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How to export DataTable to Excel
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ExcelFilePath != null && ExcelFilePath != "" could be !String.IsNullOrEmpty(ExcelFilePath)
– Mark Schultheiss
Dec 22 '15 at 22:58
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In C#, What is a monad?
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Most of what you do in programming all day is combining some functions together to build bigger functions from them. Usually you have not only functions in your toolbox but also other things like operators, variable assignments and the like, but generally your...
Get bitcoin historical data [closed]
...mn headers in the CSVs, here's what they are :
column 1) the trade's timestamp,
column 2) the price,
column 3) the volume of the trade
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Add custom icons to font awesome
...Note that the element labelled by the comment "svg path data" in the code sample is what will be assigned as the value of the d attribute on a <path> element that is a child of the <svg>. Like this (leaving out some details for clarity):
<svg>
<path d=SVG_PATH_DATA></pa...
Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error
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Check the Valid Architectures & Build Active Architecture only properties.
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How to remove non-alphanumeric characters?
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Here's an example if you want to include the hyphen as an allowed character. I needed this because I needed to strip out disallowed characters from a Moodle username, based on email addresses: preg_replace("/[^a-z0-9_.@\-]/", '', $strin...
Access-control-allow-origin with multiple domains
...tpContext.Response;
if (!String.IsNullOrWhiteSpace(originHeader) &&
(isLocal || IsAllowedOrigin(originHeader))) {
response.AddHeader(OutgoingOriginHeader, originHeader);
response.AddHeader(OutgoingMethodsHeader, "GET,POST,OPTIONS");
re...
Setting a system environment variable from a Windows batch file?
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The XP Support Tools (which can be installed from your XP CD) come with a program called setx.exe:
C:\Program Files\Support Tools>setx /?
SETX: This program is used to set values in the environment
of the machine or currently logged on user using one of three...
Fastest way to iterate over all the chars in a String
...mode that is worth invoking is on a 64 bit machine. Otherwise it actually hampers performance.
For 32 bit build running in -server mode on an AMD64, I can say this:
String.charAt(i) is the clear winner overall. Although between sizes 8 to 512 characters there were winners among 'new' 'reuse' and 'f...
How to determine an interface{} value's “real” type?
I have not found a good resource for using interface{} types. For example
7 Answers
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