In python I could do something like:
seconds = [i[1] for i in my_giant_2d_matrix]
How can I do this in JS if my data structure is, eg:
["2017-08-01 17:05:57.27-08", 0.9685023945717632],
["2017-08-01 17:05:57.27-08", 1.8976437986779295],
["2017-08-01 17:05:57.27-08", 7.834808973859426],
["2017-08-01 17:05:57.27-08", 9.24775164641563],
["2017-08-01 17:05:57.27-08", 9.736525537982486],
["2017-08-01 17:05:57.27-08", 2.923580004727238],
["2017-08-01 17:05:57.27-08", 6.727439970979467],
["2017-08-01 17:05:57.27-08", 7.018190596386605],
["2017-08-01 17:05:57.27-08", 0.9126885492079035],
["2017-08-01 17:05:57.27-08", 10.42473448771042],
["2017-08-01 17:05:57.27-08", 8.150613247753153],
["2017-08-01 17:05:57.27-08", 7.603327591939451]...
I want the floats for all these (second value). Thanks.
You can use map
:
var matrix = [["2017-08-01 17:05:57.27-08", 0.9685023945717632], ["2017-08-01 17:05:57.27-08", 1.8976437986779295], ["2017-08-01 17:05:57.27-08", 7.834808973859426], ["2017-08-01 17:05:57.27-08", 9.24775164641563], ["2017-08-01 17:05:57.27-08", 9.736525537982486], ["2017-08-01 17:05:57.27-08", 2.923580004727238], ["2017-08-01 17:05:57.27-08", 6.727439970979467], ["2017-08-01 17:05:57.27-08", 7.018190596386605], ["2017-08-01 17:05:57.27-08", 0.9126885492079035], ["2017-08-01 17:05:57.27-08", 10.42473448771042], ["2017-08-01 17:05:57.27-08", 8.150613247753153], ["2017-08-01 17:05:57.27-08", 7.603327591939451]]; console.log( matrix.map(x => x[1]) )
seconds = array.map(el => el[1])
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