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Fórum gratis: ajuda mútua para usuários forumeiros Component Object Model Overview Unlike C++, COM provides a stable ABI that does not change between compiler releases. This makes COM interfaces attractive for object-oriented C++ libraries that are to be used by clients compiled using different compiler versions. History One of the first methods of interprocess communication in Windows was Dynamic Data Exchange (DDE), first introduced in 1987, that allowed sending and receiving messages in so-called "conversations" between applications. Object Linking and Embedding (OLE), Microsoft's first object-based framework, was built on top of DDE and designed specifically for compound documents. It was introduced with Word for Windows and Excel in 1991, and was later included with Windows, starting with version 3.1 in 1992. An example of a compound document is a spreadsheet embedded in a Word for Windows document: as changes are made to the spreadsheet within Excel, they appear automatically inside the Word document. Related technologies .NET
visual basic, vb, active server pages (ASP),java, javscript,c, c A Fast CSV Reader Introduction One would imagine that parsing CSV files is a straightforward and boring task. I was thinking that too, until I had to parse several CSV files of a couple GB each. After trying to use the OLEDB JET driver and various Regular Expressions, I still ran into serious performance problems. At this point, I decided I would try the custom class option. I scoured the net for existing code, but finding a correct, fast, and efficient CSV parser and reader is not so simple, whatever platform/language you fancy. I say correct in the sense that many implementations merely use some splitting method like String.Split(). And, this led to the CSV reader class I present in this article. Benchmarking it against both OLEDB and regex methods, it performs about 15 times faster, and yet its memory usage is very low. To give more down-to-earth numbers, with a 45 MB CSV file containing 145 fields and 50,000 records, the reader was processing about 30 MB/sec. Read about the latest updates here History
Category:Free computer libraries This category is for toolkits and libraries for application programmers which are distributed as free software - under a free software licence, with the source code available. Subcategories This category has the following 6 subcategories, out of 6 total. Pages in category "Free computer libraries" The following 165 pages are in this category, out of 165 total.