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if, elif, else statement issues in Bash
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U. Windl
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answered Apr 16 '13 at 10:34
fedorqui 'SO stop harming'fedorqui ...
Check if a string contains one of 10 characters
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Reed CopseyReed Copsey
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Hidden Features of JavaScript? [closed]
... is being deprecated.
– ken
Dec 29 '10 at 21:50
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show 6 more comments
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Validate that a string is a positive integer
...formerly-allowed) way that says a leading zero means octal (base 8), e.g "010" => 8. Once you've validated the number, you can safely use parseInt(str, 10) to ensure that it's parsed as decimal (base 10). parseInt would ignore garbage at the end of the string, but we've ensured there isn't any wi...
Double vs. BigDecimal?
...as a certain precision. Working with doubles of various magnitudes (say d1=1000.0 and d2=0.001) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.
The disadvantage of BigDecimal is that it's slower, and...
How to study design patterns? [closed]
...is book, OO made sense. @SimpleFellow The GoF book is dull. Without prior knowledge about design patterns it gets you to sleep in no time. It is however a good (the) reference book and should be part of any professionals library along with DDD and P of EAA.
– mbx
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Java - get pixel array from image
...t.println("Testing convertTo2DUsingGetRGB:");
for (int i = 0; i < 10; i++) {
long startTime = System.nanoTime();
int[][] result = convertTo2DUsingGetRGB(hugeImage);
long endTime = System.nanoTime();
System.out.println(String.format("%-2d: %s", (i + 1), to...
What exactly is the meaning of an API? [closed]
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@user166390 wikipedia entry on api is now pretty bad...I write apis and that entry actually confused me. good thing you quoted what you did, as it has somehow gotten much worse apparently.
– eric
Dec 30 '14 at 14:37
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Finding all possible combinations of numbers to reach a given sum
..., partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
#sum([5, 10])=15
This type of algorithms are very well explained in the following Standford's Abstract Programming lecture - this ...
Count with IF condition in MySQL query
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@mojuba not 100% the same, your trick returns null when COUNT (no conditions) would've returned 0. When COUNT would've returned anything but 0, but the SUM does return 0, your trick returns 0.
– Robin Kanters
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