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How do you validate a URL with a regular expression in Python?
...+ '-.') # and others?
assert pieces.scheme in ['http', 'https', 'ftp'] # etc.
It might be slower, and maybe you'll miss conditions, but it seems (to me) a lot easier to read and debug than a regular expression for URLs.
...
Inheriting class methods from modules / mixins in Ruby
...ans that you can dynamically create new classes, assign them to variables, etc.:
klass = Class.new do
def foo
"foo"
end
end
#=> #<Class:0x2b613d0>
klass.new.foo
#=> "foo"
Also in Ruby, you have the possibility of defining so-called singleton methods on objects. These methods ...
Resumable downloads when using PHP to send the file?
...the specs you can do "bytes=x-y", "bytes=-x", "bytes=x-", "bytes=x-y,a-b", etc. so the bug in the previous version was the missing end slash, not the lack of a question mark.
– Theo
Jul 16 '09 at 8:09
...
Using a ListAdapter to fill a LinearLayout inside a ScrollView layout
...tAdapter adapter = ... // Your adapter.
final int adapterCount = adapter.getCount();
for (int i = 0; i < adapterCount; i++) {
View item = adapter.getView(i, null, null);
layout.addView(item);
}
EDIT: I rejected this approach when I needed to display about 200 non-trivial list items, it is...
Are there good reasons not to use an ORM? [closed]
... to know the framework instead of knowing the SqlConnection’s exceptions etc.
– hangy
Oct 11 '08 at 14:59
4
...
How to style a checkbox using CSS
... fundamental issue has not changed. You still can't apply styles (borders, etc.) directly to the checkbox element and have those styles affect the display of the HTML checkbox. What has changed, however, is that it's now possible to hide the actual checkbox and replace it with a styled element of yo...
Does PostgreSQL support “accent insensitive” collations?
...Security for client programs has been tightened with Postgres 10.3 / 9.6.8 etc. You need to schema-qualify function and dictionary name as demonstrated when used in any indexes. See:
'text search dictionary “unaccent” does not exist' entries in postgres log, supposedly during automatic analyze...
Timer function to provide time in nano seconds using C++
...u are measuring code involving sleep, mutex lock, condition_variable wait, etc, the rdtsc clock is likely to have inaccurate conversions to other units. It is a good idea to set your measurements up so that you can easily change and compare clocks (as shown in this answer).
– ...
std::function and std::bind: what are they, and when should they be used?
...tion is more generic to work with lambdas, context capture, member methods etc.
– Shital Shah
Sep 23 '19 at 8:09
bind(...
Is recursion ever faster than looping?
... of steps: a sequence of instructions: i.e.: do this first, do this after, etc. An imperative sequence of instructions. Even one line expressions are "an imperative sequence of instructions". If you have an expression with a specific "order of evaluation" then you have steps. It means than even a si...