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Android Development Series (9): Create a database and complete simple CRUD operations, androidcrud This blog post mainly implements simple database creation and CRUD operations. First, create an Android Project named db 1. Complete database creation: You can use getWritableDatabase () and getReadableDatabase () in the SQLiteOpenHelper class to obtain the SQLiteDa

data the CGI response; char buff[256] = {0}; length = Read (child[0], buff, sizeof (buff)); if (length { printf ("read error from pipe\n"); } else { printf ("pid%d read data=%u\n%s", Getpid () , length, buff); } close (child[0]); if (Waitpid (PID, NULL, 0) { printf ("Waitpid error\n"); } exit (0); } else { /* Child */ //Close redundant handles, construct a single-function read-write channel close (parent[1]); close (child[0]); //The input end of the redirect pipeline to

Topic A and B two variables, without a third variable to toggle two variable valuesvar A=5;var b=6;a=a+b;b=a-b;a=a-b;alert (a); alert (b);Topic Two. There is a number n=5, without a For loop, how to return an array such as [1,2,3,4,5]Method one. To traverse with a recursive returnvar n=5;function show () {var arr=[];return (function () { arr.unshift (n); n--; if (n!=0) { Arguments.callee (); } return arr;}) ();} Alert (Show (n));Method Two: Use regular t

Complete analysis of array pointers and pointer arrays in C ++ (Series 1)Select blog from zosatapo Recently, we often see discussions about array pointers and pointer arrays at airports in forums. This is an indispensable step in learning C ++ and other languages,However, pointers are useful but difficult to use, so it is not easy to learn. Recently, I haveThere is no project to do, so you can write you