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How can bcrypt have built-in salts?
...he password using the salt and cost factor. Use it to encrypt a well-known string. Store the cost, salt, and cipher text. Because these three elements have a known length, it's easy to concatenate them and store them in a single field, yet be able to split them apart later.
When someone tries to au...
Generate a UUID on iOS from Swift
In my iOS Swift app I want to generate random UUID ( GUID ) strings for use as a table key, and this snippet appears to work:
...
What is the purpose of the reader monad?
...lculus has a syntax that looks like
data Term = Apply Term Term | Lambda String Term | Var Term deriving (Show)
and we want to write an evaluator for this language. To do so, we will need to keep track of an environment, which is a list of bindings associated with terms (actually it will be clos...
How to convert a Drawable to a Bitmap?
...rawable.icon_resource);
Here a version where the image gets downloaded.
String name = c.getString(str_url);
URL url_value = new URL(name);
ImageView profile = (ImageView)v.findViewById(R.id.vdo_icon);
if (profile != null) {
Bitmap mIcon1 =
BitmapFactory.decodeStream(url_value.openConn...
Which regular expression operator means 'Don't' match this character?
...mer: don't match a, b, c or 0: [^a-c0]
The latter: match any three-letter string except foo and bar:
(?!foo|bar).{3}
or
.{3}(?<!foo|bar)
Also, a correction for you: *, ? and + do not actually match anything. They are repetition operators, and always follow a matching operator. Thus, a+ means...
Dynamic constant assignment
...ed, as it makes the constant non-constant; even though the contents of the string are the same (for the moment, anyhow), the actual string object itself is different each time the method is called. For example:
def foo
p "bar".object_id
end
foo #=> 15779172
foo #=> 15779112
Perhaps if yo...
How can I programmatically get the MAC address of an iphone
... to use it
InitAddresses();
GetIPAddresses();
GetHWAddresses();
int i;
NSString *deviceIP = nil;
for (i=0; i<MAXADDRS; ++i)
{
static unsigned long localHost = 0x7F000001; // 127.0.0.1
unsigned long theAddr;
theAddr = ip_addrs[i];
if (theAddr == 0) break;
if (theAddr...
How can I use Guzzle to send a POST request in JSON?
...n Guzzle 6, you can do it like this: $client->post($url, ['body' => $string, 'headers' => ['Content-type' => 'application/json']]);
– marcovtwout
Apr 13 '17 at 6:41
...
jQuery / Javascript - How do I convert a pixel value (20px) to a number value (20)
I know jQuery has a helper method for parsing unit strings into numbers. What is the jQuery method to do this?
6 Answers
...
Use JavaScript to place cursor at end of text in text input element
...spaces. For this you can use a huge number that should be larger than your string.
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