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How to replace a hash key with another key
...dard method for it:
hash.transform_keys{ |key| key.to_s.upcase }
http://api.rubyonrails.org/classes/Hash.html#method-i-transform_keys
UPD: ruby 2.5 method
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What is the printf format specifier for bool?
...a printf conversion specifier for bool.
But the GNU C library provides an API for adding custom specifiers.
An example:
#include <stdio.h>
#include <printf.h>
#include <stdbool.h>
static int bool_arginfo(const struct printf_info *info, size_t n,
int *argtypes, int *size)
{
...
Returning a C string from a function
...rent methodologies to understand "my string".
If you ever use the Windows API (which is in C++), you'll see quite regularly function parameters like: "LPCSTR lpszName". The 'sz' part represents this notion of 'string-zero': an array of bytes with a null (/zero) terminator.
Clarification:
For the ...
Why does setTimeout() “break” for large millisecond delay values?
...
Check out the node doc on Timers here: https://nodejs.org/api/timers.html (assuming same across js as well since it's such an ubiquitous term now in event loop based
In short:
When delay is larger than 2147483647 or less than 1, the delay will be set to 1.
and delay is:
The n...
Get index of element as child relative to parent
...ssion that Delegate is just a more efficient variant of Live. This is from api.jquery.com/delegate: "Attach a handler to one or more events for all elements that match the selector, now or in the future, based on a specific set of root elements." It must be monitoring to bind in the future?
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Is there a naming convention for git repositories?
... words are hard to understand. I know, I'm German. "Donaudampfschifffahrtskapitänspatentausfüllungsassistentenausschreibungsstellenbewerbung."
"_" is harder to type than "-"
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What is the use of making constructor private in a class?
... This is what Sun did for the String class, and a reasonable chunk of the API that should not be extended.
– BobMcGee
Jan 15 '10 at 16:08
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How to highlight text using javascript
...n[i];
// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
if (cur.nodeType === Node.TEXT_NODE)
{
this.checkAndReplace(cur);
}
else if (cur.nodeType === Node.ELE...
Android: Storing username and password?
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With the new (Android 6.0) fingerprint hardware and API you can do it as in this github sample application.
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Conditional Variable vs Semaphore
...ary they are all district objects, all implemented using platform specific APIs. Certainly a semaphore will unblock the number of times signalled, condition variable might be be signalled multiple times but unblock only once. This is why the wair takes a mutex as a parameter.
–...