大约有 15,480 项符合查询结果（耗时：0.0390秒） [XML]
Passing variable arguments to another function that accepts a variable argument list
...emplates:
#include <stdio.h>
template<typename... Args> void test(const char * f, Args... args) {
printf(f, args...);
}
int main()
{
int a = 2;
test("%s\n", "test");
test("%s %d %d %p\n", "second test", 2, a, &a);
}
At the very least, it works with g++.
...
HTML5 Canvas vs. SVG vs. div
...t the benefits of each, but I will give some of the relevant results of my tests to consider for your specific application:
I made Canvas and HTML DIV test pages, both had movable "nodes." Canvas nodes were objects I created and kept track of in Javascript. HTML nodes were movable Divs.
I added 10...
Get selected value in dropdown list using JavaScript
... looks like this:
<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2" selected="selected">test2</option>
<option value="3">test3</option>
</select>
Running this code:
var e = document.getElementById("ddlViewBy");
var st...
MySQL Insert into multiple tables? (Database normalization?)
...use transactions.
BEGIN;
INSERT INTO users (username, password)
VALUES('test', 'test');
INSERT INTO profiles (userid, bio, homepage)
VALUES(LAST_INSERT_ID(),'Hello world!', 'http://www.stackoverflow.com');
COMMIT;
Have a look at LAST_INSERT_ID() to reuse autoincrement values.
Edit: you said...
How is Docker different from a virtual machine?
...his with other tools, but not nearly as easily or fast.
This is great for testing; let's say you have thousands of tests that need to connect to a database, and each test needs a pristine copy of the database and will make changes to the data. The classic approach to this is to reset the database a...
Is there a CSS selector by class prefix?
...if any): in this case - "wildcard" indicates you're looking for ANY match.
test- : the value (assuming there is one) of the attribute - that contains the string "test-" (which could be anything)
So, for example:
[class*='test-'] {
color: red;
}
You could be more specific if you have good reas...
Mocking python function based on input arguments
...dule my_module.py uses pandas to read from a database and we would like to test this module by mocking pd.read_sql_table method (which takes table_name as argument).
What you can do is to create (inside your test) a db_mock method that returns different objects depending on the argument provided:
...
Use images instead of radio buttons
... outline: 2px solid #f00;
}
<label>
<input type="radio" name="test" value="small" checked>
<img src="http://placehold.it/40x60/0bf/fff&text=A">
</label>
<label>
<input type="radio" name="test" value="big">
<img src="http://placehold.it/40x60/b0f/...
Post-increment and pre-increment within a 'for' loop produce same output [duplicate]
...atter in a for loop is that the flow of control works roughly like this:
test the condition
if it is false, terminate
if it is true, execute the body
execute the incrementation step
Because (1) and (4) are decoupled, either pre- or post-increment can be used.
...
Ruby regular expression using variable name
...
The code you think doesn't work, does:
var = "Value"
str = "a test Value"
p str.gsub( /#{var}/, 'foo' ) # => "a test foo"
Things get more interesting if var can contain regular expression meta-characters. If it does and you want those matacharacters to do what they usually do in...