< H2 > 8259A Programmable interrupt Controller Port problem < H2 > ICW4 and OCW3 A total of 56 bytes need to be written, and its port is only 0x20,0x21 0xa0,0xa1 four ports, these ports are also one byte, how to write these 56 bytes into th...
new Vue ({.}). Mount (); does not add parameters here, but generally needs to add a dom selector. What is the operating mechanism when it is not added? can you analyze it from the source code level? Please give me more advice ...
...
preface there was a problem of promise turning on red, green and blue lights on the Internet before. Let me describe the problem again. topic: the red light is on once in three seconds, the green light is on once a second, and the yellow light is on...
1. Execute react-native init AwesomeProject 2.cd AwesomeProject 3.react-native run-ios saying that the index under this module cannot be resolved what should I do a. Look at the project node_modules folder and find that there is a react-tramsform-...
the axios, used starts at 415 and is changed to the request header Content-Type : application json;charset=utf-8 . After the request header, it begins to report 400. the upper parameter is originally like this . for some unknown reason, the int...