javascript pdf extract image

javascript pdf extract image

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The query shown in the foregoing example combines two criteria, one requesting recent messages (those that have arrived since August 20, 2010, the year that I am typing this) and the other asking that the message text have the word Apress somewhere inside, and the result will include only messages that satisfy the first criteria and that satisfy the second criteria that is the result of concatenating two criteria with a space so that they form a single string If instead you wanted messages that matched just one of the criteria, but not both, you can join them with an OR operator: OR (SINCE 20-Aug-2010) (TEXT Apress) There are many criteria that you can combine in order to form a query Like the rest of IMAP, they are specified in RFC 3501.

You ve got your mashup up and running, but suppose you want to add a little more to it. If you are comfortable with HTML, you can easily add it to your mashup. Click the Customize menu item at the bottom of the preview to return to the design surface. Click the Add Custom HTML to see a text area for you to type HTML markup; see Figure 3-11.

Storing Images in the Database Storing images in a database is not a straightforward task because there are no data types for storing graphics. Instead you have to rely on the BLOB type, which is a binary large object (in plain English: a chunk of raw data). The process of getting a QImage object into a blob can be broken down into three steps. First you create a buffer in memory and save the image to that buffer. The buffer is then converted to a QByteArray, which is bound to a variable in an SQL INSERT query. That query is then executed. This is all done in the addImage method shown in Listing 13-21. As you can see from the highlighted lines, a QBuffer object is created. The image is written to the buffer as a PNG with a QImageWriter. When the buffer contains the image data, you use the data from the buffer in a bindValue call when you prepare the INSERT query to put the image in the database. Looking at the rest of the code, you query the database for the number of images to be able to determine a new id. This method doesn t work if you let the user remove images from the database. It is possible to let the database assign a new id automatically using AUTOINCREMENT when creating the table. That would have solved the problem. But since you support only adding new images, i.e., not removing them, and it is assumed that only one client application is using the database at a time, this solution works.

Some criteria are quite simple, and refer to binary attributes like flags: ALL: Every message in the mailbox UID (id, ..): Messages with the given UIDs LARGER n: Messages more than n octets in length SMALLER m: Messages less than m octets in length ANSWERED: Have the flag \Answered DELETED: Have the flag \Deleted DRAFT: Have the flag \Draft FLAGGED: Have the flag \Flagged KEYWORD flag: Have the given keyword flag set NEW: Have the flag \Recent OLD: Lack the flag \Recent UNANSWERED: Lack the flag \Answered UNDELETED: Lack the flag \Deleted UNDRAFT: Lack the flag \Draft UNFLAGGED: Lack the flag \Flagged UNKEYWORD flag: Lack the given keyword flag UNSEEN: Lack the flag \Seen There are a number of flags that match items in each message s headers.

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