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What is your preferred style for naming variables in R? [closed]
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hadleyhadley
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How to convert CharSequence to String?
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@TheOnlyAnil, maybe you should ask that as a question. Comments on an answer to a tangentially related question are not a good place to try and tease out your requirements.
– Mike Samuel
May 5 '15 at 14:38
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What is the proper way to check if a string is empty in Perl?
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For string comparisons in Perl, use eq or ne:
if ($str eq "")
{
// ...
}
The == and != operators are numeric comparison operators. They will attempt to convert both operands to integers before comparing them.
See the perlop man pa...
Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (
...he error and it'll still not update anything. Are you able to view the SQL commands going to your database (EG: SQL Server Profiler for MSSQL)? This way you could see what update it's generated and should be able to see why that update doesn't affect any rows.
– fyjham
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Custom Compiler Warnings
When using the ObsoleteAtribute in .Net it gives you compiler warnings telling you that the object/method/property is obsolete and somthing else should be used. I'm currently working on a project that requires a lot of refactoring an ex-employees code. I want to write a custom attribute that I can u...
Create a hexadecimal colour based on a string with JavaScript
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Just porting over the Java from Compute hex color code for an arbitrary string to Javascript:
function hashCode(str) { // java String#hashCode
var hash = 0;
for (var i = 0; i < str.length; i++) {
hash = str.charCodeAt(i) + ((hash <<...
Showing Travis build status in GitHub repo
I remember recently seeing the Travis build status of a pr or commit in GitHub browsing the repository (but can't find where). I'm not talking about the Travis build status images in README.md but an actual GitHub feature (green box with a friendly check mark).
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Default parameters with C++ constructors [closed]
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91
Definitely a matter of style. I prefer constructors with default parameters, so long as the pa...
How do I print bold text in Python?
...E = '\033[94m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RED = '\033[91m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
END = '\033[0m'
print(color.BOLD + 'Hello World !' + color.END)
share
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How to sleep for five seconds in a batch file/cmd [duplicate]
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One hack is to (mis)use the ping command:
ping 127.0.0.1 -n 6 > nul
Explanation:
ping is a system utility that sends ping requests. ping is available on all versions of Windows.
127.0.0.1 is the IP address of localhost. This IP address is guaranteed ...