blob

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Using SQLite3 in Python, I am trying to store a compressed version of a snippet of UTF-8 HTML code. Code looks like this: ... c = connection.cursor() c.execute('create table blah (cid integer primary key,html blob)') ... c.execute('insert or ignore into blah values (?, ?)',(cid, zlib.compress(html))) At which point at get the error: sqlite3.ProgrammingError: You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Given this code (from someone else): var module = angular.module('myApp', []); module.controller('MyCtrl', function ($scope){ $scope.json = JSON.stringify({a:1, b:2}); }); module.directive('myDownload', function ($compile) { return { restrict:'E', scope:{ data: '=' }, link:function (scope, elm, attrs) { function getUrl(){ return URL.createObjectURL(new Blob([JSON.stringify(scope.data)], {type: "application/json"})); } elm.append($compile( '<a class="btn" download="backup.json"' + 'href="' + getUrl() + '">' + 'Download' + '</a>' )(scope));

How can I search in (put condition on) blob field in oracle, like text fields? I need someting like: select * from table_name where blob_field like '%00ff00ff%' Oracle throws some error on it. Michael Pakhantsov You can use dbms_lob.instr for this purpose i.e. select * from table_name where dbms_lob.instr(blob_field, utl_raw.CAST_TO_RAW('00ff00ff'), 1, 1) > 0 来源： https://stackoverflow.com/questions/4577986/conditions-like-like-on-binary-field-blob-in-oracle

where 与 on 的区别 ： ON：针对关联表进行条件筛选，不会影响结果集的数量和主表数据。 WHERE：针对结果集进行条件筛选，会影响结果集的数量。 LIKE声明中的%和_是什么意思？ --％对应于0个或更多字符，_只是LIKE语句中的一个字符。 blod text BLOB是一个二进制对象，可以容纳可变数量的数据。TEXT是一个不区分大小写的BLOB。 BLOB和TEXT类型之间的唯一区别在于对BLOB值进行排序和比较时区分大小写，对TEXT值不区分大小写。 mysql_fetch_array和mysql_fetch_object的区别： mysql_fetch_array（） – 将结果行作为关联数组或来自数据库的常规数组返回。 mysql_fetch_object – 从数据库返回结果行作为对象。 ibd : 数据 + 索引 每个MyISAM表格以三种格式存储在磁盘上： ·“.frm”文件存储表定义 ·数据文件具有“.MYD”（MYData）扩展名 索引文件具有“.MYI”（MYIndex）扩展名 NOW（）命令用于显示当前年份，月份，日期，小时，分钟和秒。 CURRENT_DATE（）仅显示当前年份，月份和日期。 sql 优化 ： explain出来的各种item的意义； select_type 表示查询中每个select子句的类型 type

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: On advice from a member and a previous post I'm running a query against multiple tables on an interspire shopping cart database that looks like this: SELECT c.customerid, c.custconfirstname, c.custconemail, o.ordstatus, o.orddate, GROUP_CONCAT( 'Order Id: ', orderid, ' | Product name: ', ordprodname, ' | Quantity: ', ordprodqty, '<br>' ) AS ordered_items FROM isc_customers c LEFT OUTER JOIN isc_orders o ON o.ordcustid = c.customerid LEFT OUTER JOIN isc_order_products op ON op.orderorderid = o.orderid LEFT OUTER JOIN isc_product_images pi ON

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I managed to store a picture in the Google App engine blob (I can see it in the Blob Viewer from the dashboard, and also in my app using a serving handler).. However, now that i have this picture there..i want to resize it while serving it to the client...Problem is that i can't do that...I can't make an Image out of that blob...This is my code : from google.appengine.api import images from google.appengine.ext import blobstore from google.appengine.ext.webapp import blobstore_handlers .... class Image(webapp2.RequestHandler): def get(self

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I know this question has been asked many times but I couldnot solve this using any of them. I am new to sqlite and cannot understand what I am doing wrong. WHAT I AM TRYING I am trying to make a profile view page. I am able to fetch all details from my sqlite database but i am not able to display my profile picture. TABLE STRUCTURE **username|landline|mobile|email|profilepicture** john |xxxxxxxx|xxxxxx|x@x.x|blob WHAT I TRIED $sql = "SELECT * FROM profile"; $query = $db->query($sql); while($row = $query->fetchArray(SQLITE3_ASSOC) ){ echo

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using the HTML5 Blob API to download a file from a JavaScript client in a WebView based macOS application: /** * Save a text as file using HTML <a> temporary element and Blob * @author Loreto Parisi */ var saveAsFile = function(fileName,fileContents) { if(typeof(Blob)!='undefined') { // using Blob var textFileAsBlob = new Blob([fileContents], { type: 'text/plain' }); var downloadLink = document.createElement("a"); downloadLink.download = fileName; if (window.webkitURL != null) { downloadLink.href = window.webkitURL.createObjectURL

This question already has an answer here: How can I add predefined length to audio recorded from MediaRecorder in Chrome? 3 answers I am writing a software that manipulates camera stream video in firefox. I am generating a Blob with video type recorded with MediaRecorder API . What i am doing to save the blob as video in local storage is using FileSaver library : FileSaver.saveAs(BlobVideo,"video.mp4"); It seems the video doesnt have any max duration, so i cannot navigate in timeline in my newly generated video in VLC, for example. Is there a way to set duration metadatas on a blob video?

I've written code that uses Angular $http to download a file. The name of the file is not specified in the URL. The URL contains a unique identifier for the file, which is fetched from outside the application. When $http.get(myUrl) is called, everything works fine; the file is retrieved and I can access it in my callback handler, but I can't see how to get the name of the file. Capturing the raw response with Fiddler, I see this: HTTP/1.1 200 OK Cache-Control: private Content-Length: 54 Content-Type: application/octet-stream Server: Microsoft-IIS/8.5 Access-Control-Allow-Origin: http://www