大约有 30,000 项符合查询结果(耗时:0.0496秒) [XML]

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how to calculate binary search complexity

... Two answers - First one here: Even if there is no error in the math, we can see that 2.43 average is still better than 3.5 average for linear, and this is at a low value. Once you get into the 100s of entries, log2() is much much better than linear. I think you see this ...
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Equivalent of “throw” in R

How does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it. ...
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Count occurrences of a char in plain text file

... 1100000 occurences of the searched character: real 0m0.089s user 0m0.057s sys 0m0.027s Time for Vereb answer with echo, cat, tr and bc for the same file: real 0m0.168s user 0m0.059s sys 0m0.115s Time for Rob Hruska answer with tr, sed and wc for the same file: real 0m0.465s u...
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Properties file in python (similar to Java Properties)

... MattGood! – Dan H May 11 '12 at 20:05 1 if you add pip install and a code example your answer wi...
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How to remove “index.php” in codeigniter's path

...ase. – Sean Vieira Jan 10 '15 at 18:05 add a comment  |  ...
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Leaflet - How to find existing markers, and delete markers?

...;. – Brett DeWoody Apr 14 '14 at 22:05 The cloudmade API that is included for the tiles in this example seems to be in...
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Best way to give a variable a default value (simulate Perl ||, ||= )

... to do $var = @$var ?: 'default value'; If so, why? Given that the only "error" could be that $var isn't set, and that we don't care if $var isn't set... – Codemonkey Nov 13 '15 at 14:14 ...
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OS detecting makefile

... this breaks on osx too. /bin/sh: -c: line 0: syntax error near unexpected token ,Windows_NT' /bin/sh: -c: line 0: ifeq (,Windows_NT)' make: *** [os] Error 2 – k107 Dec 2 '16 at 7:58 ...
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How can I parse a CSV string with JavaScript, which contains comma in data?

...y one possible definition for "comma-separated values". Edit history 2014-05-19: Added disclaimer. 2014-12-01: Moved disclaimer to top. share | improve this answer | follow...
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Calculating arithmetic mean (one type of average) in Python

... compie 9,1091414 gold badges5050 silver badges7373 bronze badges answered Oct 10 '11 at 17:22 NPENPE 416k81...