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Javascript 2021-10-23 04:18:10
mongo query by object id node js
//declare ObjectId from mongodb module const ObjectId = require('mongodb').ObjectId; //transform your param into an ObjectId var id = req.params.id; var good_id = new ObjectId(id); //you can now query Model.find({_id: good_id}) Add solution -
SQL 2021-10-13 16:28:04
bulk insert mysql from list of tuples
#function to transform your list into a string def stringify(v): return "('%s', '%s', %s, %s)" % (v[0], v[1], v[2], v[3]) #transform all to string v = map(stringify, row) #glue them together batchData = ", ".join(e for e in v) ... Add solution -
Other 2021-09-04 10:54:03
combine two coordiante matrixs into 1
x = np.linspace(x_min, x_max,num_x) y = np.linspace(y_min, y_max,num_y) XY = np.meshgrid(x,y) # Here you have a tuple of 2 coordinate matrix mat = np.array(XY).transpose() # Transpose will transform your (2,num_y,num_x) array into # the desired (num_x,n... Add solution
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