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What is the use of the @ symbol in PHP?
... messages that might be generated by that expression will be ignored.
If you have set a custom error handler function with set_error_handler() then it will still get called, but this custom error handler can (and should) call error_reporting() which will return 0 when the call that triggered th...
How to remove a key from Hash and get the remaining hash in Ruby/Rails?
...as an except/except! method that returns the hash with those keys removed. If you're already using Rails, there's no sense in creating your own version of this.
class Hash
# Returns a hash that includes everything but the given keys.
# hash = { a: true, b: false, c: nil}
# hash.except(:c...
SQL Server add auto increment primary key to existing table
...TABLE dbo.YourTable
ADD CONSTRAINT PK_YourTable
PRIMARY KEY(ID)
or if you prefer to do all in one step:
ALTER TABLE dbo.YourTable
ADD ID INT IDENTITY
CONSTRAINT PK_YourTable PRIMARY KEY CLUSTERED
share
...
How should I handle “No internet connection” with Retrofit on Android
...
public Response execute(Request request) throws IOException {
if (!ncm.isConnected()) {
log.debug("No connectivity %s ", request);
throw new NoConnectivityException("No connectivity");
}
return wrappedClient.execute(request);
}
}
and then us...
How to remove all characters after a specific character in python?
...p = '...'
rest = text.split(sep, 1)[0]
You didn't say what should happen if the separator isn't present. Both this and Alex's solution will return the entire string in that case.
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|
improve ...
Find value in an array
...
I'm guessing that you're trying to find if a certain value exists inside the array, and if that's the case, you can use Array#include?(value):
a = [1,2,3,4,5]
a.include?(3) # => true
a.include?(9) # => false
If you mean something else, check the Ruby A...
Restricting input to textbox: allowing only numbers and decimal point
... var charCode = (evt.which) ? evt.which : evt.keyCode;
if (charCode != 46 && charCode > 31
&& (charCode < 48 || charCode > 57))
return false;
return true;
}
//-->
</SCRIPT>
</HEA...
How to use a variable inside a regular expression?
...nterpolation, "f-strings". In your particular case the solution would be:
if re.search(rf"\b(?=\w){TEXTO}\b(?!\w)", subject, re.IGNORECASE):
...do something
EDIT:
Since there have been some questions in the comment on how to deal with special characters I'd like to extend my answer:
raw str...
How do you calculate log base 2 in Java for integers?
...
If you are thinking about using floating-point to help with integer arithmetics, you have to be careful.
I usually try to avoid FP calculations whenever possible.
Floating-point operations are not exact. You can never know ...
Listing all permutations of a string/integer
...ents, concatenated with every permutation of the other elements.
Example:
If the set just has one element -->
return it.
perm(a) -> a
If the set has two characters: for
each element in it: return the
element, with the permutation of the
rest of the elements added, like so:
perm(ab) ->
...