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How to know what the 'errno' means?
...LOCK Resource temporarily unavailable
12 ENOMEM Cannot allocate memory
13 EACCES Permission denied
14 EFAULT Bad address
15 ENOTBLK Block device required
16 EBUSY Device or resource busy
17 EEXIST File exists
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What does $_ mean in PowerShell?
... a reference to this, mostly in loops.
$_ (dollar underscore)
'THIS' token. Typically refers to the
item inside a foreach loop.
Task:
Print all items in a collection.
Solution. ... | foreach { Write-Host
$_ }
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Setting variable to NULL after free
... int *nPtr=NULL;. Now, I would agree that this would be redundant, with a malloc following right in the next line. However, if there is code between the declaration and the first initialization, somebody might start using the variable even though it has no value yet. If you null-initialize, you get ...
How can I split a JavaScript string by white space or comma?
...nt to take into account extra characters like your commas (in my case each token may be entered with quotes), I'd do a string.replace() to change the other delimiters to blanks and then split on whitespace.
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No output to console from a WPF application?
...32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kernel32_DllName)]
private static extern IntPtr GetConsoleWindow();
[DllImport(Kernel32_DllName)]
p...
How can I use interface as a C# generic type constraint?
...To check this we have only 1 option: decompile the class, check all member tokens that are used and if one of them is the generic type - check the arguments.
Case 3: Reflection, runtime generic construction
Example:
typeof(CtorTest<>).MakeGenericType(typeof(IMyInterface))
I suppose it's t...
Dynamically changing font size of UILabel
...loat)i];
NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:@{NSFontAttributeName: font}];
CGRect rectSize = [attributedText boundingRectWithSize:CGSizeMake(self.frame.size.width, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin...
How do you remove all the options of a select box and then add one option and select it with jQuery?
...s create a memory leak? The option elements are now inaccessible but still allocated.
– Synetech
Mar 6 '19 at 19:57
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nginx server_name wildcard or catch-all
...ork great. Now I'd like all other domain requests to go to a single index.php - I have loads of domains and subdomains and it's impractical to list them all in an nginx config.
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Inserting code in this LaTeX document with indentation
...Pygments, on the other hand, can be completely customized to highlight any token kind the source language might support. This might include special formatting sequences inside strings, numbers, different kinds of identifiers and exotic constructs such as HTML tags.
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