Singular Manual: replace

| #### D.11.4.8 replace Procedure from library `findifs.lib` (see findifs_lib). Usage: replace(s,what,with); s,what,with strings Return: string Purpose: replaces in 's' all the substrings 'what' with substring 'with' Note: Example:
    LIB "findifs.lib";
    " EXAMPLE:";
    ==>  EXAMPLE:
    ring r = (0,dt,theta),Tt,dp;
    poly p = (Tt*dt+theta+1)^2+2;
    string s = texfactorize("",p);
    s;
    ==> $(dt^{2}\cdot Tt^{2}+(2dttheta+2dt)\cdot Tt+(theta^{2}+2theta+3))$
    s = replace(s,"Tt","T_t"); s;
    ==> $(dt^{2}\cdot T_t^{2}+(2dttheta+2dt)\cdot T_t+(theta^{2}+2theta+3))$
    s = replace(s,"dt","\\tri t"); s;
    ==> $(\tri t^{2}\cdot T_t^{2}+(2\tri ttheta+2\tri t)\cdot T_t+(theta^{2}+2the\
       ta+3))$
    s = replace(s,"theta","\\theta"); s;
    ==> $(\tri t^{2}\cdot T_t^{2}+(2\tri t\theta+2\tri t)\cdot T_t+(\theta^{2}+2\\
       theta+3))$

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