大约有 13,922 项符合查询结果（耗时：0.0214秒） [XML]
Fastest method to replace all instances of a character in a string [duplicate]
...g/character in a string in JavaScript? A while , a for -loop, a regular expression?
14 Answers
...
How do I determine the size of my array in C?
...
Executive summary:
int a[17];
size_t n = sizeof(a)/sizeof(a[0]);
Full answer:
To determine the size of your array in bytes, you can use the sizeof
operator:
int a[17];
size_t n = sizeof(a);
On my computer, ints are 4 ...
How can a LEFT OUTER JOIN return more records than exist in the left table?
... was at least one record in the right table but thank you so much for the explanation.
– Jay Wilde
Sep 6 '18 at 17:43
add a comment
|
...
Is there a way to access method arguments in Ruby?
...me of the parameter and whether it is required.
e.g.
If you do
def foo(x, y)
end
then
method(:foo).parameters # => [[:req, :x], [:req, :y]]
You can use the special variable __method__ to get the name of the current method. So within a method the names of its parameters can be obtained vi...
What is the purpose of the word 'self'?
...rs to the specific object created from that class, but I can't see why it explicitly needs to be added to every function as a parameter. To illustrate, in Ruby I can do this:
...
Line-breaking widget layout for Android
...aining the words. As space required for all 'words' in a 'sentence' would exceed the available horizontal space on the display, I would like to wrap these 'sentences' as you would a normal piece of text.
...
Why not use exceptions as regular flow of control?
To avoid all standard-answers I could have Googled on, I will provide an example you all can attack at will.
24 Answers
...
REST APIs: custom HTTP headers vs URL parameters
...up is in a system to system request operating on behalf of a user. The proxy system will validate the user and add "X-User: userid" to the headers and use the system credentials to hit the endpoint. The receiving system validates that the system credentials are authorized to act on behalf of the u...
How to debug Lock wait timeout exceeded on MySQL?
... see the affected table(s)
You get all kinds of additional Locking and Mutex Information.
Here is a sample from one of my clients:
mysql> show engine innodb status\G
*************************** 1. row ***************************
Type: InnoDB
Name:
Status:
=====================================...
How does “do something OR DIE()” work in PHP?
...then the entire statement must be true therefore the second part is never executed.
For example:
$x = 5;
true or $x++;
echo $x; // 5
false or $x++;
echo $x; // 6
Therefore, if your query is unsuccessful, it will evaluate the die() statement and end the script.
...