大约有 16,000 项符合查询结果（耗时：0.0276秒） [XML]
How do I properly compare strings in C?
...
@incompetent — if you read a line from a file with fgets(), then the string might be "abc\n" because fgets() keeps the newline. If you compare that with "abc", you will get 'not equal' because of the difference between a null byte terminating "ab...
How do you pass multiple enum values in C#?
Sometimes when reading others' C# code I see a method that will accept multiple enum values in a single parameter. I always thought it was kind of neat, but never looked into it.
...
SVN+SSH, not having to do ssh-add every time? (Mac OS)
...ssh/your_key_here. This adds the key to your keychain. Some places, I have read that this is enough, but I wasn't certain. This is also mac-specific, so if you need to do this on another unix flavor, you won't have this option necessarily.
For good measure, I edited the ~/.ssh/config file (you may ...
Is it possible to use 'else' in a list comprehension? [duplicate]
..., several expressions can be nested, resulting in more elses and harder to read code:
>>> ["A" if b=="e" else "d" if True else "x" for b in "comprehension"]
['d', 'd', 'd', 'd', 'd', 'A', 'd', 'A', 'd', 'd', 'd', 'd', 'd']
>>>
On a related note, a comprehension can also contain ...
Replace part of a string with another string
... Is this still the only solution in 2018? If so and any C++ committee are reading this, sort it out. It's embarrassing. split(string, string) and replace(string, string) please!
– user997112
Jul 31 '18 at 12:53
...
How does one reorder columns in a data frame?
...
@BramVanroy nope, c(1,3,"Var1", 2) will be read as c("1","3","Var1", "2") because vectors can contain data of only one type, so types are promoted to the most general type present. Because there are no columns with the character names "1", "3", etc. you'll get "undefi...
iPhone Safari Web App opens links in new window
... iOS 6.1 and with Bootstrap JS links (i.e dropdown menus etc)
$(document).ready(function(){
if (("standalone" in window.navigator) && window.navigator.standalone) {
// For iOS Apps
$('a').on('click', function(e){
e.preventDefault();
var ne...
Difference between Activity Context and Application Context
...access to different information about the application environment.
If you read the docs at getApplicationContext it notes that you should only use this if you need a context whose lifecycle is separate from the current context. This doesn't apply in either of your examples.
The Activity context pr...
How do I convert a dictionary to a JSON String in C#?
...ring values, you would be better off using a reputable JSON library that already knows how to handle things like escape characters and line breaks. Json.NET is a popular option.
share
|
improve thi...
When do we need curly braces around shell variables?
...without $ and without {}. You have to use
var=10
to assign. In order to read from the variable (in other words, 'expand' the variable), you must use $.
$var # use the variable
${var} # same as above
${var}bar # expand var, and append "bar" too
$varbar # same as ${varbar}, i.e expand a ...