大约有 16,000 项符合查询结果（耗时：0.0218秒） [XML]
String vs. StringBuilder
...using strings and the plus operator. This is because (like Java, as Eric points out), it internally uses StringBuilder automatically (Actually, it uses a primitive that StringBuilder also uses)
However, if what you are doing is closer to:
string a,b,c,d;
a = a + b;
a = a + c;
a = a + d;
Then ...
Common elements comparison between 2 lists
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This converts A to set twice, unnecessarily wasteful.
– wim
Oct 28 '19 at 21:13
add a comment
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How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
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You should probably promote that comment into your actual answer. Also, from Python 2.7 and Python 3 you can do {el:0 for el in a}. (Feel free to add that into your answer as well.)
– Zooba
Oct 6 '10 at 4:37
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What is the best scripting language to embed in a C# desktop application? [closed]
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Btw - to enable C# script support you can either integrate C# script library inside, or make C# script compilation on your own. I have done similar lightweight C# script compiler into my own project in here: sourceforge.net/p/syncproj/code/HEAD/tree/CsScript.cs C# script ...
How can I selectively escape percent (%) in Python strings?
...of the second table in that section, it states:
'%' No argument is converted, results in a '%' character in the result.
Therefore you should use:
selectiveEscape = "Print percent %% in sentence and not %s" % (test, )
(please note the expicit change to tuple as argument to %)
Without kn...
Understanding slice notation
...ve:
a[start:stop:step] # start through not past stop, by step
The key point to remember is that the :stop value represents the first value that is not in the selected slice. So, the difference between stop and start is the number of elements selected (if step is 1, the default).
The other featur...
Difference between & and && in Java? [duplicate]
... & is not bitwise if the operands are Boolean. Only if they are integral.
– Marquis of Lorne
Nov 30 '13 at 9:27
1
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Pretty-Print JSON in Java
...o pretty-print the data.
JSONObject json = new JSONObject(jsonString); // Convert text to object
System.out.println(json.toString(4)); // Print it with specified indentation
The order of fields in JSON is random per definition. A specific order is subject to parser implementation.
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Getting a timestamp for today at midnight?
...eferences to time, and then pass it to the 'string to time' function which converts a date and time to a epoch timestamp. If it doesn't get a time, it assumes the first second of that day.
References:
Date Function: http://php.net/manual/en/function.date.php
String To Time: http://us2.php.net/manu...
Only variables should be passed by reference
... the php parser where double parenthesis "(())" causes the reference to be converted to a plain value. More on this link.
– Callistino
Apr 1 '14 at 17:22
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