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What is C# analog of C++ std::pair?
...it like this:
Pair<String, int> pair = new Pair<String, int>("test", 2);
Console.WriteLine(pair.First);
Console.WriteLine(pair.Second);
This outputs:
test
2
Or even this chained pairs:
Pair<Pair<String, int>, bool> pair = new Pair<Pair<String, int>, bool>()...
Extract a regular expression match
...
One way would be this:
test <- regexpr("[0-9]+","aaa12456xxx")
Now, notice regexpr gives you the starting and ending indices of the string:
> test
[1] 4
attr(,"match.length")
[1] 5
So you can use that info with substr function
subst...
How do I create a new line in Javascript?
...ML tag for a newline:
document.write("<br>");
The string Hello\n\nTest in your source will look like this:
Hello!
Test
The string Hello<br><br>Test will look like this in HTML source:
Hello<br><br>Test
The HTML one will render as line breaks for the person vie...
Checking if a key exists in a JavaScript object?
...
Checking for undefined-ness is not an accurate way of testing whether a key exists. What if the key exists but the value is actually undefined?
var obj = { key: undefined };
obj["key"] !== undefined // false, but the key exists!
You should instead use the in operator:
"key" ...
MySQL Query GROUP BY day / month / year
...may be more efficient than DATE_FORMAT(). (I don't have a MySQL for proper testing, though.)
– Andriy M
Mar 26 '13 at 12:23
...
Get the index of the object inside an array, matching a condition
...big arrays a simple loop will perform much better than findIndex:
let test = [];
for (let i = 0; i < 1e6; i++)
test.push({prop: i});
let search = test.length - 1;
let count = 100;
console.time('findIndex/predefined function');
let fn = obj => obj.prop === search;
...
Using StringWriter for XML Serialization
...ter. If you manually added <?xml version="1.0" encoding="utf-8"?><test/> to the string, then declaring the SqlParameter to be of type SqlDbType.Xml or SqlDbType.NVarChar would give you the "unable to switch the encoding" error. Then, when inserting manually via T-SQL, since you switched ...
How to display HTML tags as plain text [duplicate]
... may use htmlspecialchars()
<?php
$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);
echo $new; // &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;
?>
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Make maven's surefire show stacktrace in console
I'd like to see the stacktrace of unit tests in the console. Does surefire support this?
3 Answers
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How do I syntax check a Bash script without running it?
...to run. type [ says "[ is a shell builtin". It ultimately delegates to the test program, but it expects a closing bracket, as well. So it's like if test"$var", which isn't what the author meant, but is syntactically valid (say $var has a value of "a", then we will see "bash: testa: command not found...