abc'
'bc'

S = 'abc', x = []
'abc'

S = 'abc', x = [2, 0, 0]
'abc'
'ab'
'b'
''

S = '', x = []
''

S = 'codegolfing', x = [10, 9, 8, 3, 2, 1, 0]
'codegolfing'
'codegolfin'
'codegolfi'
'codegolf'
'codgolf'
'cogolf'
'cgolf'
'golf'

Haskell、38 33バイト

s#i=take i s++drop(i+1)s
scanl(#)

簡単：インデックスiの前後の要素を繰り返し取得し、それらを再結合して結果を収集します。

オンラインでお試しください！

編集：@Lynnは5バイトを節約しました。ありがとう！

JavaScript（ES6）、57 50 48 45 42バイト

文字列を個々の文字の配列として取得し、元のカンマ区切り文字列とそれに続く各ステップのコンマ区切り文字列のサブ配列を含む配列を出力します。

s=>a=>[s+"",a.map(x=>s.splice(x,1)&&s+"")]

• Arnauldのおかげで3バイトが節約されまし た。ルーズな出力仕様を以前よりも酷使することを示唆していたため、さらに3バイトを節約するためにさらに乱用することになりました。

試して

o.innerText=JSON.stringify((f=

s=>a=>[s+"",a.map(x=>s.splice(x,1)&&s+"")]

)([...i.value="codegolf"])(j.value=[1,4,4,0,2]));oninput=_=>o.innerText=JSON.stringify(f([...i.value])(j.value.split`,`))

label,input{font-family:sans-serif;font-size:14px;height:20px;line-height:20px;vertical-align:middle}input{margin:0 5px 0 0;width:100px;}

<label for=i>String: </label><input id=i><label for=j>Indices: </label><input id=j><pre id=o>

説明

カリー化構文のパラメーターs（文字列配列）とa（整数配列）を介して2つの入力を受け取ります。つまり、で関数を呼び出しますf(s)(a)。

新しい配列を構築し、元の配列から始めsます。ただし、splice後で使用するメソッドは配列を変更するため、配列のコピーを作成する必要があります。コピーを作成するには、文字列に変換するだけです（空の文字列を追加するだけです）。

サブ配列を生成するにはmap、整数配列a（x現在の整数）を上書きし、各要素について、index spliceからs始まる1からの要素を取得しますx。変更したを返しs、再び文字列に変換してコピーを作成します。

Japt、6バイト

åjV uV

オンラインでテストしてください！

説明

UåjV uV   Implicit: U = array of integers, V = string
Uå        Cumulatively reduce U by
  j         removing the item at that index in the previous value,
   V        with an initial value of V.
     uV   Push V to the beginning of the result.

代わりに：

uQ åjV

UuQ       Push a quotation mark to the beginning of U.
    å     Cumulatively reduce by
     j      removing the item at that index in the previous value,
      V     with an initial value of V.

これ"は、インデックスでアイテムを削除しても何も行わず、元の文字列を返すためです。

殻、7バイト

G§+oh↑↓

最初に文字列を取得し、次に（1ベースの）インデックスを取得します。 オンラインでお試しください！

説明

G§+oh↑↓
G        Scan from left by function:
           Arguments are string, say s = "abcde", and index, say i = 3.
      ↓    Drop i elements: "de"
     ↑     Take i elements
   oh      and drop the last one: "ab"
 §+        Concatenate: "abde"
         Implicitly print list of strings on separate lines.

Python 2、43バイト

s,i=input()
for i in i+[0]:print s;s.pop(i)

オンラインでお試しください！

どんな形式の出力でも、読みやすいものであれば問題ありません。

したがって、これは文字のリストとして出力されます。

Python 2、47バイト

@LuisMendoが指摘したように、これは43バイトに短縮できますが、それはすでに@ErktheOutgolferのソリューションです。

a,b=input();print a
for i in b:a.pop(i);print a

オンラインでお試しください！

Java 8、78バイト

これは、カリー化されたラムダであり、from またはorのint[]コンシューマーです。出力は標準出力に出力されます。StringBuilderStringBuffer

l->s->{System.out.println(s);for(int i:l)System.out.println(s.delete(i,i+1));}

オンラインで試す

05AB1E、11バイト

v=ā0m0yǝÏ},

オンラインでお試しください！

v           # For each index:
 =          #   Print without popping
  ā         #   Push range(1, len(a) + 1)
   0m       #   Raise each to the power of 0. 
            #   This gives a list of equal length containing all 1s
     0yǝ    #   Put a 0 at the location that we want to remove
        Ï   #   Keep only the characters that correspond to a 1 in the new list
         }, # Print the last step

Mathematica, 70 bytes

(s=#;For[t=1,t<=Length@#2,Print@s;s=StringDrop[s,{#2[[t]]+1}];t++];s)&

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R, 46 32 bytes

function(S,X)Reduce(`[`,-X,S,,T)

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Takes input as a list of characters and X is 1-based. Reduce is the R equivalent of fold, the function in this case is [ which is subset. Iterates over -X because negative indexing in R removes the element, and init is set to S, with accum=TRUE so we accumulate the intermediate results.

R, 80 bytes

function(S,X,g=substring)Reduce(function(s,i)paste0(g(s,0,i-1),g(s,i+1)),X,S,,T)

2-argument function, takes X 1-indexed. Takes S as a string.

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Haskell, 33 bytes

scanl(\s i->take i s++drop(i+1)s)

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PowerShell, 94 84 bytes

param($s,$x)$a=[Collections.Generic.list[char]]$s;$x|%{-join$a;,$a|% r*t $_};-join$a

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Takes input $s as a string and $x as an explicit array. We then create $a based on $s as a list.

Arrays in PowerShell are fixed size (for our purposes here), so we need to use the lengthy [System.Collections.Generic.list] type in order to get access to the .removeAt() function, which does exactly what it says on the tin.

I sacrificed 10 bytes to include two -join statements to make the output pretty. OP has stated that outputting a list of chars is fine, so I could output just $a rather than -join$a, but that's really ugly in my opinion.

Saved 10 bytes thanks to briantist.

Python 2, 50 bytes

• Takes in string and list of indices

s,i=input()
for j in i+[0]:print s;s=s[:j]+s[j+1:]

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05AB1E, 9 7 bytes

=svõyǝ=

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=s        # Print original string, swap with indices.
  v       # Loop through indices...
   õyǝ    # Replace current index with empty string.

-2 thanks to idea from @ETHProductions.

Retina, 58 bytes

¶\d+
¶¶1$&$*
+1`(?=.*¶¶.(.)*)(((?<-1>.)*).(.*)¶)¶.*
$2$3$4

Try it online! Explanation:

¶\d+

Match the indices (which are never on the first line, so are always preceded by a newline).

¶¶1$&$*

Double-space the indices, convert to unary, and add 1 (because zeros are hard in Retina).

+1`

Repeatedly change the first match, which is always the current value of the string.

   (?=.*¶¶.(.)*)

Retrieve the next index in $#1.

                (           .    ¶)

Capture the string, including the $#1th character and one newline.

                 ((?<-1>.)*) (.*)

Separately capture the prefix and suffix of the $#1th character of the string.

                                   ¶.*

Match the index.

$2$3$4

Replace the string with itself and the index with the prefix and suffix of the $#1th character.

Pyth, 8 bytes

.u.DNYEz

Demonstration

Reduce, starting with the string and iterating over the list of indices, on the deletion function.

PowerShell, 54 58 bytes

param($s,$x),-1+$x|%{$z=$_;$i=0;-join($s=$s|?{$z-ne$i++})}

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Explanation

Takes input as a char array ([char[]]).

Iterates through the array of indices ($x) plus an injected first element of -1, then for each one, assigns the current element to $z, initializes $i to 0, then iterates through the array of characters ($s), returning a new array of only the characters whose index ($i) does not equal (-ne) the current index to exclude ($z). This new array is assigned back to $s, while simultaneously being returned (this happens when the assignment is done in parentheses). That returned result is -joined to form a string which is sent out to the pipeline.

Injecting -1 at the beginning ensures that the original string will be printed, since it's the first element and an index will never match -1.

q/kdb+, 27 10 bytes

Solution:

{x _\0N,y}

Examples:

q){x _\0N,y}["codegolf";1 4 4 0 2]
"codegolf"
"cdegolf"
"cdeglf"
"cdegf"
"degf"
"def"
q){x _\0N,y}["abc";0]
"abc"
"bc"
q){x _\0N,y}["abc";()]
"abc"
q){x _\0N,y}["abc";2 0 0]
"abc"
"ab"
,"b"
""    
q){x _\0N,y}["";()]
""

Explanation:

Takes advantage of the converge functionality \ as well as drop _.

{x _\0N,y}
{        } / lambda function, x and y are implicit variables
     0N,y  / join null to the front of list (y), drop null does nothing
   _\      / drop over (until result converges) printing each stage
 x         / the string (need the space as x_ could be a variable name)

Notes:

If we didn't need to print the original result, this would be 2 bytes in q:

q)_\["codegolfing";10 9 8 3 2 1 0]
"codegolfin"
"codegolfi"
"codegolf"
"codgolf"
"cogolf"
"cgolf"
"golf"

Perl 5, 55 bytes (54 + "-l")

sub{print($s=shift);for(@_){substr$s,$_,1,"";print$s}}

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MATL, 8 bytes

ii"t[]@(

Indexing is 1-based.

Try it online! Or verify the test cases.

Explanation

i      % Input string. Input has to be done explicitly so that the string
       % will be displayed even if the row vector of indices is empty
i      % Input row vector of indices
"      % For each
  t    %   Duplicate current string
  []   %   Push empty array
  @    %   Push current index
  (    %   Assignment indexing: write [] to string at specified index
       % End (implicit). Display stack (implicit)

C# (.NET Core), 87 87 74 70 bytes

S=>I=>{for(int i=0;;S=S.Remove(I[i++],1))System.Console.WriteLine(S);}

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Just goes to show that recursion isn't always the best solution. This is actually shorter than my original invalid answer. Still prints to STDOUT rather than returning, which is necessary because it ends with an error.

-4 bytes thanks to TheLethalCoder

C (gcc), 99 bytes

j;f(s,a,i)char*s;int*a;{puts(s);for(j=0;j<i;j++){memmove(s+a[j],s+a[j]+1,strlen(s)-a[j]);puts(s);}}

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Takes the string, array, and the length of the array.

Pyth, 10 bytes

Rule changes saved me 1 byte:

V+E0Q .(QN

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Pyth, 11 bytes

V+E0sQ .(QN

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Gaia, 9 bytes

+⟪Seḥ+⟫⊣ṣ

^{I should really add a "delete at index" function...}

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Explanation

+          Add the string to the list
 ⟪Seḥ+⟫⊣   Cumulatively reduce by this block:
  S         Split around index n
   e        Dump the list
    ḥ       Remove the first char of the second part
     +      Concatenate back together
        ṣ  Join the result with newlines

V, 12 bytes

òdt,GÙ@-|xHx

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This is 1-indexed, input is like:

11,10,9,4,3,2,1,
codegolfing

Explanation

ò              ' <M-r>ecursively until error
 dt,           ' (d)elete (t)o the next , (errors when no more commas)
    G          ' (G)oto the last line
     Ù         ' Duplicate it down
        |      ' Goto column ...
      @-       ' (deleted number from the short register)
         x     ' And delete the character there
          H    ' Go back home
           x   ' And delete the comma that I missed

Swift 3, 80 bytes

func f(l:[String],c:[Int]){var t=l;for i in c{print(t);t.remove(at:i)};print(t)}

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Pyth, 8 bytes

+zm=z.Dz

Test suite!

explanation

+zm=z.DzdQ    # implicit: input and iteration variable
  m      Q    # for each of the elements of the first input (the array of numbers, Q)
     .Dzd     # remove that index from the second input (the string, z)
   =z         # Store that new value in z
+z            # prepend the starting value

Python 2, 54

X,S=input()
for a in X:
    print S
    S=S[:a]+S[a+1:]
print S

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APL, 31 30 28 bytes

{⎕←⍺⋄⍵≡⍬:⍬⋄⍺[(⍳⍴⍺)~⊃⍵]∇1↓⍵}

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C# (Mono), 85 bytes

s=>a=>{for(int i=-2;++i<a.Count;)System.Console.WriteLine(s=i<0?s:s.Remove(a[i],1));}

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