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“Cloning” row or column vectors
...= 1000
>>> x = np.arange(n)
>>> reps = 10000
Zero-cost allocations
A view does not take any additional memory. Thus, these declarations are instantaneous:
# New axis
x[np.newaxis, ...]
# Broadcast to specific shape
np.broadcast_to(x, (reps, n))
Forced allocation
If you want...
How can I make a clickable link in an NSAttributedString?
...tedString.
NSMutableAttributedString * str = [[NSMutableAttributedString alloc] initWithString:@"Google"];
[str addAttribute: NSLinkAttributeName value: @"http://www.google.com" range: NSMakeRange(0, str.length)];
yourTextView.attributedText = str;
Edit:
This is not directly about the question ...
Is it possible to use global variables in Rust?
...
It's possible but no heap allocation allowed directly. Heap allocation is performed at runtime. Here are a few examples:
static SOME_INT: i32 = 5;
static SOME_STR: &'static str = "A static string";
static SOME_STRUCT: MyStruct = MyStruct {
nu...
Explain the concept of a stack frame in a nutshell
...rocessor knows anything about stack, because WE manipulate it via subbing (allocation), pushing and popping. And so here are calling conventions which explain how we should use the stack.
– Victor Polevoy
Apr 18 '18 at 7:18
...
String concatenation: concat() vs “+” operator
...then throwing it away when you create the final String. In practice memory allocation is surprisingly fast.
Update: As Pawel Adamski notes, performance has changed in more recent HotSpot. javac still produces exactly the same code, but the bytecode compiler cheats. Simple testing entirely fails bec...
Shards and replicas in Elasticsearch
...search performance and for fail-over. A replica shard is never going to be allocated on the same node where the related primary is (it would pretty much be like putting a backup on the same disk as the original data).
Back to our example, with 1 replica we'll have the whole index on each node, sinc...
mongod, mac os x - rlimits warning [closed]
...
'rlimit' is related with amount of memory allocated to process. Its os thing. In this case memory allocated to mongod process. So mongodb complaining you that memory allocated is low & it might be slow. I guess thats ok on development machine. But if you reading ...
Load local JSON file into variable
...mport isn't working in Chrome v72 - still Uncaught SyntaxError: Unexpected token *
– 1000Gbps
Feb 15 '19 at 23:01
...
What does the “__block” keyword mean?
...and static.[testme] Variables qualified by __block act as if they were in allocated storage and this storage is automatically recovered after last use of said variable. An implementation may choose an optimization where the storage is initially automatic and only "moved" to allocated (heap) storag...
Determine the number of lines within a text file
...ne loads the entire contents of the file into an array which means it must allocate at least as much memory as the size of the file. The second merely loops one line at a time so it never has to allocate more than one line's worth of memory at a time. This isn't that important for small files, but f...