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Validate that a string is a positive integer
...se
" " : false
"" : false
DEMO: http://jsfiddle.net/5UCy4/37/
Solution 2
Another way is good for all numeric values which are valid up to Number.MAX_VALUE, i.e. to about 1.7976931348623157e+308:
function isPositiveInteger(n) {
return 0 === n % (!is...
Javascript : Send JSON Object with Ajax?
...ng:JSON.stringify({name:"John", time:"2pm"}) });
Without jQuery:
var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-Type", "application/json");
xmlhttp.send(JSON.stringify({name:"John Rambo", time:"2pm"}));
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How to check if hex color is “too black”?
...ed. You can calculate this in several different way (such is to be human!) http://en.wikipedia.org/wiki/HSL_and_HSV#Lightness
Take the max of R, G, and B.
Take the average of the max and the min from R, G, and B.
Take the average of all three.
Use some weighted average as others have suggested her...
How can I do division with variables in a Linux shell?
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What is the simplest way to convert a Java string from all caps (words separated by underscores) to
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Another option is using Google Guava's com.google.common.base.CaseFormat
George Hawkins left a comment with this example of usage:
CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, "THIS_IS_AN_EXAMPLE_STRING");
...
ERROR: Error 1005: Can't create table (errno: 121)
...un an ALTER TABLE with certain constraint names.
According to the docs at http://dev.mysql.com/doc/refman/5.7/en/innodb-troubleshooting-datadict.html , you can search for these orphan tables with:
SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE '%#sql%';
The version I was work...
What does the * * CSS selector do?
...: 1px solid orange; }
* * * * * * * * { outline: 1px solid blue; }
Demo: http://jsfiddle.net/l2aelba/sFSad/
Example 2:
Demo: http://jsfiddle.net/l2aelba/sFSad/34/
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Scala type programming resources
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What's the difference between interface and @interface in java?
... goes here
}
PS:
Many annotations replace comments in code.
Reference: http://docs.oracle.com/javase/tutorial/java/annotations/declaring.html
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Get time in milliseconds using C#
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You can try the QueryPerformanceCounter native method. See http://www.pinvoke.net/default.aspx/kernel32/QueryPerformanceCounter.html for more information. This is what the Stopwatch class uses.
See How to get timestamp of tick precision in .NET / C#? for more information.
Stopwatch...