# how many months have exactly 30 days

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### Calendar query algorithm How to calculate howmanydays a day is the basis of knowledge

How do I calculate the day of the week? --Caille (Zeller) formulaWhat is the day of the week in history? What day of the week is the future? There are a number of computational formulae (two general calculation formulae and some piecewise

### Some issues to keep in mind when querying data from an Oracle database for the first few months

In a recent project, there is a requirement is to query the database in the previous months of historical data, but due to their own consideration does not completely cause the program bug, now this piece to make a good summary, I hope to no longer

### 30 Responses to a bug when the programmer encounters it

Developing applications is a very stressful job. No one is perfect, so in this industry, bugs in the code are quite common. In the face of bugs, some programmers will be angry, frustrated, distracted, and even discouraged, while others will remain

### It is said that people who have read the 21 stories have become billionaires before the age of 30. Are you next?

1. Jia went to buy cigarettes, smoke 29 yuan, but he didn't have a match. He said to the clerk, "By the way, let's get a box of matches ." The clerk did not give it. B went to buy cigarettes, smoke 29 yuan, he did not match, said to the Clerk:

### It is said that people who have read the 21 stories have become billionaires before the age of 30.

1. Jia went to buy cigarettes, smoke 29 yuan, but he didn't have a match. He said to the clerk, "By the way, let's get a box of matches ." The clerk did not give it.B went to buy cigarettes, smoke 29 yuan, he did not match, said to the Clerk: "cheap

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### 500 common Japanese sessions

1. Please wait until then. First meeting. 2. There are too many other users. Please take care of it. 3. zookeeper has been completed before (zookeeper) has been released. Please take care of it. 4. When there are too many threads, there are too many

### How to handle dates and times in Java 8

People often ask me what is the best way to learn a new library? My answer is to use it in the actual project. There are many real needs in the project that drive developers to explore and learn new libraries. Simply put, task-driven learning

### Calculate the day of the week

How to calculate the day of the week?Slowtiger published on 2009-11-19 08:42:00How to calculate the day of the week?--Caille (Zeller) formulaWhat is the day of the week in history? What day of the future is the week? With regard to this problem,

### Have tips on interface design

1 try to use single column instead of multiple columns layoutA single-column layout gives you better control of the overall situation. At the same time users can also at a glance content. More than one column will have the risk of distracting your

### 20 cases teach you how to handle dates and times in Java 8?

ObjectiveThe previous article wrote "How is SimpleDateFormat safe to use?" , which describes how SimpleDateFormat handles date/time, and how to ensure thread safety, and describes the DateTimeFormatter class, which is the default thread-safe for

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