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how to get the one entry from hashmap without iterating
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Get values, convert it to an array, get array's first element:
map.values().toArray()[0]
W.
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How to read lines of a file in Ruby
...rns about handling any type of line endings since both "\r\n" and "\r" are converted to Linux standard "\n" before parsing the lines.
To support the "\r" EOL character along with the regular "\n", and "\r\n" from Windows, here's what I would do:
line_num=0
text=File.open('xxx.txt').read
text.gsub!...
Can I escape html special chars in javascript?
... You can even use it on a fresh element if you just want to convert like this: const str = "foo<>'\"&"; $('<div>').text(str).html() yields foo&lt;&gt;'"&amp;
– amoebe
Nov 14 '17 at 21:46
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Can a C# lambda expression have more than one statement?
...pression using braces, but only the syntax which doesn't use braces can be converted into an expression tree:
// Valid
Func<int, int> a = x => x + 1;
Func<int, int> b = x => { return x + 1; };
Expression<Func<int, int>> c = x => x + 1;
// Invalid
Expression...
Why does modern Perl avoid UTF-8 by default?
...broken and dangerous. Might as well poke the other eye out, too.
Code that converts unknown characters to ? is broken, stupid, braindead, and runs contrary to the standard recommendation, which says NOT TO DO THAT! RTFM for why not.
Code that believes it can reliably guess the encoding of an unmarke...
INNER JOIN vs LEFT JOIN performance in SQL Server
...(ID, Name) VALUES (4, 'Four')
INSERT #Test2 (ID, Name) VALUES (5, 'Five')
SELECT *
FROM #Test1 t1
INNER JOIN #Test2 t2
ON t2.Name = t1.Name
SELECT *
FROM #Test1 t1
LEFT JOIN #Test2 t2
ON t2.Name = t1.Name
DROP TABLE #Test1
DROP TABLE #Test2
If you run this and view the execution plan, you'll se...
Writing/outputting HTML strings unescaped
...med mystring...
You can use:
@Html.Raw(mystring)
Alternatively you can convert your string to HtmlString or any other type that implements IHtmlString in model or directly inline and use regular @:
@{ var myHtmlString = new HtmlString(mystring);}
@myHtmlString
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What is sr-only in Bootstrap 3?
...span></a></b></li>
</ul>
You see which one is selected (sr-only part is hidden):
Default
Static top
Fixed top
You hear which one is selected if you use screen reader:
Default
Static top
Fixed top (current)
As a result of this technique blind people supposed to na...
How long is the SHA256 hash?
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you can use this select statement to test it: SELECT length(to_base64(unhex(sha2('say hello to my little friend',256)))) , it is always 44 whatever the length of original string is.
– DrAhmedJava
Apr 9 '...
Calling a function from a string in C#
...s a string with the name of the method I wanted to pass as delegate and to convert the string to a delegate inside the method. Very nice answer. Thanks. Check this link https://msdn.microsoft.com/en-us/library/53cz7sc6(v=vs.110).aspx
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