options

问题 I have read about GCC\'s Options for Code Generation Conventions, but could not understand what \"Generate position-independent code (PIC)\" does. Please give an example to explain me what does it mean. 回答1: Position Independent Code means that the generated machine code is not dependent on being located at a specific address in order to work. E.g. jumps would be generated as relative rather than absolute. Pseudo-assembly: PIC: This would work whether the code was at address 100 or 1000 100:

问题 When I print a numpy array, I get a truncated representation, but I want the full array. Is there any way to do this? Examples: >>> numpy.arange(10000) array([ 0, 1, 2, ..., 9997, 9998, 9999]) >>> numpy.arange(10000).reshape(250,40) array([[ 0, 1, 2, ..., 37, 38, 39], [ 40, 41, 42, ..., 77, 78, 79], [ 80, 81, 82, ..., 117, 118, 119], ..., [9880, 9881, 9882, ..., 9917, 9918, 9919], [9920, 9921, 9922, ..., 9957, 9958, 9959], [9960, 9961, 9962, ..., 9997, 9998, 9999]]) 回答1: Use numpy.set

问题 Can I force R to use regular numbers instead of using the e+10 -like notation? I have: 1.810032e+09 # and 4 within the same vector and want to see: 1810032000 # and 4 I am creating output for an old fashioned program and I have to write a text file using cat . That works fine so far but I simply can\'t use the e+10 notation there. 回答1: This is a bit of a grey area. You need to recall that R will always invoke a print method, and these print methods listen to some options. Including 'scipen' -

问题 I got a select tag with some options in a HTML form: (the data will be collected and processed using PHP) Testing: <SELECT NAME=\"Testing\"> <OPTION VALUE=\"1\"> One <OPTION VALUE=\"2\"> Two <OPTION VALUE=\"3\"> Three </SELECT> Is it possible for an option to carry multiple values like when a user selects \"One\", then a few other values related to this option will be written to the Database. How should I design the SELECT Tag so that each of the options can carry one than one value like this

问题 I am building a web API. I found whenever I use Chrome to POST, GET to my API, there is always an OPTIONS request sent before the real request, which is quite annoying. Currently I get the server to ignore any OPTIONS requests. Now my questions is what\'s good to send an OPTIONS request to double the server\'s load? Is there any way to completely stop the browser from sending OPTIONS requests? 回答1: edit 2018-09-13 : added some precisions about this pre-flight request and how to avoid it at