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Disable Required validation attribute under certain circumstances
...ue it uses some special logic to update the model, such as hashing a value etc.
16 Answers
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Is there a limit to the length of HTML attributes?
...he length of tag
names, attribute names, attribute
values, text nodes, etc. While
implementors are encouraged to avoid
arbitrary limits, it is recognized
that practical concerns will likely
force user agents to impose nesting
depth constraints.
So I suppose that is your answer.
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Assign a variable inside a Block to a variable outside a Block
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yes block are the most used functionality , so in order to avoid the retain cycle we should avoid using the strong variable,including self inside the block, inspite use the _weak or weakself.
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What is the best way to repeatedly execute a function every x seconds?
...executed, then it waits 60 seconds then it executes again, waits, execute, etc...
No need to complicate things :D
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How to check if command line tools is installed
...de license agreements. You must agree to
both license agreements below in order to use Xcode.
Press enter when it prompts to show you the license agreement.
Hit the Enter key to view the license agreements at
'/Applications/Xcode.app/Contents/Resources/English.lproj/License.rtf'
IMPORTANT: BY ...
How to escape os.system() calls?
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subprocess (especially with check_call etc) is often dramatically superior, but there are a few cases where shell escaping is still useful. The main one I'm running into is when I'm having to invoke ssh remote commands.
– Craig Ringer
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What is the difference between Android margin start/end and right/left?
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@Liggliluff bugs, typos, etc :) After API 17 start/end take precedence and there's a LINT warning if you still use the old ones. They are ignored, I tried.
– Martin Marconcini
Feb 6 '17 at 23:12
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How to include file in a bash shell script
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In my situation, in order to include color.sh from the same directory in init.sh, I had to do something as follows.
. ./color.sh
Not sure why the ./ and not color.sh directly. The content of color.sh is as follows.
RED=`tput setaf 1`
GREEN=...
How can I add the sqlite3 module to Python?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Why doesn't println! work in Rust unit tests?
... happens because Rust test programs hide the stdout of successful tests in order for the test output to be tidy. You can disable this behavior by passing the --nocapture option to the test binary or to cargo test:
#[test]
fn test() {
println!("Hidden output")
}
Invoking tests:
% rustc --test ma...