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Python int to binary string?
...re any canned Python methods to convert an Integer (or Long) into a binary string in Python?
35 Answers
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Java: How to set Precision for double value? [duplicate]
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This is an easy way to do it:
String formato = String.format("%.2f");
It sets the precision to 2 digits.
If you only want to print, use it this way:
System.out.printf("%.2f",123.234);
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Linux command to print directory structure in the form of a tree
Is there any linux command that I can call from a Bash script that will print the directory structure in the form of a tree, e.g.,
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Regex to test if string begins with http:// or https://
I'm trying to set a regexp which will check the start of a string, and if it contains either http:// or https:// it should match it.
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Dynamic type languages versus static type languages
...t be proven by the compiler. A simple example being if(1) a = 3; else a = "string";, surely since it's always true, the else-branch will never be executed in the program, and no type error shall occur. But it can't prove these cases in a general way, so it's rejected. This is the major weakness of a...
Getting the index of the returned max or min item using max()/min() on a list
I'm using Python's max and min functions on lists for a minimax algorithm, and I need the index of the value returned by max() or min() . In other words, I need to know which move produced the max (at a first player's turn) or min (second player) value.
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Declaring variables inside loops, good practice or bad practice?
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@BillyONeal: For string and vector specifically, the assignment operator can reuse the allocated buffer each loop, which (depending on your loop) may be a huge time savings.
– Mooing Duck
Jan 9 '18 at 22...
Given a class, see if instance has method (Ruby)
..., not just methods.
For example:
Given an instance of a class that has a String attribute first_name:
<instance>.first_name.class #=> String
<instance>.class.method_defined?(:first_name) #=> true
since first_name is both an attribute and a method (and a string of type String)...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...e integers and I need it in integer type in a query. Some values are empty strings.
The following:
13 Answers
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How can I convert spaces to tabs in Vim or Linux?
...k for all your text, not only spaces in the begin of the line. That mean a string like: "Hey,␣this␣␣␣␣is␣4␣spaces" will become "Hey,␣this⇥is␣4␣spaces", but its not! its a tab!.
To settle this little problem I recomend a search, instead of retab.
:%s/^\(^I*\)␣␣␣␣/\1^I/g
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