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Get type of all variables
...te: character
typeof(5 && 4) #doubles are coerced by order of && logical
typeof(8 < 'foobar') #string and double is coerced logical
typeof(list(4, T)[[1]]) #a list retains type at every index: double
typeof(list(4, T)[[2]]) #a list retains type at...
What is RSS and VSZ in Linux memory management
...79087] mongod invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
So we see that interestingly it was the MongoDB daemon that always runs in my laptop on the background that first triggered the OOM killer, presumably when the poor thing was trying to allocate some...
How do function pointers in C work?
... preparing the instance of the String, the newString function is called in order to set up the function pointers to their respective functions:
String newString()
{
String self = (String)malloc(sizeof(struct String_Struct));
self->get = &getString;
self->set = &setString;...
Logging best practices [closed]
...You need at least to set the ActivityId once for each logical operation in order to correlate.
Start/Stop and the LogicalOperationStack can then be used for simple stack-based context. For more complex contexts (e.g. asynchronous operations), using TraceTransfer to the new ActivityId (before changi...
How to model type-safe enum types?
...s of limited utility in practice (you might as well use case objects).
In order to get something most closely resembling a Java Enum (i.e. with sensible toString and valueOf methods -- perhaps you are persisting the enum values to a database) you need to modify it a bit. If you had used skaffman's...
Why does calling a method in my derived class call the base class method?
...ethod virtual and you have to override the function in the child class, in order to call the method of class object you put in parent class reference.
public class Person
{
public virtual void ShowInfo()
{
Console.WriteLine("I am Person");
}
}
public class Teacher : Person
{
...
Chrome Extension how to send data from content script to popup.html
...ution (although not very close to optimal):
In manifest.json: Change the order of the content scripts, putting jquery first. According to the relevant docs:
"js" [...] The list of JavaScript files to be injected into matching pages. These are injected in the order they appear in this array.
...
What are the best PHP input sanitizing functions?
...tions to make your data a bit safer. That's fine. Your mistake is in the order of operations, and how and where to use these functions.
It's important to understand the difference between sanitizing and validating user data, escaping data for storage, and escaping data for presentation.
Sanitizing...
How do you use the ellipsis slicing syntax in Python?
... a = arange(16).reshape(2,2,2,2)
Now, you have a 4-dimensional matrix of order 2x2x2x2. To select all first elements in the 4th dimension, you can use the ellipsis notation
>>> a[..., 0].flatten()
array([ 0, 2, 4, 6, 8, 10, 12, 14])
which is equivalent to
>>> a[:,:,:,0].f...
How do I prevent an Android device from going to sleep programmatically?
... need to be sure you have the WAKE_LOCK permission set in your manifest in order to use this method.
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