blob

I am working on a scientific project which requires several program abilities. After looking around for available tools I decided to work with Boost library which provided me needed features that C++ standard library does not provide such as date/time management, etc. My project is set of command line which process a bunch of data from a old, homemade, plain-text file-based database: import, conversion, analysis, reporting. Now I reached the point where I do need persistence. So I included boost::serialization that I found really useful. I am able to store and restore 'medium' dataset (not-so

I would like to generate a text file in the javascript dynamicly, then offer this for download. Currently I can get this working to a degree with either of the following solutions: content = "abc123"; document.location = "data:text/octet-stream," + encodeURIComponent(content); OR content = "abc123"; var bb = new BlobBuilder(); bb.append(content); var blob = bb.getBlob(); blob = blob.slice(0, blob.size, 'text/octet-stream'); var fr = new FileReader(); fr.onload = function() {document.location = this.result;} fr.readAsDataURL(blob); However, Both of these solutions, when the download box appears

为了了解git。了解git的原理，先从.git的文件 1.git的目录 hook info logs objects refs COMMIT_EDITMSG config description gitk.cache HEAD index packed-refs 12 cd .git //进入.git文件ls -al //查列表 文件夹解析 存储指向branch的最近一次commit对象的指针 hook:存放一些shell脚本 info:存放仓库的一些信息 logs:保存所有更新的引用记录 ==refs:== 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 第一步：cd refsls -al //可以看到列表heads,remotes和tagstotal 4drwxr-xr-x 1 Hades 197121 0 2月 5 14:36 ./drwxr-xr-x 1 Hades 197121 0 2月 5 23:21 ../drwxr-xr-x 1 Hades 197121 0 2月 5 14:36 heads/drwxr-xr-x 1 Hades 197121 0 2月 5 22:57 remotes/drwxr-xr-x 1 Hades

I've got a huge mysql table (called tcountriesnew ) and a column (called slogen, blob type ). In each of those slogen blobs I'd like to replace a word, for example: banana to apple . Unfortunately I tried to print all the rows with word banana, and it did not work. select * from tcountriesnew where slogen like '%banana%'; Please help me. What i missed, what is the problem with my query? How can i replace text in blob? Depends what you mean by "replace" show in select: select replace(slogen, 'bananas', 'apples') from tcountriesnew where slogen like '%bananas%'; Or update data in a table: update

I'm trying to upload a image in Windows Azure Blob and I'm geting the following error which I can't handle. Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. The error occurs when I try to create a container. container.CreateIfNotExists() Here is my code try { Microsoft.WindowsAzure.Storage.CloudStorageAccount storageAccount = Microsoft.WindowsAzure.Storage.CloudStorageAccount.Parse(ConfigurationManager.AppSettings["StorageConnectionString"]); CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient(); /

主要摘录自http://desktop.arcgis.com/zh-cn/arcmap/latest/analyze/main/what-is-geoprocessing.htm 容易忘记，挑重点看看 1、ArcPy 按工具、环境、函数、类和模块进行组织。 2、执行地理处理工具时，工具的结果会返回到 Result 对象中。通常，该对象是由工具生成或更新的输出数据集的路径。在其他情况下，它可能会包含其他类型的值，如数值或布尔值。如果工具的输出是多值参数，则这些值可在列表中以列表的形式返回。 以下代码示例显示了如何捕获返回值以及这些值的具体内容： 返回输出要素类的路径。该结果可用作其他函数的输入。 >>> result = arcpy.Buffer_analysis("rivers", "riverBuf", "50 METERS") >>> print result C:\Portland\Portland_OR.gdb\riverBuf >>> arcpy.Clip_analysis("streets", result, "streets_50m_of_rivers") 返回要素数目。 >>> result = arcpy.GetCount_management("streets_50m_of_rivers") >>> print result.getOutput(0) 54

文章来源:http://www.runoob.com/mysql/mysql-data-types.html MySQL 数据类型 MySQL中定义数据字段的类型对你数据库的优化是非常重要的。 MySQL支持多种类型，大致可以分为三类：数值、日期/时间和字符串(字符)类型。 数值类型 MySQL支持所有标准SQL数值数据类型。 这些类型包括严格数值数据类型(INTEGER、SMALLINT、DECIMAL和NUMERIC)，以及近似数值数据类型(FLOAT、REAL和DOUBLE PRECISION)。 关键字INT是INTEGER的同义词，关键字DEC是DECIMAL的同义词。 BIT数据类型保存位字段值，并且支持MyISAM、MEMORY、InnoDB和BDB表。 作为SQL标准的扩展，MySQL也支持整数类型TINYINT、MEDIUMINT和BIGINT。下面的表显示了需要的每个整数类型的存储和范围。 类型 大小 范围（有符号） 范围（无符号） 用途 TINYINT 1 字节 (-128，127) (0，255) 小整数值 SMALLINT 2 字节 (-32 768，32 767) (0，65 535) 大整数值 MEDIUMINT 3 字节 (-8 388 608，8 388 607) (0，16 777 215) 大整数值 INT或INTEGER 4 字节 (-2

There is a column type named blob in database, and it is used to store binary data. But more often than not, I see solutions which compress binary data, then convert binary data to base64, and store base64 string as varchar or text in database. Python code example: import zlib, base64 base64_str = base64.b64encode(zlib.compress(binary_data, 9)) So there are two ways to store binary data into database: as blob as compressed base64 My Questions is: Which way is better and why? It seems that I have to answer my own question. Most of the time, storing compressed base64 into database is not a good

I am working on saving files to sql blob to a varbinary(max) column, and have got the save side of things working now (I believe). What I can't figure out is how to read the data out, given that I'm retrieving my DB values using a stored procedure I should be able to access the column data like ds.Tables[0].Rows[0]["blobData"]; so is it necessary that I have an SQLCommand etc like I've seen in examples such as the one below: private void OpenFile(string selectedValue) { String connStr = "...connStr"; fileName = ddlFiles.GetItemText(ddlFiles.SelectedItem); using (SqlConnection conn = new