### Basic Examples

Basic Examples

Replace parts 1, 3, and 4 with the rule :

ce

[{c,b,c,d},ce,{{1},{3},{4}}]

In[]:=

{e,b,e,d}

Out[]=

### Properties and Relations

Properties and Relations

ReplacePartWith

Position[{a,b,x,c,d,x,e},x]

In[]:=

{{3},{6}}

Out[]=

[{a,b,x,c,d,x,e},{xyy},{{3},{6}}]

In[]:=

{a,b,yy,c,d,yy,e}

Out[]=

ReplacePart[{c,b,c,d},{1e,2f,3g}]

In[]:=

{e,f,g,d}

Out[]=

ReplacePartWith

[{c,b,c,d},ce,{{1},{3},{4}}]

In[]:=

{e,b,e,d}

Out[]=

### Possible Issues

Possible Issues

Replacing an empty list of positions does not change the expression:

[h[a,b],_x,{}]

In[]:=

h[a,b]

Out[]=

Position corresponds to the whole expression:

{}

[h[a,b],_x,{{}}]

In[]:=

x

Out[]=