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Remove columns from DataTable in C#
I have a DataSet which I get a DataTable from that I am being passed back from a function call. It has 15-20 columns, however I only want 10 columns of the data.
...
How to redirect 'print' output to a file using python?
...:', filename, file=f) # Python 3.x
However, redirecting stdout also works for me. It is probably fine for a one-off script such as this:
import sys
orig_stdout = sys.stdout
f = open('out.txt', 'w')
sys.stdout = f
for i in range(2):
print 'i = ', i
sys.stdout = orig_stdout
f.close()
Re...
When to catch java.lang.Error?
...r, sometimes you need to catch specific errors.
If you're writing framework-ish code (loading 3rd party classes), it might be wise to catch LinkageError (no class def found, unsatisfied link, incompatible class change).
I've also seen some stupid 3rd-party code throwing subclasses of Error, so yo...
Why does C++ require a user-provided default constructor to default-construct a const object?
...fect (against all versions of the standard) and it was resolved by Core Working Group (CWG) Defect 253. The new wording for the standard states in http://eel.is/c++draft/dcl.init#7
A class type T is const-default-constructible if
default-initialization of T would invoke a user-provided constru...
How to make an AJAX call without jQuery?
How to make an AJAX call using JavaScript, without using jQuery?
23 Answers
23
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ASP.NET Web Site or ASP.NET Web Application?
...5. The main differences are the Web Application Project
was designed to work similar to the Web projects that shipped with Visual Studio 2003. It will compile the application into a single DLL file at build
time. In order to update the project, it must be recompiled and the DLL file
published for ...
What happens if you static_cast invalid value to enum class?
...esulting value is unspecified (and might not be in that range).
Let's look up the range of the enumeration values: [dcl.enum]/7
For an enumeration whose underlying type is fixed, the values of the enumeration are the values of the underlying type.
Before CWG 1766 (C++11, C++14)
Therefore, fo...
Fastest way to check a string contain another substring in JavaScript?
I'm working with a performance issue on JavaScript. So I just want to ask: what is the fastest way to check whether a string contains another substring (I just need the boolean value)? Could you please suggest your idea and sample snippet code?
...
Git Push Error: insufficient permission for adding an object to repository database
...o chmod -R a+rwX .
If you do not fix the underlying cause, the error will keep coming back and you'll have to keep re-running the above commands over and over again.
Underlying Causes
The error could be caused by one of the following:
The repository isn't configured to be a shared repository (s...
How to style dt and dd so they are on the same line?
...
dl {
width: 100%;
overflow: hidden;
background: #ff0;
padding: 0;
margin: 0
}
dt {
float: left;
width: 50%;
/* adjust the width; make sure the total of both is 100% */
background: #cc0;
padding: 0;
margin: 0
}
dd {
float: left;
wi...