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Why use apparently meaningless do-while and if-else statements in macros?
...f the semi-colon is absent.
But the real real good reason is that at some time, the macro's author will perhaps need to replace the macro with a genuine function (perhaps inlined). So the macro should really behave like one.
So we should have a macro needing semi-colon.
Produce a valid code
As s...
Find a value anywhere in a database
...p table for a table variable so you don't have to remember to drop it each time.
CREATE PROC SearchAllTables
(
@SearchStr nvarchar(100)
)
AS
BEGIN
-- Copyright © 2002 Narayana Vyas Kondreddi. All rights reserved.
-- Purpose: To search all columns of all tables for a given search string
-- Wri...
How to turn off caching on Firefox?
During development I have to "clear cache" in Firefox all the time in order to make it use the latest version of JavaScript files.
...
Does “untyped” also mean “dynamically typed” in the academic CS world?
...f values they compute.
He also remarks:
The word “static” is sometimes added explicitly--we speak of a
“statically typed programming language,” for example--to distinguish the
sorts of compile-time analyses we are considering here from the
dynamic or latent typing found in langu...
java: ArrayList - how can i check if an index exists?
... I'm going to start at index = 0 and my list.size() == 0 too. so the first time I check it will be true & I'll prep the list to do stuff. but the next time at that index, my index will still be index = 0 and now I am re-initializing that element in the list when I was supposed to be doing stuff....
What is lazy loading in Hibernate?
...ty will be loaded only when you actually accesses the entity for the first time.
The pattern is like this:
public Entity getEntity() {
if (entity == null) {
entity = loadEntity();
}
return entity;
}
This saves the cost of preloading/prefilling all the entities in a large data...
Using sed to mass rename files
... Note that link-only answers are discouraged (links tend to get stale over time). Please consider editing your answer and adding a synopsis here.
– kleopatra
Jun 23 '13 at 9:10
...
SQL DELETE with INNER JOIN
...in other tables, to do that you have to first linked your tables in design time.
CREATE TABLE IF NOT EXIST spawnlist (
npc_templateid VARCHAR(20) NOT NULL PRIMARY KEY
)ENGINE=InnoDB;
CREATE TABLE IF NOT EXIST npc (
idTemplate VARCHAR(20) NOT NULL,
FOREIGN KEY (idTemplate) REFERENCES spawnl...
How to convert std::string to LPCWSTR in C++ (Unicode)
...
(Found this question browsing randomly; it's been a long time since I did C++.) So the standard library doesn't have std::string -> std::wstring conversion? That seems weird; is there a good reason?
– Domenic
Jul 29 '09 at 8:41
...
Pandas groupby: How to get a union of strings
... {random}
dtype: object
Doing this on a whole frame, one group at a time. Key is to return a Series
def f(x):
return Series(dict(A = x['A'].sum(),
B = x['B'].sum(),
C = "{%s}" % ', '.join(x['C'])))
In [14]: df.groupby('A').apply(f)
Out[...