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Placeholder in IE9
...use on single page applications. You need to trigger it manually for dynamically added fields. Other than that, works great!
– smets.kevin
Nov 18 '13 at 14:41
1
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Best way to serialize an NSData into a hexadeximal string
...malString = [someData hexadecimalString];
This is "probably" better than calling [someData description] and then stripping the spaces, <'s, and >'s. Stripping characters just feels too "hacky". Plus you never know if Apple will change the formatting of NSData's -description in the future.
N...
Cleanest way to write retry logic?
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Blanket catch statements that simply retry the same call can be dangerous if used as a general exception handling mechanism. Having said that, here's a lambda-based retry wrapper that you can use with any method. I chose to factor the number of retries and the retry timeout ou...
Test if characters are in a string
...pression" below, but the idea is it's a smarter way to match the string (R calls this "character", eg class("abc")), and "Print" because it's a command line program, emitting output means it prints to its output string.
Now, the grep program is basically a filter, from lines of input, to lines of o...
What is a segmentation fault?
...d it may lead to segfault in a more complex use case, where other function calls might lead the stack to grow and contain the data pointed to by the dangling pointer. writing to that data (local vars) would lead to undefined behavior (segfault &Co)
– Ayman Khamouma
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Return value in a Bash function
...at should provide data cannot also echo other stuff to stdout, because the caller using $() will receive that too and get confused or have to parse the output. Global variables are not great because it's just a matter of time before you use the same global var in two places that happen to be nested ...
How do I get the result of a command in a variable in windows?
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IF NOT "%1"=="" GOTO ADDV
SET VAR=
FOR /F %%I IN ('DIR *.TXT /B /O:D') DO CALL %0 %%I
SET VAR
GOTO END
:ADDV
SET VAR=%VAR%!%1
:END
All output lines are stored in VAR separated with "!".
@John: is there any practical use for this? I think you should watch PowerShell or any other programming lan...
Getting the name of a variable as a string
...rst print gives test, the print in the loop raises VarnameRetrievingError: Callee's node cannot be detected.
– Tillus
Jul 17 at 10:14
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Reverse a string in Python
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@Tanner [::-1] is fastest because it does not call any external functions, rather it's using slicing, which is highly-optimized in python. ''.join(list(reversed(s))) makes 3 function calls.
– hd1
Apr 27 at 13:51
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When would you use delegates in C#? [closed]
... I use delegates for:
Event handlers (for GUI and more)
Starting threads
Callbacks (e.g. for async APIs)
LINQ and similar (List.Find etc)
Anywhere else where I want to effectively apply "template" code with some specialized logic inside (where the delegate provides the specialization)
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