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How to get number of entries in a Lua table?
Sounds like a "let me google it for you" question, but somehow I can't find an answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
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How do I read any request header in PHP
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apache_request_headers()
<?php
$headers = apache_request_headers();
foreach ($headers as $header => $value) {
echo "$header: $value <br />\n";
}
ELSE: In any other case, you can use (userland implementation):
<?php
function getRequestHeaders() {
$headers = array();
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What does 'super' do in Python?
...lass, you want other classes to be able to use it. super() makes it easier for other classes to use the class you're writing.
As Bob Martin says, a good architecture allows you to postpone decision making as long as possible.
super() can enable that sort of architecture.
When another class subcla...
Catch an exception thrown by an async void method
Using the async CTP from Microsoft for .NET,
is it possible to catch an exception thrown by an async method in the calling method?
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How to use a dot “.” to access members of dictionary?
...rgs, **kwargs):
super(Map, self).__init__(*args, **kwargs)
for arg in args:
if isinstance(arg, dict):
for k, v in arg.iteritems():
self[k] = v
if kwargs:
for k, v in kwargs.iteritems():
self[k] = v
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How to do a less than or equal to filter in Django queryset?
...n or equal:
User.objects.filter(userprofile__level__gte=0)
Likewise, lt for less than and gt for greater than. You can find them all in the documentation.
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If table exists drop table then create it, if it does not exist just create it
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Just put DROP TABLE IF EXISTS `tablename`; before your CREATE TABLE statement.
That statement drops the table if it exists but will not throw an error if it does not.
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Where is the WPF Numeric UpDown control?
... are a lot of basic controls flat out missing. Specifically, I am looking for the Numeric UpDown control. Was there an out of band release that I missed? Really don't feel like writing my own control.
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Convert Base64 string to an image file? [duplicate]
...ta when the base64 function decodes it. Remove that data in the function before decoding the string, like so.
function base64_to_jpeg($base64_string, $output_file) {
// open the output file for writing
$ifp = fopen( $output_file, 'wb' );
// split the string on commas
// $data[ 0 ]...
Scala type programming resources
...e eval = X
}
As can be seen in the example, the object-oriented paradigm for type-level programming proceeds as follows:
First: define an abstract trait with various abstract type fields (see below for what an abstract field is). This is a template for guaranteeing that certain types fields exis...