{"metadata":{"kernelspec":{"language":"python","display_name":"Python 3","name":"python3"},"language_info":{"pygments_lexer":"ipython3","nbconvert_exporter":"python","version":"3.6.4","file_extension":".py","codemirror_mode":{"name":"ipython","version":3},"name":"python","mimetype":"text/x-python"}},"nbformat_minor":4,"nbformat":4,"cells":[{"cell_type":"code","source":"from IPython.display import clear_output\n!pip3 install rx \nclear_output()\n\nimport rx \nfrom rx import of,operators as op","metadata":{"_uuid":"8f2839f25d086af736a60e9eeb907d3b93b6e0e5","_cell_guid":"b1076dfc-b9ad-4769-8c92-a6c4dae69d19","execution":{"iopub.status.busy":"2022-02-20T05:07:45.617267Z","iopub.execute_input":"2022-02-20T05:07:45.617612Z","iopub.status.idle":"2022-02-20T05:07:54.109611Z","shell.execute_reply.started":"2022-02-20T05:07:45.617560Z","shell.execute_reply":"2022-02-20T05:07:54.108632Z"},"trusted":true},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":"# 1.if DATA is not empty ","metadata":{}},{"cell_type":"code","source":"DATA = of(1,2,3)\nDEFAULT_VALUE = 100\n\nDATA.pipe(\n   op.default_if_empty(DEFAULT_VALUE)\n).subscribe(\n    on_next = lambda x:print(\"result = {0}\".format(x)),\n    on_error = lambda e :print(\"error = {0}\".format(e)),\n    on_completed = lambda : print(\"completed\")\n)","metadata":{"execution":{"iopub.status.busy":"2022-02-20T05:07:54.112099Z","iopub.execute_input":"2022-02-20T05:07:54.112447Z","iopub.status.idle":"2022-02-20T05:07:54.123153Z","shell.execute_reply.started":"2022-02-20T05:07:54.112404Z","shell.execute_reply":"2022-02-20T05:07:54.122311Z"},"trusted":true},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":"# 2.if DATA is empty ","metadata":{}},{"cell_type":"code","source":"DATA = of()\nDEFAULT_VALUE = 100\n\nDATA.pipe(\n   op.default_if_empty(DEFAULT_VALUE)\n).subscribe(\n    on_next = lambda x:print(\"result = {0}\".format(x)),\n    on_error = lambda e :print(\"error = {0}\".format(e)),\n    on_completed = lambda : print(\"completed\")\n)","metadata":{"execution":{"iopub.status.busy":"2022-02-20T05:07:54.124911Z","iopub.execute_input":"2022-02-20T05:07:54.125210Z","iopub.status.idle":"2022-02-20T05:07:54.137872Z","shell.execute_reply.started":"2022-02-20T05:07:54.125170Z","shell.execute_reply":"2022-02-20T05:07:54.136918Z"},"trusted":true},"execution_count":null,"outputs":[]},{"cell_type":"markdown","source":"# 3.if DATA is empty  + default value is empty","metadata":{}},{"cell_type":"code","source":"DATA = of()\n\nDATA.pipe(\n   op.default_if_empty()\n).subscribe(\n    on_next = lambda x:print(\"result = {0}\".format(x)),\n    on_error = lambda e :print(\"error = {0}\".format(e)),\n    on_completed = lambda : print(\"completed\")\n)","metadata":{"execution":{"iopub.status.busy":"2022-02-20T05:07:54.139124Z","iopub.execute_input":"2022-02-20T05:07:54.139845Z","iopub.status.idle":"2022-02-20T05:07:54.154871Z","shell.execute_reply.started":"2022-02-20T05:07:54.139797Z","shell.execute_reply":"2022-02-20T05:07:54.154167Z"},"trusted":true},"execution_count":null,"outputs":[]}]}