Fear makes one only weaker
Yesterday morning I received a call from one business partner complaining about two german students not satisfied with the internship position at another business partner…Continue readingFear makes one only weaker
The lean method
I knew there was something wrong with the management and how we do things at Yabroad, but it was difficult for me to convince other people…Continue readingThe lean method
Raspberry Pi as a toy web server
1. Tell my router to route certain traffic to the Raspberry Pi. For example, I route HTTP and SSH traffic to one of my Pi’s.…Continue readingRaspberry Pi as a toy web server
What’s important for a start-up
A friend of mine is considering to set up a startup company , here are the things I think are important for startup. Usually when…Continue readingWhat’s important for a start-up
NumPy’s ndarray indexing
In NumPy a new kind of array is provided: n-dimensional array or ndarray. It’s usually fixed-sized and accepts items of the same type and size. For…Continue readingNumPy’s ndarray indexing
Statistics of insurance sold on Taobao.com on Valentine’s Day
On Feb. 14th Taobao launched a campaign to sell insurance products, which promises 7% yearly interest rate. The sales data is public, so I wrote…Continue readingStatistics of insurance sold on Taobao.com on Valentine’s Day
Statistic analysis of 20 Million Hotel Reservations
I did a statistic analysis of the recently leaked 20 million hotel reservation records and here’re some preliminary results.
MapReduce in MongoDB
http://docs.mongodb.org/manual/core/map-reduce/ http://docs.mongodb.org/manual/reference/command/mapReduce/ > db.lattern_money_record.mapReduce( function() { emit(this.quantity, 1) }, function(key, values) { return Array.sum(values) }, { query: {‘quantity’: {$gt: 500}}, out: {inline: 1} } )…Continue readingMapReduce in MongoDB
The Last Battle: Long-term vs. Short-term Gains
During yesterday’s meeting the boss mentioned that our unpaid salary and bonus will be paid, when we have enough money, maybe in April when we…Continue readingThe Last Battle: Long-term vs. Short-term Gains
The Last Battle: My Fear
The day we reach an agreement to cut off employees was not a difficult day for me, as I always knew there would be a…Continue readingThe Last Battle: My Fear