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Iterate over object keys in node.js
...low for better optimisation.
Benchmark
As you can see Object.keys is significantly faster. Whether the actual memory storage is more optimum is a different matter.
var async = {};
async.forEach = function(o, cb) {
var counter = 0,
keys = Object.keys(o),
len = keys.length;
var next = f...
Tomcat: How to find out running tomcat version
...
if you can upload a JSP file you may print out some info like in this example: bestdesigns.co.in/blog/check-jsp-tomcat-version
Save this code into a file called tomcat_version.jsp:
Tomcat Version : <%= application.ge...
CMake unable to determine linker language with C++
...d".
In my case this was due to having C++ files with the .cc extension.
If CMake is unable to determine the language of the code correctly you can use the following:
set_target_properties(hello PROPERTIES LINKER_LANGUAGE CXX)
The accepted answer that suggests appending the language to the proj...
How do I get the type of a variable?
...ing (via template CRTP), but in any case the type of the variable must be known to the compiler.
If you are in the position to don't know what it is or could be, it is because you designed something as the language has a dynamic type-system.
If that's the case you had better to re-think your desig...
Count the number of commits on a Git branch
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rev-list --count flag doesn't exist in git 1.7. Right now, the downvoted-to-hell suggestions below using git log are working better than any other suggestions.
– aaronbauman
Jan 21 '16 at 14:20
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Cast a Double Variable to Decimal
...Note that a floating point number is not suited to keep an exact value, so if you first add numbers together and then convert to Decimal you may get rounding errors. You may want to convert the numbers to Decimal before adding them together, or make sure that the numbers aren't floating point number...
PHP - Move a file into a different folder on the server
...ebsite to delete their images off the server after they have uploaded them if they no longer want them. I was previously using the unlink function in PHP but have since been told that this can be quite risky and a security issue. (Previous code below:)
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Email address validation using ASP.NET MVC data type attributes
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If you are using .NET Framework 4.5, the solution is to use EmailAddressAttribute which resides inside System.ComponentModel.DataAnnotations.
Your code should look similar to this:
[Display(Name = "Email address")]
[Require...
Java : How to determine the correct charset encoding of a stream
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juniversalchardet is now on GitHub.
– deamon
May 23 '18 at 8:49
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What does an exclamation mark mean in the Swift language?
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OK. So the docs talk about using ! when you know for sure it can be unwrapped. But you can run the code fine without it (a forth option for your list - implicit unwrapping) AND without checking first. You get back the value or nil if nil. But if you know for sure that ...