大约有 47,000 项符合查询结果（耗时：0.0520秒） [XML]
Rails: select unique values from a column
..."models"."rating" FROM "models"
This has the advantages of not using sql strings and not instantiating models
share
|
improve this answer
|
follow
|
...
Calling a class function inside of __init__
...
Oops, sorry there should have been an extra layer of indenting under the "class MyClass():" line. I've fixed it above, but the question remains the same.
– PythonJin
Sep 28 '12 at 19:55
...
Left-pad printf with spaces
How can I pad a string with spaces on the left when using printf?
4 Answers
4
...
✔ Checkmark selected row in UITableViewCell
...}
where lastSelection is declared as var lastSelection: NSIndexPath!
No extra activity in cellForRowAtIndexPath needed. Shouldn't be hard to replicate in Obj-C.
share
|
improve this answer
...
What is the use of having destructor as private?
...you don't want to delete main class through the pointer to class that adds extra functionality to the main.
In the example below I don't want GuiWindow to be deleted through a HandlerHolder pointer.
class Handler
{
public:
virtual void onClose() = 0;
protected:
virtual ~Handler();
};
clas...
Is git good with binary files?
...whether the binary file changes are rare enough that you can live with the extra manual work they cause in the normal git workflow involving merges, rebases, cherrypicks.
share
|
improve this answer...
Favorite (Clever) Defensive Programming Best Practices [closed]
...
When printing out error messages with a string (particularly one which depends on user input), I always use single quotes ''. For example:
FILE *fp = fopen(filename, "r");
if(fp == NULL) {
fprintf(stderr, "ERROR: Could not open file %s\n", filename);
retu...
How to add anything in through jquery/javascript?
...
You can use innerHTML to just concat the extra field string;
document.head.innerHTML = document.head.innerHTML + '<link rel="stylesheet>...'
However, you can't guarantee that the extra things you add to the head will be recognised by the browser after the first load, a...
Generic htaccess redirect www to non-www
...NE,L]
Note that I used NE flag to prevent apache from escaping the query string. Without this flag, apache will change the requested URL http://www.example.com/?foo%20bar to http://www.example.com/?foo%2250bar
share
...
Difference between using bean id and name in Spring configuration file
...
Since Spring 3.1 the id attribute is an xsd:string and permits the same range of characters as the name attribute.
The only difference between an id and a name is that a name can contain multiple aliases separated by a comma, semicolon or whitespace, whereas an id mus...