An anonymous reader writes: Learning to write code has become something of a trendy thing to do. New York City Mayor Michael Bloomberg has said he intends to learn code this year. Estonia has recently announced a scheme with the aim of getting every 6-year-old in the Baltic state to learn programming skills. The demand has spawned a number of start-ups offering coding lessons. General Assembly, which teaches off-line courses, has recently opened up in London and is recruiting ahead of a launch in Berlin. On-line education site Codecademy landed $10 million to expand from its home base in New York. Zach Simms, the 22-year-old co-founder, said in an earlier interview with The Wall Street Journal that not everyone has to learn to code, but everybody “needs to learn the notions of algorithms, realizing what you can use code for.” But do they?