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Use dynamic variable names in JavaScript
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Since ECMA-/Javascript is all about Objects and Contexts (which, are also somekind of Object), every variable is stored in a such called Variable- (or in case of a Function, Activation Object).
So if you create variables like this:
var a = 1,
b ...
Convert Unix timestamp to a date string
...ecognizes neither -d nor -r and provides no standard way in any command at all (that I know of) to format a Unix time from the command line (since POSIX Awk also lacks strftime()). (You can't use touch -t and ls because the former does not accept a time given as seconds since the Unix Epoch.)
Note...
Why does cURL return error “(23) Failed writing body”?
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No. It might help with small documents but when it is too large to fit in the buffer cat uses the error will reappear.You could use -s to silence all error messages (and progress) if you don't need them.
– Kaworu
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Is there a .NET/C# wrapper for SQLite? [closed]
...is the original SQLite database engine and a complete ADO.NET 2.0 provider all rolled into a single mixed mode assembly. It is a complete drop-in replacement for the original sqlite3.dll (you can even rename it to sqlite3.dll). Unlike normal mixed assemblies, it has no linker dependency on the .NE...
How to rename a table in SQL Server?
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And to add, don't accidentally put the schema in the 'NewName' field, otherwise your table might end up looking something like dbo.dbo.NewName.
– Michael Plautz
Jan 23 '17 at 21:12
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How to determine the longest increasing subsequence using dynamic programming?
...ence) which is ending at element with index i. To compute DP[i] we look at all indices j < i and check both if DP[j] + 1 > DP[i] and array[j] < array[i] (we want it to be increasing). If this is true we can update the current optimum for DP[i]. To find the global optimum for the array you c...
ManyRelatedManager object is not iterable
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Try
matches = [val for val in Store.attribute_answers.all() if val in WishList.attribute_answers.all()]
Notice the parenthesis at the end of WishList.attribute_answers.all(). Adding the parenthesis invokes the all function to return an iterable.
If you include the parenthesi...
How to “inverse match” with regex?
...place of .{6}
Edit (again): Note that lookaheads and lookbehinds are generally not the right way to "inverse" a regular expression match. Regexps aren't really set up for doing negative matching, they leave that to whatever language you are using them with.
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Check whether or not the current thread is the main thread
...be executed on the main thread, you can:
- (void)someMethod
{
dispatch_block_t block = ^{
// Code for the method goes here
};
if ([NSThread isMainThread])
{
block();
}
else
{
dispatch_async(dispatch_get_main_queue(), block);
}
}
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Determine .NET Framework version for dll
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This answer is the most helpful. All Windows OSes after 2003 support Powershell. A shell giving immediate feedback, not requiring any additional application support as many of the other answers suggest. Great for a "one off" check of a dll. you're the man @...