query data with spark paging. Ordinary sql () does not support paging sql statements. it is said that you can add a sequence to realize , but basically it is scala add a list of "id " information to the original Schema information . val schema: S...
cause at present, I want to do a drag-and-drop sorting and drawing function. After consideration and reference, it is found that most of the solutions are to change the elements to absolute positioning, and then interpolate left and top, through trans...
what is the idea of ios similar to map sdk to read picture resources from the basic resource database? ...
the cascade selector of element ui is intended to support multiple selections displayed in the column in the form of tag, as shown in figure html code <el-cascader :options="options" :show-all-levels="false"...
I want to upload video files like uploading pictures by TinyMCE in a rich text editor, but I can t find the relevant api. Do you guys have any ideas? ...
-sharp coding=utf-8 import serial cmd = [0xa5, 0x00, 0x09, 0x0a, 0xcc, 0x33, 0xc3, 0x3c, 0xa6] with serial.Serial( dev ttyAMA0 , 115200, timeout=1) as ser: for i in cmd: k = chr(i) ser.write(k) s = ser.read(10) print(s) ...