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Is there any Rails function to check if a partial exists?
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Currently, I'm using the following in my Rails 3/3.1 projects:
lookup_context.find_all('posts/_form').any?
The advantage over other solutions I've seen is that this will look in all view paths instead of just your rails root. This is important to me as I have a lot of rails engines.
This a...
Are PHP include paths relative to the file or the calling code?
...f you want to make it matter, and do an include relative to B.php, use the __FILE__ constant (or __DIR__ since PHP 5.2 IIRC) which will always point to the literal current file that the line of code is located in.
include(dirname(__FILE__)."/C.PHP");
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How do I read / convert an InputStream into a String in Java?
...Utils)
String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
Using CharStreams (Guava)
String result = CharStreams.toString(new InputStreamReader(
inputStream, Charsets.UTF_8));
Using Scanner (JDK)
Scanner s = new Scanner(inputStream).useDelimiter("\\A");
String result...
What is the most robust way to force a UIView to redraw?
...r setNeedsDisplay];
[layer displayIfNeeded];
}
Also implement a draw(_: CALayer, in: CGContext) method that'll call your private/internal drawing method (which works since every UIView is a CALayerDelegate):
Swift
/// Called by our CALayer when it wants us to draw
/// (in compliance wit...
Move capture in lambda
...e following will be legal code in C++14:
using namespace std;
// a unique_ptr is move-only
auto u = make_unique<some_type>( some, parameters );
// move the unique_ptr into the lambda
go.run( [ u{move(u)} ] { do_something_with( u ); } );
But it is much more general in the sense that cap...
【解决】scrapyd启动job时报错：exceptions.TypeError: __init__() got an ...
【解决】scrapyd启动job时报错：exceptions.TypeError: __init__() got an unexpected keyword argument '_job'进入项目spiders目录, 修改 spider py 文件（你自己的spider的主文件）：def __init__(self):改为：def __init__(self, *args, **kwargs):最后不要忘了重新部署一...
Docker how to change repository name or rename image?
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Note that you probably want docker image tag from_server:version to_server:version as described here: docs.docker.com/engine/reference/commandline/image_tag
– Traveler
Mar 21 '19 at 0:49
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What encoding/code page is cmd.exe using?
...te static final String BOM = "\ufeff";
private static final String TEST_STRING
= "ASCII abcde xyz\n"
+ "German äöü ÄÖÜ ß\n"
+ "Polish ąęźżńł\n"
+ "Russian абвгдеж эюя\n"
+ "CJK 你好\n";
public static void mai...
I need to generate uuid for my rails application. What are the options(gems) I have? [duplicate]
...to be in Ruby 1.8.7. Looks like it was added in 1.9.3: apidock.com/ruby/v1_9_3_392/SecureRandom/uuid/class
– existentialmutt
Aug 25 '14 at 17:31
2
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How to print a groupby object
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Simply do:
grouped_df = df.groupby('A')
for key, item in grouped_df:
print(grouped_df.get_group(key), "\n\n")
This also works,
grouped_df = df.groupby('A')
gb = grouped_df.groups
for key, values in gb.iteritems():
print(df.ix[...