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Best way to compare two complex objects
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For value types, you can typically just call their Equals method. Even if the fields or properties were never explicitly assigned, they would still have a default value.
For reference types, you should first call ReferenceEquals, which checks for reference equality – this would serve as an ef...
What does `kill -0 $pid` in a shell script do?
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sending the signal 0 to a given PID just checks if any process with the given PID is running and you have the permission to send a signal to it.
For more information see the following manpages:
kill(1)
$ man 1 kill
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If sig is 0, then no signal is sent, but error chec...
Convert nullable bool? to bool
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You ultimately have to decide what the null bool will represent. If null should be false, you can do this:
bool newBool = x.HasValue ? x.Value : false;
Or:
bool newBool = x.HasValue && x.Value;
Or:
bool newBool = x ?? false;
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What is the equivalent of “none” in django templates?
I want to see if a field/variable is none within a Django template. What is the correct syntax for that?
7 Answers
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How do I programmatically determine if there are uncommitted changes?
In a Makefile, I'd like to perform certain actions if there are uncommitted changes (either in the working tree or the index). What's the cleanest and most efficient way to do that? A command that exits with a return value of zero in one case and non-zero in the other would suit my purposes.
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Foreach loop, determine which is the last iteration of the loop
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If you just need to do something with the last element (as opposed to something different with the last element then using LINQ will help here:
Item last = Model.Results.Last();
// do something with last
If you need to do ...
Can HTML be embedded inside PHP “if” statement?
I would like to embed HTML inside a PHP if statement, if it's even possible, because I'm thinking the HTML would appear before the PHP if statement is executed.
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Check variable equality against a list of values
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You could use an array and indexOf:
if ([1,3,12].indexOf(foo) > -1)
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handlerbars.js check if list is empty
Is there a way in Handlebars.js templating to check if the collection or list is null or empty, before going and iterating through the list/collection?
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Check if EditText is empty. [closed]
I have 5 EditTexts in android for users to input. I would like to know if I could have a method for checking all the 5 EditTexts if they are null. Is there any way to do this??
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