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What does the “assert” keyword do? [duplicate]
...ed, execution of the assertion causes evaluation of the boolean expression and an error is reported if the expression evaluates to false. If the assertion is disabled, execution of the assertion has no effect whatsoever.
Where "enabled or disabled" is controlled with the -ea switch and "An error i...
ArrayList vs List in C#
What is the difference between ArrayList and List<> in C#?
12 Answers
12
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How do you delete a column by name in data.table?
...the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents
# Method 2a -- A safe idiom for excl...
how to find host name from IP with out login to the host
...s. When this option is used, there is no
need to provide the name, class and type arguments. dig automatically
performs a lookup for a name like 11.12.13.10.in-addr.arpa and sets
the query type and class to PTR and IN respectively.
...
Most efficient way to convert an HTMLCollection to an Array
... to an Array, other than iterating through the contents of said collection and manually pushing each item into an array?
7 ...
How can I properly handle 404 in ASP.NET MVC?
.../shay/archive/2009/03/06/real-world-error-hadnling-in-asp-net-mvc-rc2.aspx and works in ASP.net MVC 1.0 as well
Here's how I handle http exceptions:
protected void Application_Error(object sender, EventArgs e)
{
Exception exception = Server.GetLastError();
// Log the exception.
ILogger ...
IE7 Z-Index Layering Issues
...'re specifying it relative to other elements in the same stacking context, and although the CSS spec's paragraph on Z-index says a new stacking context is only created for positioned content with a z-index other than auto (meaning your entire document should be a single stacking context), you did co...
How can I read large text files in Python, line by line, without loading it into memory?
...d to read a large file, line by line. Lets say that file has more than 5GB and I need to read each line, but obviously I do not want to use readlines() because it will create a very large list in the memory.
...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
...
Also, It is standard practice for 0 to be construed as FALSE, 1 to be construed as TRUE and Nulls, when allowed, would be reflected as NULL.
– reido113
Jan 29 '13 at 20:36
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Comparing two dataframes and getting the differences
...This approach, df1 != df2, works only for dataframes with identical rows and columns. In fact, all dataframes axes are compared with _indexed_same method, and exception is raised if differences found, even in columns/indices order.
If I got you right, you want not to find changes, but symmetric d...