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Is there any overhead to declaring a variable within a loop? (C++)
...
main(){ int var; while(int i < 100) { var = 4; } }
gcc -S 1.c
1.s:
_main:
pushl %ebp
movl %esp, %ebp
subl $24, %esp
movl $0, -16(%ebp)
jmp L2
L3:
movl $4, -12(%ebp)
L2:
cmpl $99, -16(%ebp)
jle L3
leave
ret
2.c
main() { while(int i &...
Customizing the template within a Directive
...this within a directive's link property: $compile(htmlText)(scope,function(_el){ element.replaceWith(_el); }); in order for the form's controller to recognize its newly formed existence and include it in validation. I could not get it to work in a directive's compile property.
...
How to use UIVisualEffectView to Blur Image?
...
-(void) addBlurEffectOverImageView:(UIImageView *) _imageView
{
UIVisualEffect *blurEffect;
blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView *visualEffectView;
visualEffectView = [[UIVisualEffectView alloc] initWithEffect:...
How can I list all foreign keys referencing a given table in SQL Server?
...
Not sure why no one suggested but I use sp_fkeys to query foreign keys for a given table:
EXEC sp_fkeys 'TableName'
You can also specify the schema:
EXEC sp_fkeys @pktable_name = 'TableName', @pktable_owner = 'dbo'
Without specifying the schema, the docs state ...
Compelling examples of custom C++ allocators?
...nging a single
std::vector<T>
to
std::vector<T,tbb::scalable_allocator<T> >
(this is a quick and convenient way of switching the allocator to use TBB's nifty thread-private heaps; see page 7 in this document)
...
PostgreSQL create table if not exists
...ns, here is a function to work around it:
CREATE OR REPLACE FUNCTION create_mytable()
RETURNS void
LANGUAGE plpgsql AS
$func$
BEGIN
IF EXISTS (SELECT FROM pg_catalog.pg_tables
WHERE schemaname = 'myschema'
AND tablename = 'mytable') THEN
RAISE NOTICE 'T...
A fast method to round a double to a 32-bit int explained
...
For those who'd like to convert to int64_t you can do that by shifting the mantissa left and then right by 13 bits. This will clear the exponent and the two bits from the 'magic' number, but will keep and propagate the sign to the entire 64-bit signed integer. unio...
How to use the 'main' parameter in package.json?
...r example multiple CLI commands (during development accessible under ./node_modules/.bin/<symlink>) check out the "bin" parameter.
– Frank Nocke
Oct 9 '18 at 13:09
...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...ameOldTableToNewTable < ActiveRecord::Migration
def self.up
rename_table :old_table_name, :new_table_name
end
def self.down
rename_table :new_table_name, :old_table_name
end
end
I had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveReco...
Given final block not properly padded
...here:
http://www.rsa.com/products/bsafe/documentation/cryptoj35html/doc/dev_guide/group_CJ_SYM__PAD.html
(I assume you have the issue when you try to encrypt)
You can choose your padding schema when you instantiate the Cipher object. Supported values depend on the security provider you are using. ...