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How do you validate a URL with a regular expression in Python?
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For example ::::: is a valid URL. The path is ":::::". A pretty stupid filename, but a valid filename.
Also, ///// is a valid URL. The netloc ("hostname") is "". The path is "///". Again, stupid. Also valid. This URL normalizes to "///" which is the equivalent.
Something like "bad://///wo...
javascript function leading bang ! syntax
...inated due to the following parenthesis.
Also in concatenated javascript files you don't have to worry if the preceding code has missing semicolons. So no need for the common ;(function(){})(); to make sure your own won't break.
I know my answer is kind of late but i think it haven't been mention...
Spark java.lang.OutOfMemoryError: Java heap space
...iver memory can't be larger than the input size. Consider you have a 160gb file to be loaded into your cluster. so, for that, you would create a driver with 161 GB? that's not feasible. Its how you determine the number of executors, their memory, and the buffer for overhead memory and their OS. You ...
Using NumberPicker Widget with Strings
...eate(savedInstanceState);
setContentView(R.layout.your_activity_layout_file);
picker = (NumberPicker) findViewById(R.id.pickerId_From_your_Layout_file);
picker.setMinValue(0);
picker.setMaxValue(3);
picker.setDisplayedValues(new String[]{"English", "French","Kiswahili","عرب...
What is Node.js' Connect, Express and “middleware”?
...t's meant by "middleware": Out of the box, none of the above serves static files for you. But just throw in connect.static (a middleware that comes with Connect), configured to point to a directory, and your server will provide access to the files in that directory. Note that Express provides Connec...
How do I enable standard copy paste for a TextView in Android?
.../paste for TextView, U can choose one of the following:
Change in layout file: add below property to your TextView
android:textIsSelectable="true"
In your Java class write this line to set it programmatically. myTextView.setTextIsSelectable(true);
And long press on the TextView you can see co...
jQuery selector regular expressions
... @padolsey works great. Here's an example where you can iterate over text, file and checkbox input fields or textareas with it: $j('input:regex(type, text|file|checkbox),textarea').each(function(index){ // ... });
– Matt Setter
Jan 6 '12 at 11:41
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What does rake db:test:prepare actually do?
...tions and,
load the test schema
That is, it will look your db/schema.rb file to determine if any migrations that exist in your project that have not been run. Assuming there are no outstanding migrations, it will then empty the database and reload it based on the contents of the db/schema.rb file...
Simple logical operators in Bash
...t on operators such as -n $variable to test if a variable is empty and -e $file to test if a file exists. There are also string equality operators: "$string1" == "$string2" (beware that the right-hand side is a pattern, e.g. [[ $foo == a* ]] tests if $foo starts with a while [[ $foo == "a*" ]] tests...
Remove a fixed prefix/suffix from a string in Bash
...aths, I couldn't use /, so I used sed "s#^$prefix##, instead. (Fragility: filenames can't contain #. Since I control the files, we're safe, there.)
– Olie
Oct 21 '14 at 21:24
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