大约有 40,000 项符合查询结果（耗时：0.0683秒） [XML]
When should I use double or single quotes in JavaScript?
...
@Cerebrus - I think flexibility is OK with this one. Sure pick a preferred style, but if you need to break away from the style to save escaping lots of quotes in one string. I'd be OK with that.
– Martin Clarke
May 2 '09 at 8:11
...
Split string into an array in Bash
...e over the elements:
for element in "${array[@]}"
do
echo "$element"
done
To get both the index and the value:
for index in "${!array[@]}"
do
echo "$index ${array[index]}"
done
The last example is useful because Bash arrays are sparse. In other words, you can delete an element or add a...
Class with single method — best approach?
...erforming the function, it can be destroyed. Is there any reason to prefer one of these approaches?
15 Answers
...
send mail from linux terminal in one line [closed]
...linux to send emails via command line. How can I send an simple email with one line from the terminal though?
7 Answers
...
How do the Proxy, Decorator, Adapter, and Bridge Patterns differ?
...ions.
Facade is a higher-level (read: simpler) interface to a subsystem of one or more classes. Suppose you have a complex concept that requires multiple objects to represent. Making changes to that set of objects is confusing, because you don't always know which object has the method you need to ca...
What is the difference between parseInt(string) and Number(string) in JavaScript? [duplicate]
...kes it useful when you need a numeric value at the front "in case there is one" (note that parseInt("hui") also returns NaN). And the biggest difference is the use of radix that Number() doesn't know of and parseInt() may indirectly guess from the given string (that can cause weird results sometimes...
How does the main() method work in C?
...ultiple signatures for main, as well as variable-length argument lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling functi...
LINQ's Distinct() on a particular property
...the question). What I if want to use Distinct on a list of an Object on one or more properties of the object?
20 Answ...
What does the exclamation mark do before the function?
... it turns it into an expression. It is now a function expression.
The ! alone doesn't invoke the function, of course, but we can now put () at the end: !function foo() {}() which has higher precedence than ! and instantly calls the function.
So what the author is doing is saving a byte per functio...
How to extract one column of a csv file
...
The simplest way I was able to get this done was to just use csvtool. I had other use cases as well to use csvtool and it can handle the quotes or delimiters appropriately if they appear within the column data itself.
csvtool format '%(2)\n' input.csv
Replacing 2...