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How to do ToString for a possibly null object?
...# 6.0 we can now have a succinct, cast-free version of the orignal method:
string s = myObj?.ToString() ?? "";
Or even using interpolation:
string s = $"{myObj}";
Original Answer:
string s = (myObj ?? String.Empty).ToString();
or
string s = (myObjc ?? "").ToString()
to be even more concise.
Unfo...
In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
In C#, I want to initialize a string value with an empty string.
30 Answers
30
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How can I get the named parameters from a URL using Flask?
...
Use request.args to get parsed contents of query string:
from flask import request
@app.route(...)
def login():
username = request.args.get('username')
password = request.args.get('password')
...
How can I check if multiplying two numbers in Java will cause an overflow?
...If you're writing a large application, for example for a business, then an extra JAR on the classpath won't do any harm and Guava has lots of very useful code in it. It's much better to reuse their carefully tested code than to try to write your own version of the same (which I presume is what you r...
Emulate a do-while loop in Python?
...lso, is this real code where you are processing comments? What if you have strings with slashes? ie: print "blah // <-- does that mess you up?"
– Tom
Apr 13 '09 at 7:44
4
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List columns with indexes in PostgreSQL
...ect
t.relname as table_name,
i.relname as index_name,
array_to_string(array_agg(a.attname), ', ') as column_names
from
pg_class t,
pg_class i,
pg_index ix,
pg_attribute a
where
t.oid = ix.indrelid
and i.oid = ix.indexrelid
and a.attrelid = t.oid
and a.attn...
Number of days between two dates in Joda-Time
...o achieve the behavior of android.text.format.DateUtils.getRelativeTimeSpanString() with joda and this was really useful.
– gosho_ot_pochivka
Jun 27 '13 at 10:28
1
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Best GWT widget library? [closed]
...se due to the dependency on some external AJAX library. This, as well, add extra size to your solution. Note, as well, that most of the widget libraries depend on one or more additional external components.
– IgorM
May 18 '09 at 20:09
...
What does Python's eval() do?
...d and have python execute it. So you could have the user type in a command string and then have python run it as code. So for example: eval("__import__('os').remove('file')").
– BYS2
Feb 21 '12 at 19:24
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Why doesn't JavaScript support multithreading?
...en more than one core), and the difficulties there are way larger than the extra possibilities.
For the future of JavaScript, check this out:
https://developer.mozilla.org/presentations/xtech2006/javascript/
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