大约有 38,000 项符合查询结果（耗时：0.0523秒） [XML]
Safe (bounds-checked) array lookup in Swift, through optional bindings?
...h, for example, don't have indices in the middle, solution with indices is more general one.
– zubko
Jun 20 '19 at 21:22
|
show 15 more comm...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
...en null is used inappropriately. In contrast, the IAE JavaDoc couldn't be more clear: "Thrown to indicate that a method has been passed an illegal or inappropriate argument." Yup, that's you!
Second, when you see an NPE in a stack trace, what do you assume? Probably that someone dereferenced a n...
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
...
|
show 4 more comments
177
...
Express-js wildcard routing to cover everything under and including a path
... the connect router the * in a path is replaced with .+ so will match 1 or more characters.
https://github.com/senchalabs/connect/blob/master/lib/middleware/router.js
If you have 2 routes that perform the same action you can do the following to keep it DRY.
var express = require("express"),
a...
Get current batchfile directory
... the %0 variable is expanded, the result is enclosed in quotation marks.
More on batch parameters.
share
|
improve this answer
|
follow
|
...
Most common C# bitwise operations on enums
...
I did some more work on these extensions - You can find the code here
I wrote some extension methods that extend System.Enum that I use often... I'm not claiming that they are bulletproof, but they have helped... Comments removed...
n...
Declaring variables inside loops, good practice or bad practice?
...lsewhere.
Last but not least, some dedicated optimization can be performed more efficiently by the compiler (most importantly register allocation), since it knows that the variable cannot be used outside of the loop. For example, no need to store the result for later re-use.
In short, you are righ...
How to add -Xlint:unchecked to my Android Gradle based project?
...
|
show 2 more comments
55
...
What does -> mean in Python function definitions?
...
It's a function annotation.
In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attach metadata to functions describi...
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
...MySQL 5.7+ please see answer from @Lahiru to this question. That contains more current information.
For MySQL < 5.7:
The default root password is blank (i.e. empty string) not root. So you can just login as:
mysql -u root
You should obviously change your root password after installation
my...