The number that follows the associativity information describes in what order the operators are applied. It must always be between 0 and 9 inclusive. This is commonly referred to as how tightly the operator binds. For example, consider the following fixity declarations (in base)
infixl 6 +
infixl ...
In Sinatra, routing is how your app responds to requests, by the path of the request (e.g. /welcome) and by the HTTP verb used (e.g. GET or POST). The way a request is written is as follows:
<http-verb> <path> do
<code block to execute when this route is requested>
end
He...
When matching the path of a route, you can do it explicitly, matching only one path, like so:
get "/hello" do
return "Hello!"
end
You can also use a regular expression to match complex routes. Any route which matches the regular expression will run that code block. If m...
To print a test field (TestField) from a test feature class (TestFC) in a test file geodatabase (Test.gdb) located in a temporary folder (C:\Temp):
with arcpy.da.SearchCursor(r"C:\Temp\Test.gdb\TestFC",["TestField"]) as cursor:
for row in cursor:
print row[0]
from django.db import models
from django.contrib.auth.models import User
from django.db.models.signals import post_save
from django.dispatch import receiver
class UserProfile(models.Model):
user = models.OneToOneField(User, related_name='user')
website = models.URLField(default='', ...
If an arithmetic operation that yields a floating point type produces a value that is not in the range of representable values of the result type, the behavior is undefined according to the C++ standard, but may be defined by other standards the machine might conform to, such as IEEE 754.
float x =...
When either a signed or unsigned integer is converted to a signed integer type, and its value is not representable in the destination type, the value produced is implementation-defined. Example:
// Suppose that on this implementation, the range of signed char is -128 to +127 and
// the range of un...
Here is a simple JsonArray which you would like to convert to a Java ArrayList:
{
"list": [
"Test_String_1",
"Test_String_2"
]
}
Now pass the JsonArray 'list' to the following method which returns a corresponding...
Sometimes in a development or testing environment, the SSL certificate chain might not have been fully established (yet).
To continue developing and testing, you can turn off SSL verification programmatically by installing an "all-trusting" trust manager:
try {
// Create a trust mana...
Config values can be set in three ways:
Via private static variables on any class within a SilverStripe project
Via yaml config files (stored in module-folder/_config/[file].yml)
Via PHP at run time (Config::inst()->update('Director', 'environment_type', 'dev')
Generally it's best to se...
Emacs uses the terms point, mark, and region to provide more precision about the selected text and position of the cursor. By understanding these terms, it'll help you understand and use other operations and functions.
The point is the place in a buffer where editing (i.e. insertion) is currently t...
Killing and yanking more or less correspond to what is usually called "cutting" and "pasting".
Killing
killing means deleting text, and copying it to the kill-ring (which could be seen as a sort of "clipboard" in the "cut & paste" terminology). The kill ...
The ToString() method is present on all reference object types. This is due to all reference types being derived from Object which has the ToString() method on it. The ToString() method on the object base class returns the type name. The fragment below will print out "User" to the console....
GetHashCode has major performance effects on Dictionary<> and HashTable.
Good GetHashCode Methods
should have an even distribution
every integer should have a roughly equal chance of returning for a random instance
if your method returns the same integer (e.g. the constant '999') for e...
Setters and Getters allow for an object to contain private variables which can be accessed and changed with restrictions. For example,
public class Person {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
i...
<ImageView
android:id="@+id/imgExample"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
...
/>
set a drawable as content of ImageView using XML attribute:
android:src="@drawable/android2"
set a drawable program...
If you want to show local notification immediately, you should call:
Swift 3
UIApplication.shared.presentLocalNotificationNow(notification)
Swift 2
UIApplication.sharedApplication().presentLocalNotificationNow(notification)
Objective-C
[[UIApplication sharedApplication] presentLocalNotific...
