The Split(f, L) function splits list L at positions where procedure f returns true. The value of procedure f is determined by the expression $f\left(x\right)$ evaluated for each element x of list L.

The Split(f, L, opts) function performs in a similar manner, except that the value of procedure f is determined by the expression $f\left(x\,\mathrm{opts}\right)$.

If Split is indexed by a positive integer N, the expression $f\left({\mathrm{opt}}_1,...,{\mathrm{opt}}_{N-1},x,\mathrm{opts}\right)$ is evaluated for each list element x.

$\mathrm{with}\left(\mathrm{ListTools}\right)\:$

$L≔\left[''a''\,'',''\,''bc''\,''d''\,''e''\,'',''\,''f''\right]$

$L≔\left[''a''\,'',''\,''bc''\,''d''\,''e''\,'',''\,''f''\right]$

$\mathrm{Split}\left(\mathrm{`=`}\,L\,'',''\right)$

$\left[''a''\right],\left[''bc''\,''d''\,''e''\right],\left[''f''\right]$

$\mathrm{Digits}≔5$

$\mathrm{Digits}≔5$

$\mathrm{Split}\left(\mathrm{`>`}\,\left[\mathrm{seq}\left(\sin \left(2.0x\right)\,x=1..12\right)\right]\,-\frac{1}{2}\right)$

$\left[\right],\left[\mathrm{-0.75680}\right],\left[\right],\left[\mathrm{-0.54402}\,\mathrm{-0.53657}\right],\left[\right],\left[\mathrm{-0.75099}\right],\left[\right],\left[\mathrm{-0.90558}\right]$

$\mathrm{Split}\left[2\right]\left(\mathrm{verify}\,-\frac{1}{2}\,\left[\mathrm{seq}\left(\sin \left(2x\right)\,x=1..12\right)\right]\,\mathrm{less\_than}\right)$

$\left[\right],\left[\sin \left(4\right)\right],\left[\right],\left[\sin \left(10\right)\,\sin \left(12\right)\right],\left[\right],\left[\sin \left(18\right)\right],\left[\right],\left[\sin \left(24\right)\right]$