size | 易学教程

phpMyAdmin: Can't import huge database file, any suggestions?

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问题 I recently got a new computer, so I thought I'd move all my web projects over. Moving the files was easy, however, moving the database seems to be a bit harder. I exported ALL databases using phpMyAdmin, and saved it to localhost.sql. Then I tried to import it on my new computer also using phpMyAdmin, and I get the error: No data to import. Either no filename was sent or the filesize exceeded the maximum allowed size. See FAQ 1.16. (This was translated from Swedish) I took a look at the FAQ,

My JFrame always becomes a few pixels too big.

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问题 I am working on this game in Java, and I just rewrote all my window related code from being based on java.awt to javax.swing. Soon after, I realized that things were a bit more complicated now, and so i did some research and and found out how to draw things, how to set the size of a JFrame, etc. But for some reason, the size of my JFrame always goes 10 pixels beyond the size I've specified it to become. In this case, I wanted it to be 640 by 640 pixels. Here's my code: package chrononaut;

Adapt the size of a form to its title text in C#

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问题 Is there a way to adapt the size of a form to the size of its title / caption text? For example, official C# Message Box forms will adjust to the size of its title text (Note the lorem ipsum ): Other forms will not adjust their size to that of their title text: Instead, an ellipsis is added at the end to fit the size mentioned in the "Size" property of the designer. Is there a way to make the form adjust to the size of the title instead of the size we mention? If not, is there a way to get

Sprite Kit OS X: SKTexture size property is incorrect

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问题 I'm testing a game on the OS X version of Sprite Kit, and find that some textures report their size incorrectly. I'm wondering if anyone else is seeing this problem and whether there is an explanation for it? Just to rule out any other issues before I report this as a bug. If this is a known bug, please say so. I'm loading this texture, it is 256x256 pixels in size: When I log the SKTexture created from this image, then the SKTexture description gives me the correct size but the size property

MySQL VARCHAR size limit

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问题 If I have a column in table with field of type VARCHAR(15) and if I try to insert data of length 16, MySQL gives an error stating Data too long for column 'testname' at row 1 Does anyone know why VARCHAR fields in MySQL take fixed length? Also how many bytes does a VARCHAR field take per record based on the size given? 回答1: If you set a column to be varchar(15) the maximum bytes allowed is 15. Thus you can't pass it more than 15 characters without modifying the column to support more than 15.

Physical disk size not correct (IoCtlDiskGetDriveGeometry)

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问题 I use the code below to get the physical disk size , but the size returned is not correct. I've checked the size with other tools. The code below reports Total disk space: 8.249.955.840 bytes and it should be Total disk space: 8.254.390.272 bytes How can I retrieve the actual/correct physical disk size? Tested on USB drives and normal hard drives. The code is long, here separate it in parts to show. The structure: [StructLayout(LayoutKind.Sequential)] internal struct DiskGeometry { public

Page count of Pdf with Java

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问题 at the moment I am using itext to read the page count of a pdf. This takes quite long because the lib seems to scan the whole file. Is the page information somewhere in the header of the pdf, or is a full filescan needed? 回答1: That's correct. iText parses quite a bit of a PDF when it is opened (it doesn't read the contents of stream objects, but that's about it)... UNLESS you use the PdfReader(RandomAccessFileOrArray) constructor, in which case it will only read the xrefs (mostly required),

Find files with size in Unix [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . I am looking for a Unix command to print the files with its size. I used this but it didn't work. find . -size +10000k -print. I want to print the size of the file along with the filename/directory. 回答1: find . -size +10000k -exec ls -sd {} + If your version of find won't accept the + notation (which acts rather

What's the maximum size of a numpy array?

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问题 I'm trying to create a matrix containing 2 708 000 000 elements. When I try to create a numpy array of this size it gives me a value error. Is there any way I can increase the maximum array size? a=np.arange(2708000000) ValueError Traceback (most recent call last) ValueError: Maximum allowed size exceeded 回答1: You're trying to create an array with 2.7 billion entries. If you're running 64-bit numpy, at 8 bytes per entry, that would be 20 GB in all. So almost certainly you just ran out of

org.springframework.jdbc.core.JdbcTemplate 使用注意事项

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 在使用JdbcTemplate.queryForMap(String )的时候发现一个问题：错误信息如下： org.springframework.dao.IncorrectResultSizeDataAccessException: Incorrect result size: expected 1, actual 0 通过查询官方API： https://docs.spring.io/spring/docs/2.0.x/javadoc-api/org/springframework/dao/EmptyResultDataAccessException.html Data access exception thrown when a result was expected to have at least one row (or element) but zero rows (or elements) were actually returned. 注意事项：如果要是有 queryForMap(sql)和qeuryForInt(sql)和qeuryForLong(sql) 要注意当Map 为空的时候会抛出异常。如果不想抛出这个异常，要么就用queryForList(sql)吧。来源： oschina