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test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; variations with Ordering in Rojo's answer using Part instead of Extract:
First[test[[Alltest[[Ordering[test[[All, 1]][[Ordering[test[[All2]], 2]]1]]][[1, 1]]]]1]] or
First[#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]]] or
test[[Ordering[test, 1, #1[[2]] < #2[[2]] &]]][[1, 1]] (* 0 *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; variations with Ordering in Rojo's answer using Part instead of Extract:
First[test[[All, 1]][[Ordering[test[[All, 2]], 1]]]] or
First[#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]]] or
test[[Ordering[test, 1, #1[[2]] < #2[[2]] &]]][[1, 1]] (* 0 *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; variations with Ordering in Rojo's answer using Part instead of Extract:
test[[Ordering[test[[All, 2]], 1]]][[1, 1]] or
First[#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]]] or
test[[Ordering[test, 1, #1[[2]] < #2[[2]] &]]][[1, 1]] (* 0 *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; a variation onvariations with Ordering in Rojo's answer using Part instead of Extract:
test[[AllFirst[test[[All, 1]][[Ordering[test[[All, 2]], 1]]]1]]]] or
#[[1]][[Ordering[#[[2]]First[#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]]&[Transpose[test]]] or
test[[Ordering[test, 1, #1[[2]] < #2[[2]] &]]][[1, 1]] (* {0} *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; a variation on Rojo's answer using Part instead of Extract:
test[[All, 1]][[Ordering[test[[All, 2]], 1]]] or
#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]] (* {0} *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; variations with Ordering in Rojo's answer using Part instead of Extract:
First[test[[All, 1]][[Ordering[test[[All, 2]], 1]]]] or
First[#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]]] or
test[[Ordering[test, 1, #1[[2]] < #2[[2]] &]]][[1, 1]] (* 0 *) With
test = {{15, 11}, {5, 14}, {2, 13}, {3, 5}, {13, 15}, {6, 10}, {8, 15}, {0,2}, {10, 13}, {2, 5}}; a variation on Rojo's answer using Part instead of Extract:
test[[All, 1]][[Ordering[test[[All, 2]], 1]]] or
#[[1]][[Ordering[#[[2]], 1]]] &[Transpose[test]] (* {0} *)