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How is a CRC32 checksum calculated?
... x^5 + x^4 + 3*x^3 + x^2 + x^1 + x^0 (or that original number we had)
I know this is a leap of faith but this is beyond my capability as a line-programmer. If you are a hard-core CS-student or engineer I challenge to break this down. Everyone will benefit from this analysis.
So to work out a full...
C# Double - ToString() formatting with two decimal places but no rounding
...094.7563) / 100;
- 5094 / 100
- 50.94
And there's your answer truncated, now to format the string simply do the following:
string s = string.Format("{0:N2}%", x); // No fear of rounding and takes the default number format
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GroupBy pandas DataFrame and select most common value
I have a data frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
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Delete column from SQLite table
...wing query:
CREATE TABLE table_name (Column_1 TEXT,Column_2 TEXT);
=>Now insert the data into table_name from existing_table with the following query:
INSERT INTO table_name (Column_1,Column_2) FROM existing_table;
=>Now drop the existing_table by following query:
DROP TABLE existing_ta...
What's the best practice to round a float to 2 decimals? [duplicate]
...that allows you to round a number to the number of decimals that you want. Now you need two, but maybe you would like to try with 3 to compare results, and this function gives you this freedom.
/**
* Round to certain number of decimals
*
* @param d
* @param decimalPlace
* @return
*/
public stati...
Are std::vector elements guaranteed to be contiguous?
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Now I know why my program was segfaulting yesterday, when I looped through it in a double loop removing certain elements :) Thanks!
– user2891462
Jul 30 '15 at 15:29
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How do I override __getattr__ in Python without breaking the default behavior?
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-1 This does modify default behavior. Now you have an AttributeError without the context of the attribute in the exception args.
– wim
Nov 26 '18 at 19:43
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How can I conditionally require form inputs with AngularJS?
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This feature is documented by now: docs.angularjs.org/api/ng/directive/ngRequired
– bjunix
May 9 '16 at 11:42
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Regular vs Context Free Grammars
...copies of y.) You basically have one "nonterminal" that can be expanded.
Now, what about context-free languages? There's an analogous pumping lemma for context-free languages that breaks the strings in the language into five parts, uvxyz, and where all instances of the language are in uvixyiz, fo...
Asynchronous vs synchronous execution, what does it really mean? [closed]
... system simulates this by allocating slices of time to different threads.
Now, if you introduce multiple cores/processors into the mix, then things CAN actually happen at the same time. The operating system can allocate time to one thread on the first processor, then allocate the same block of time...