"""
Output functions
"""
def tex_from_array(a):
r"""
EXAMPLES::
sage: from sage.combinat.output import tex_from_array
sage: print tex_from_array([[1,2,3],[4,5]])
{\def\lr#1{\multicolumn{1}{|@{\hspace{.6ex}}c@{\hspace{.6ex}}|}{\raisebox{-.3ex}{$#1$}}}
\raisebox{-.6ex}{$\begin{array}[b]{ccc}
\cline{1-1}\cline{2-2}\cline{3-3}
\lr{1}&\lr{2}&\lr{3}\\
\cline{1-1}\cline{2-2}\cline{3-3}
\lr{4}&\lr{5}\\
\cline{1-1}\cline{2-2}
\end{array}$}
}
"""
rows = len(a)
cols = len(a[0])
s = ""
s += "{\\def\\lr#1{\\multicolumn{1}{|@{\\hspace{.6ex}}c@{\\hspace{.6ex}}|}{\\raisebox{-.3ex}{$#1$}}}\n"
s += "\\raisebox{-.6ex}{$"
s += "\\begin{array}[b]{"+"c"*cols+"}\n"
for j in range(cols):
if a[0][j] is not None:
s += "\\cline{" + str(j+1) + "-" + str(j+1) + "}"
s += "\n"
for i in range(rows):
cols = len(a[i])
if len(a[i])>0 and a[i][0] is not None:
for j in range(cols):
if a[i][j] is not None:
s += "\\lr{" + str(a[i][j]) + "}"
if j < cols-1:
s += "&"
s += "\\\\\n"
for j in range(cols):
if a[i][j] is not None:
s += "\\cline{" + str(j+1) + "-" + str(j+1) + "}"
s += "\n"
s += "\\end{array}$}\n}"
return s
