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Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined
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How do I get the backtrace for all the threads in GDB?
...; -ex "thread apply all bt" -ex "detach" -ex "quit" > output.log, to avoid a question from gdb that blocks the command waiting for input.
– Mariano Paniga
Aug 12 at 12:52
a...
Is it okay to use now?
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How to add new line into txt file
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How to verify a user's password in Devise
...way of doing it:
user = User.find_by_email(params[:user][:email])
user.valid_password?(params[:user][:password])
The other method where you generate the digest from the user instance was giving me protected method errors.
...
Database sharding vs partitioning
...
Partitioning is more a generic term for dividing data across tables or databases. Sharding is one specific type of partitioning, part of what is called horizontal partitioning.
Here you replicate the schema across (typically) multiple instances or servers, using some...
Using Enum values as String literals
...stant, exactly as declared in its enum declaration.
Option Two: add overriding properties to your enums if you want more control
public enum Modes {
mode1 ("Fancy Mode 1"),
mode2 ("Fancy Mode 2"),
mode3 ("Fancy Mode 3");
private final String name;
private Modes(String...
How do I show a marker in Maps launched by geo URI Intent?
... your label has an ampersand (&) in it.
Looking at A Uniform Resource Identifier for Geographic Locations ('geo' URI):
Section 5.1 states:
if the final URI is to include a 'query' component, add the
component delimiter "?" to the end of the result, followed by the
encoded...
iOS - Dismiss keyboard when touching outside of UITextField
I'm wondering how to make the keyboard disappear when the user touches outside of a UITextField .
36 Answers
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What is a “Bitmap heap scan” in a query plan?
... (hence the so-called recheck cond you see in query plans).
Note, as an aside, how clustering/row order affects the associated costs with either method. If rows are all over the place in a random order, a bitmap index will be cheaper. (And, in fact, if they're really all over the place, a seq scan ...