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How can I convert a string to a number in Perl?
...laz@Linux_Desktop:~/workspace/akatest_5]$perl -e 'print "nope\n" unless "1,000" > 10;' nope [rabdelaz@Linux_Desktop:~/workspace/akatest_5]$perl -e 'print "nope\n" if "1,000" > 10;'
– Ramy
May 22 '14 at 15:24
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Can I query MongoDB ObjectId by date?
...hex seconds since Unix epoch */
var hexSeconds = Math.floor(timestamp/1000).toString(16);
/* Create an ObjectId with that hex timestamp */
var constructedObjectId = ObjectId(hexSeconds + "0000000000000000");
return constructedObjectId
}
/* Find all documents created after midnigh...
How do I increase the capacity of the Eclipse output console?
...cters) to something much bigger. 2147383647 / ~2GB is the upper limit (or 1000000 / ~1MB in older releases). Or just uncheck the Limit console output.
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What is “2's Complement”?
...ame thing, but switch the role of 0's and 1's (so instead of starting with 0000, start with 1111 - that's the "complement" part).
Let's try it with a mini-byte of 4 bits (we'll call it a nibble - 1/2 a byte).
0000 - zero
0001 - one
0010 - two
0011 - three
0100 to 0111 - four to seven
That's as fa...
Remove duplicate lines without sorting [duplicate]
...ay have also needed the lower memory use since I will be uniq'ing like 100,000,000 lines 8-). Just in case anyone else needs it, I just put a "-u" in the uniq portion of the command:
awk '{print(NR"\t"$0)}' file_name | sort -t$'\t' -k2,2 | uniq -u --skip-fields 1 | sort -k1,1 -t$'\t' | cut -f2 -d$...
Difference between __str__ and __repr__?
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moshezmoshez
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SQL: deleting tables with prefix
...iable to delete ALL tables starting with 'temp_'
SET GROUP_CONCAT_MAX_LEN=10000;
SET @tbls = (SELECT GROUP_CONCAT(TABLE_NAME)
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = 'my_database'
AND TABLE_NAME LIKE 'temp_%');
SET @delStmt = CONCAT('DROP TABL...
Rails: Is there a rails trick to adding commas to large numbers?
...xample:
#inside anywhere
ActiveSupport::NumberHelper.number_to_delimited(1000000) # => "1,000,000"
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Fixed point vs Floating point number
...d represent would be 99999.99999 and the smallest non-zero number would be 00000.00001. Every bit of code that processes such numbers has to have built-in knowledge of where the decimal point is.
A floating point number does not reserve a specific number of bits for the integer part or the fraction...