大约有 40,000 项符合查询结果（耗时：0.0515秒） [XML]
Pointers vs. values in parameters and return values
... function values, and interface values are implemented with pointers internally, and a pointer to them is often redundant.
Elsewhere, use pointers for big structs or structs you'll have to change, and otherwise pass values, because getting things changed by surprise via a pointer is confusing.
O...
How to redirect stderr to null in cmd.exe
...However following will do almost the opposite of what some may expect copy foo.txt con >> bar 2>nul. bar will contain the text one file(s) copied and the console will containt the content of foo.txt.
– Patrick Fromberg
Jul 2 '14 at 8:31
...
How do I make a list of data frames?
...to your question, but you want to use = and not <- within the function call. If you use <-, you'll end up creating variables y1 and y2 in whatever environment you're working in:
d1 <- data.frame(y1 <- c(1, 2, 3), y2 <- c(4, 5, 6))
y1
# [1] 1 2 3
y2
# [1] 4 5 6
This won't have the s...
Emulating a do-while loop in Bash
...ing different, only that true is not a built-in in Bash. It's a program usually found in /bin.
– Fleshgrinder
Feb 12 at 22:07
1
...
How do you pass a function as a parameter in C?
...function returning type’’, as in 6.3.2.1. ". For example, this:
void foo(int bar(int, int));
is equivalent to this:
void foo(int (*bar)(int, int));
share
|
improve this answer
|
...
How to download a single commit-diff from GitHub?
...h (or .diff) to the commit-URL will give a nice patch:
https://github.com/foo/bar/commit/${SHA}.patch
Thanks to Ten Things You Didn't Know Git And GitHub Could Do...
share
|
improve this answer
...
How to define custom configuration variables in rails
... target a specific environment) :
YourApp::Application.config.yourKey = 'foo'
This will be accessible in controller or views like this:
YourApp::Application.config.yourKey
(YourApp should be replaced by your application name.)
Note: It's Ruby code, so if you have a lot of config keys, you ca...
Redirecting passed arguments to a windows batch file [duplicate]
I would like to call a jar file from a windows batch file. One requirement is to be able to pass all the batch file arguments as-is to the jar file invocation. For example,
...
Calculate a percent with SCSS/SASS
...kGinanto for px you can just add +px to the end of the line, e.g. width: ($foo + $bar) +px
– DisgruntledGoat
Mar 6 '13 at 21:52
2
...
Is it safe to use Project Lombok? [closed]
...tations and even simple JavaBean like generation with @Data . It could really help me, especially in 50 different event objects where you have up to 7 different fields that need to be constructed and hidden with getters. I could remove almost a thousand lines of code with this.
...