built-in

How to unhide an overriden function?

由 情到浓时终转凉″ 提交于 2019-12-01 07:51:36
问题 Suppose I have my own function named zeros on the Matlab path. Now I want to call the built-in zeros . How can I do that? 回答1: Use the builtin function: builtin(function, arg1, ..., argN) In your case e.g.: builtin('zeros', 50) 来源： https://stackoverflow.com/questions/18205644/how-to-unhide-an-overriden-function

Autocompletion in dynamic language IDEs, specifically Python in PyDev

由 若如初见. 提交于 2019-12-01 06:23:24
I'm new to Python, with a background in statically typed languages including lots and lots of Java. I decided on PyDev in eclipse as an IDE after checking features/popularity etc. I was stunned that auto-complete doesn't seem to work properly for builtins. For example if I try automcomplete on datafile after: datafile = open(directory+"/"+account, 'r') datafile. No useful methods are suggested (e.g. realines). Only things like call . I am used to learning a language by jumping into class definitions and using lots of auto-complete to quickly view what a class will do. My PyDev 'interpreter' is

Autocompletion in dynamic language IDEs, specifically Python in PyDev

由 有些话、适合烂在心里 提交于 2019-12-01 05:31:25
问题 I'm new to Python, with a background in statically typed languages including lots and lots of Java. I decided on PyDev in eclipse as an IDE after checking features/popularity etc. I was stunned that auto-complete doesn't seem to work properly for builtins. For example if I try automcomplete on datafile after: datafile = open(directory+"/"+account, 'r') datafile. No useful methods are suggested (e.g. realines). Only things like call . I am used to learning a language by jumping into class

How do I reinstall a base-R package (e.g., stats, graphics, utils, etc.)?

由 谁说我不能喝 提交于 2019-12-01 05:17:36
I have been using the "stats" package in R 3.0.1 without any problems . But today i deleted the "stats" folder from the R library location and now I can't install it any more. I tried doing the same thing with other packages but I could install everything except "stats" install.packages("stats", dep = TRUE, repos="http://cran.cs.wwu.edu") ## Installing package into ‘%Default R Lib Installation Path%’ ## (as ‘lib’ is unspecified) ## Warning in install.packages : package ‘stats’ is not available (for R version 3.0.1) I also tried downloading it from other sources like " http://cran.ma.imperial

PHP return if isset [duplicate]

由 霸气de小男生 提交于 2019-12-01 04:44:23
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: Any more concise way to set default values? Is there a built-in php function like the following: function isset_get($array, $key, $default = null) { return isset($array[$key]) ? $array[$key] : $default; } I don't like $my_var = isset($my_array['some Key']) ? $my_array['some Key'] : ''; and would prefer $my_var = isset_get($my_array, 'some Key', ''); or something similar... 回答1: No. In my codebase we have several

List all built-in functions in javascript?

由 人走茶凉 提交于 2019-12-01 04:01:59
Is there a way in js to list all the builtin functions and some info on their parameterlists? I couldn't really find anything about reflection to do this sort of thing edit: The functions such as Math.sin are actually the ones I want to list, actually all built-in functions. Something like this, maybe? for( var x in window) { if( window[x] instanceof Function) console.log(x); } This will list all native functions in the console (excluding one in native objects, such as Math.sin() ). 来源： https://stackoverflow.com/questions/8693965/list-all-built-in-functions-in-javascript

Freestanding GCC and builtin functions

由 谁都会走 提交于 2019-11-30 22:49:31
The GCC docs at http://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html say (under -ffreestanding ) that a freestanding environment implies -fno-builtin . I might be misunderstanding exactly what a freestanding environment is or how it works, but it seems to me that, since the builtins usually emit inline code instead of calling the library function, this is ideal for a freestanding environment where the standard library may be missing functionality or even missing entirely. So why would we not want to use the biltins with a freestanding environment? Konstantin Vladimirov In freestanding mode

Python: Can a subclass of float take extra arguments in its constructor?

由 扶醉桌前 提交于 2019-11-30 16:50:22
问题 In Python 3.4, I'd like to create a subclass of float -- something that can be used in math and boolean operations like a float , but has other custom functionality and can receive an argument at initialization that controls that functionality. (Specifically, I wanted to have a custom __str__ and a parameter that is used in that method.) However, I can't seem to get a subclass of float to have a functional two-argument constructor. Why? Is this simply a limitation on extending built-in types?

No module named builtins

由 淺唱寂寞╮ 提交于 2019-11-30 14:37:46
问题 I'm trying to convert my .py script into an executable using py2exe. I've had a number of issues so far that have been largely addressed by the "options" in the setup file below. But now I have a problem that I have not been able to find a solution for, and wondering if others have had this same issue and fixed it. When I execute the setup file below using "python setup.py py2exe" it gives me an executable but when I run it, it complains "No module named builtins". The only other post I could

likely(x) and __builtin_expect((x),1)

由 [亡魂溺海] 提交于 2019-11-30 14:17:32
I know the kernel uses the likely and unlikely macros prodigiously. The docs for the macros are located at Built-in Function: long __builtin_expect (long exp, long c) . But they don't really discuss the details. How exactly does a compiler handle likely(x) and __builtin_expect((x),1) ? Is it handled by the code generator or the optimizer? Does it depend upon optimization levels? What's an example of the code generated? I just tested a simple example on gcc. For x86 this seems to be handled by the optimizer and depend on optimization levels. Although I guess a correct answer here would be "it
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