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Objective-C class -> string like: [NSArray className] -> @“NSArray”
...c. NSStringFromClass just pulls the name of the class from this struct and converts it to an NSString. Don't store the class name in a static NSString, it won't offer any performance advantage.
– dreamlax
Apr 10 '11 at 23:43
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How can I drop all the tables in a PostgreSQL database?
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You can write a query to generate a SQL script like this:
select 'drop table "' || tablename || '" cascade;' from pg_tables;
Or:
select 'drop table if exists "' || tablename || '" cascade;' from pg_tables;
In case some tables are automatically dropped due to cascade option in a...
How to show math equations in general github's markdown(not github's blog)
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this worked great. I had to convert a jupyter notebook (.ipynb) to .md and the equations were essentially multiline latex code.
– Marc Maxmeister
Jun 17 '19 at 18:21
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How to get the Full file path from URI
...but if i do it like the MediaStore Solution, it won't work if the app user selects eg Astro as browser, instead of Music Player. How do I solve this?
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Computed / calculated / virtual / derived columns in PostgreSQL
...y as column?
The expression (looking like a column) is not included in a SELECT * FROM tbl, though. You always have to list it explicitly.
Can also be supported with a matching expression index - provided the function is IMMUTABLE. Like:
CREATE FUNCTION col(tbl) ... AS ... -- your computed expr...
Should I use char** argv or char* argv[]?
...It will behave as a pointer, because as explained earlier an array will be converted to a pointer when its value is read. But it should not be confused with pointers.
One classic example is the following:
char c[10];
char **c = &c; // does not work.
typedef char array[10];
array *pc = &...
Selecting the first “n” items with jQuery
With Jquery, I need to select just the first "n" items from the page, for example the first 20 links instead of selecting all of them with the usual
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IntelliJ shortcut to show a popup of methods in a class that can be searched
... the list or highlight the desired element. Press Enter to navigate to the selected element.
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完美解决phpcms批量移动内容后，新闻心情、评论排行等不更新的问题 - 更多...
... if(!$_POST['tocatid']) showmessage(L('please_select_target_category'));
$tocatid = intval($_POST['tocatid']);
$modelid = $this->categorys[$tocatid]['modelid'];
if(!$modeli...
Dynamically adding properties to an ExpandoObject
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getting Error 53 Cannot convert type 'System.Dynamic.ExpandoObject' to 'System.Collections.Generic.IDictionary<string,string>' via a reference conversion, boxing conversion, unboxing conversion, wrapping conversion, or null type conversion
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