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What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
... followed by the
name of the variable in parentheses or braces: either $(foo) or
${foo} is a valid reference to the variable foo.
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Is a memory leak created if a MemoryStream in .NET is not closed?
... hiding means you may at some future point want to refactor:
MemoryStream foo()
{
MemoryStream ms = new MemoryStream();
// write stuff to ms
return ms;
}
to:
Stream foo()
{
...
}
This emphasizes that callers should not care what kind of Stream is being returned, ...
How do you reverse a string in place in JavaScript?
...r, there are some problems with this solution. For example:
naiveReverse('foo ???? bar');
// → 'rab �� oof'
// Where did the `????` symbol go? Whoops!
If you’re wondering why this happens, read up on JavaScript’s internal character encoding. (TL;DR: ???? is an astral symbol, and JavaScr...
Creating C formatted strings (not printing them)
...h>
#include <stdio.h>
// a function that accepts a string:
void foo( char* s);
// You'd like to call a function that takes a format string
// and then calls foo():
void foofmt( char* fmt, ...)
{
char buf[100]; // this should really be sized appropriately
...
CodeIgniter - accessing $config variable in view
...->item() works fine.
For example, if the config file contains $config['foo'] = 'bar'; then $this->config->item('foo') == 'bar'
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PHP json_encode encoding numbers as strings
...$arr["var"], "float") to fix it.
<?php
class testclass {
public $foo = 1;
public $bar = 2;
public $baz = "Hello, world";
}
$testarr = array( 'foo' => 1, 'bar' => 2, 'baz' => 'Hello, world');
$json_obj_txt = json_encode(new testclass());
$json_arr_txt = json_encode($testa...
Rails “validates_uniqueness_of” Case Sensitivity
...important):
Process A gets a request to create a new user with the name 'foo'
Process B does the same thing
Process A validates the uniqueness of 'foo' by asking the DB if that name exists yet and the DB says the name doesn't exist yet.
Process B does the same thing and gets the same response
Proc...
What is HEAD in Git?
...So if you did a git log and got something like commit ad0265... HEAD -> foo ... that would mean the foo branch is a reference to commit id ad0265. Doing a checkout of the text reference foo is not a detached head. Doing a checkout of the commit id ad0265 would result in a detached head. May be...
Testing Abstract Classes
...nd as an arbitrary answer: You have an abstract class 'A' having a common 'foo()' method. This 'foo()' method is being used overall all 'B', and 'C' classes, both derive from 'A'. Which class would you choose to test 'foo()'?
– user3790897
Aug 21 '17 at 14:28
...
Using NSPredicate to filter an NSArray based on NSDictionary keys
...ata = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"foo" forKey:@"BAR"]];
NSArray *filtered = [data filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(BAR == %@)", @"foo"]];
Filtered in this case contains the dictionary.
(the %@ does not have to be quoted,...