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Regular cast vs. static_cast vs. dynamic_cast [duplicate]
I've been writing C and C++ code for almost twenty years, but there's one aspect of these languages that I've never really understood. I've obviously used regular casts i.e.
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Java synchronized method lock on object, or method?
...object would block each other anyway.
If you want to synchronize only on one variable at a time, so two threads won't block each other while accessing different variables, you have synchronize on them separately in synchronized () blocks. If a and b were object references you would use:
public vo...
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
... AtomicX classes
Initialize the value into a final field (JLS 17.5).
The ones most interesting for your scenario are (2), (3) and (4). In particular, (3) applies directly to the code I have above: if you transform the declaration of MAP to:
public static volatile HashMap<Object, Object> MAP...
how to listen to N channels? (dynamic select statement)
...he list of cases. Like
the Go select statement, it blocks until at least one of the cases can
proceed, makes a uniform pseudo-random choice, and then executes that
case. It returns the index of the chosen case and, if that case was a
receive operation, the value received and a boolean indica...
How to delete large data of table in SQL without log?
...able with same schema and import these rows back into this ex-Large table.
One last option I can think of is to change your database's Recovery Mode to SIMPLE and then delete rows in smaller batches using a while loop something like this..
DECLARE @Deleted_Rows INT;
SET @Deleted_Rows = 1;
WHILE (...
nginx - client_max_body_size has no effect
...stions from nembleton & rjha94)
I thought it might be helpful for someone, if I added a little clarification to their suggestions. For starters, please be certain you have included your increased upload directive in ALL THREE separate definition blocks (server, location & http). Each shou...
I want to copy table contained from one database and insert onto another database table
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If you want to copy a table from one Database to another database , You can simply do as below.
CREATE TABLE db2.table LIKE db1.table;
INSERT INTO db2.table SELECT * FROM db1.table;
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Define all functions in one .R file, call them from another .R file. How, if possible?
...ions are changing a lot since you are converting the code, put them all in one file and just source the whole thing every time. You could also have a separate smaller file that 1. sources the larger collection of functions and 2. Runs your test cases. In R there are lots of ways to arrange your wo...
Difference between .on('click') vs .click()
... a single handler for all elements that match your selector, including the ones created dynamically.
...another reason to use .on
As Adrien commented below, another reason to use .on is namespaced events.
If you add a handler with .on("click", handler) you normally remove it with .off("click",...
When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
...en DFS and BFS, but I'm interested to know when it's more practical to use one over the other?
16 Answers
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