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Find an element in a list of tuples
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If you just want the first number to match you can do it like this:
[item for item in a if item[0] == 1]
If you are just searching for tuples with 1 in them:
[item for item in a if 1 in item]
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How to detect the currently pressed key?
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if ((Control.ModifierKeys & Keys.Shift) != 0)
This will also be true if Ctrl+Shift is down. If you want to check whether Shift alone is pressed,
if (Control.ModifierKeys == Keys.Shift)
If you're in a class that inh...
Determine whether JSON is a JSONObject or JSONArray
...ich it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
8 Answers
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Correctly determine if date string is a valid date in that format
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If you are using PHP 5.2.x, you should use strtotime to get the unix timestamp then date('Y-m-d', $t) to get the string date. Then you compare them just like this answer.
– pedromanoel
J...
do..end vs curly braces for blocks in Ruby
...-line blocks and curly braces for single line blocks, but there is also a difference between the two that can be illustrated with this example:
puts [1,2,3].map{ |k| k+1 }
2
3
4
=> nil
puts [1,2,3].map do |k| k+1; end
#<Enumerator:0x0000010a06d140>
=> nil
This means that {} has a high...
Check if a string contains one of 10 characters
I'm using C# and I want to check if a string contains one of ten characters, *, &, # etc etc.
6 Answers
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close vs shutdown socket?
In C, I understood that if we close a socket, it means the socket will be destroyed and can be re-used later.
9 Answers
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Fragment onResume() & onPause() is not called on backstack
...They are tightly coupled to the Activity.
Read the Handling the Fragment Lifecycle section of this article.
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How to get a variable value if variable name is stored as string?
How can I retrieve a bash variable value if I have the variable name as string?
7 Answers
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How to detect if my shell script is running through a pipe?
How do I detect from within a shell script if its standard output is being sent to a terminal or if it's piped to another process?
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