- INTERNATIONAL MORSE DECODER CODE
- INTERNATIONAL MORSE DECODER PROFESSIONAL
- INTERNATIONAL MORSE DECODER FREE
INTERNATIONAL MORSE DECODER CODE
In this kata you have to deal with "real-life" scenarios, when Morse code transmission speed slightly varies throughout the message as it is sent by a non-perfect human operator.
INTERNATIONAL MORSE DECODER FREE
The Morse code table is preloaded for you as MORSE_CODE dictionary (MorseCode class for Java), feel free to use it.Īll the test strings would be valid to the point that they could be reliably decoded as described above, so you may skip checking for errors and exceptions, just do your best in figuring out what the message is! Also if you have trouble discerning if the particular sequence of 1's is a dot or a dash, assume it's a dot.įunction decodeMorse(morseCode), that would take the output of the previous function and return a human-readable string.
Note that some extra 0's may naturally occur at the beginning and the end of a message, make sure to ignore them. , dashes - and spaces (one between characters, three between words) and return those as a string. That said, your task is to implement two functions:įunction decodeBits(bits), that should find out the transmission rate of the message, correctly decode the message to dots. After the message is fully received, it gets to you for decoding as a string containing only symbols 0 and 1.įor example, the message HEY JUDE, that is
INTERNATIONAL MORSE DECODER PROFESSIONAL
An amateur person may need a few seconds to transmit a single character, a skilled professional can transmit 60 words per minute, and robotic transmitters may go way faster.įor this kata we assume the message receiving is performed automatically by the hardware that checks the line periodically, and if the line is connected (the key at the remote station is down), 1 is recorded, and if the line is not connected (remote key is up), 0 is recorded. And in fact different operators would transmit at different speed. However, the standard does not specify how long that "time unit" is. Pause between words – is 7 time units long. Pause between characters inside a word – is 3 time units long. Pause between dots and dashes in a character – is 1 time unit long. When transmitting the Morse code, the international standard specifies that: The Morse code encodes every character being transmitted as a sequence of "dots" (short presses on the key) and "dashes" (long presses on the key). The table can be accessed like this: MORSE_CODE.Īll the test strings would contain valid Morse code, so you may skip checking for errors and exceptions.Įlectric telegraph is operated on a 2-wire line with a key that, when pressed, connects the wires together, which can be detected on a remote station. The Morse code table is preloaded for you as a dictionary, feel free to use it. Your task is to implement a function decodeMorse(morseCode), that would take the morse code as input and return a decoded human-readable string.ĭecodeMorse('. These special codes are treated as single special characters, and usually are transmitted as separate words.
In addition to letters, digits and some punctuation, there are some special service codes, the most notorious of those is the international distress signal SOS (that was first issued by Titanic), that is coded as
NOTE: Extra spaces before or after the code have no meaning and should be ignored. For example, the message HEY JUDE in Morse code is When the message is written in Morse code, a single space is used to separate the character codes and 3 spaces are used to separate words. The Morse code is case-insensitive, traditionally capital letters are used. The Morse code encodes every character as a sequence of "dots" and "dashes". While the Morse code is now mostly superceded by voice and digital data communication channels, it still has its use in some applications around the world. In this kata you have to write a simple Morse code decoder.
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