Hello, lets assume that I have the following file format for my files,
fig_figure_mat2007_03_04_yield_2007_03_05
fig_figure_mat2008_03_07_yield_2008_03_08
fig_figure_mat2007_03_05_yield_2007_03_06
fig_figure_mat2008_04_05_yield_2008_04_06
How can I use regexp in this to sort the files out just by using the first bit of the date such as files are sorted in following order:
2007_03_04
2007_03_05
2008_03_07
2008_04_05
Best Answer