除了Cre/loxp跟FLP/FRT系统可以做conditional KO# Biology - 生物学
s*e
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Design an iterator for a collection of collections. The iterator should hide
the nesting, allowing you to iterate all of the elements belonging to all
of the collections as if you were working with a single collection.
For Example:
a={{1,2,3},4,{},{5,6,{7,{},{8}}},}.
The result of calling 8 time next() should be:
1,2,3,4,5,6,7,8.
the nesting, allowing you to iterate all of the elements belonging to all
of the collections as if you were working with a single collection.
For Example:
a={{1,2,3},4,{},{5,6,{7,{},{8}}},}.
The result of calling 8 time next() should be:
1,2,3,4,5,6,7,8.
