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Fast way to discover the row count of a table in PostgreSQL
...s. You can use a subquery with LIMIT:
SELECT count(*) FROM (SELECT 1 FROM token LIMIT 500000) t;
Postgres actually stops counting beyond the given limit, you get an exact and current count for up to n rows (500000 in the example), and n otherwise. Not nearly as fast as the estimate in pg_class, t...
PHP编译安装时常见错误解决办法，php编译常见错误 - 更多技术 - 清泛网 - ...
PHP编译安装时常见错误解决办法，php编译常见错误PHP编译安装时常见错误解决办法，php编译常见错误This article is post on https: coderwall.com p ggmpfaconfigure: error: xslt-...PHP编译安装时常见错误解决办法，php编译常见错误
This article is po...
PHP page redirect [duplicate]
Can PHP make a redirect call after executing a function? I am creating a function on the completion of which I want it to redirect to a file located in the same root folder. Can it be done?
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Programmatically set the initial view controller using Storyboards
...ngWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *viewController = // determine the initial view controlle...
Convert number to month name in PHP
I have this PHP code:
26 Answers
26
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When to use -retainCount?
...meaningless.
If you're trying to track down why an object isn't getting deallocated, use the Leaks tool in Instruments. If you're trying to track down why an object was deallocated too soon, use the Zombies tool in Instruments.
But don't use -retainCount. It's a truly worthless method.
edit
Pl...
New Line on PHP CLI
I have a php CLI script and cannot get the output to break on new lines. I do
4 Answers
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Anonymous recursive PHP functions
Is it possible to have a PHP function that is both recursive and anonymous? This is my attempt to get it to work, but it doesn't pass in the function name.
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PHP array_filter with arguments
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I am not a php savy, so maybe this is an obvious question, but how can you pass in an array to array_filter and still make it work? the documentation never talks about this, except for someone's comment.
– Nicola P...
Why can't I access DateTime->date in PHP's DateTime class?
...ilable is actually a side-effect of support for var_dump() here – derick@php.net
For some reason, you're not supposed to be able to access the property but var_dump shows it anyways. If you really want to get the date in that format, use the DateTime::format() function.
echo $mydate->format(...