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Is unsigned integer subtraction defined behavior?
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107
The result of a subtraction generating a negative number in an unsigned type is well-defined:
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How is set() implemented?
I've seen people say that set objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What other implications does that implementation have?
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How to add new item to hash
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Create the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
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How to deep copy a list?
...bitrary Python objects.
See the following snippet -
>>> a = [[1, 2, 3], [4, 5, 6]]
>>> b = list(a)
>>> a
[[1, 2, 3], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b # b changes too ->...
Is 0 a decimal literal or an octal literal?
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Yes, 0 is an Octal literal in C++.
As per the C++ Standard:
2.14.2 Integer literals [lex.icon]
integer-literal:
decimal-literal integer-suffixopt
octal-literal integer-suffixopt
hexadecimal-literal integer-suffixopt
decimal-literal:
nonzero-digit
decim...
How to git bundle a complete repo
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194
What is the right invocation to:
Bundle all the branches in the current repo
S...
split string in to 2 based on last occurrence of a separator
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120
Use rpartition(s). It does exactly that.
You can also use rsplit(s, 1).
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PHP prepend associative array with literal keys?
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Can't you just do:
$resulting_array = $array2 + $array1;
?
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What does the WPF star do (Width=“100*”)
...r Height="*" means proportional sizing.
For example: to give 30% to column 1 and 70% to column 2 -
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="7*" />
And likewise for rows -
<RowDefinition Height="3*" />
<RowDefinition Height="7*" />
The numbers do not ha...
What is the difference between assert, expect and should in Chai?
...e all output the following if you do not use a custom message, and foo === 1:
AssertionError: expected 1 to be true
So while the expect and should interface are nicer to read, it is not like one interface is more naturally informative than the other when an assertion fails. This message, whic...