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How to print register values in GDB?
...
Same problem: %eax is in the code, yet print $eax shows void.
– Ruslan Yushchenko
Oct 8 '12 at 16:42
5
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Callback after all asynchronous forEach callbacks are completed
...that gets updated in the callback. Depending on the value of the index parameter does not provide the same guarantee, because the order of return of the asynchronous operations is not guaranteed.
Using ES6 Promises
(a promise library can be used for older browsers):
Process all requests guarante...
Laravel Migration Change to Make a Column Nullable
...l 5 now supports changing a column; here's an example from the offical documentation:
Schema::table('users', function($table)
{
$table->string('name', 50)->nullable()->change();
});
Source: http://laravel.com/docs/5.0/schema#changing-columns
Laravel 4 does not support modifying colu...
check if jquery has been loaded, then load it if false
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Maybe something like this:
<script>
if(!window.jQuery)
{
var script = document.createElement('script');
script.type = "text/javascript";
script.src = "path/to/jQuery";
document.getElementsByTagName('head')[0].appen...
Why is “import *” bad?
It is recommended to not to use import * in Python.
12 Answers
12
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How to add a button to a PreferenceScreen?
I'm quite new to Android Development and just came across Preferences.
I found PreferenceScreen and wanted to create a login functionality with it. The only problem I have is that I don't know how I could add a "Login" button to the PreferenceScreen .
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
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Yes, MD5 is somewhat less CPU-intensive. On my Intel x86 (Core2 Quad Q6600, 2.4 GHz, using one core), I get this in 32-bit mode:
MD5 411
SHA-1 218
SHA-256 118
SHA-512 46
and this in 64-bit mode:
MD5 407
SHA-1 3...
SqlDataAdapter vs SqlDataReader
...ating back to the database
On the other hand, it:
Only has one record in memory at a time rather than an entire result set (this can be HUGE)
Is about as fast as you can get for that one iteration
Allows you start processing results sooner (once the first record is available). For some query types...
How to print time in format: 2009‐08‐10 18:17:54.811
What's the best method to print out time in C in the format 2009‐08‐10
18:17:54.811 ?
7 Answers
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Using “super” in C++
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Bjarne Stroustrup mentions in Design and Evolution of C++ that super as a keyword was considered by the ISO C++ Standards committee the first time C++ was standardized.
Dag Bruck proposed this extension, calling the base class "inherited." T...