大约有 38,000 项符合查询结果（耗时：0.0386秒） [XML]
How to pass object with NSNotificationCenter
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93
Building on the solution provided I thought it might be helpful to show an example passing your...
How do I use vi keys in ipython under *nix?
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imiricimiric
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Extract substring using regexp in plain bash
... with bash regex :
$ [[ "US/Central - 10:26 PM (CST)" =~ -[[:space:]]*([0-9]{2}:[0-9]{2}) ]] &&
echo ${BASH_REMATCH[1]}
another solution using grep and look-around advanced regex :
$ echo "US/Central - 10:26 PM (CST)" | grep -oP "\-\s+\K\d{2}:\d{2}"
another solution using sed :
$ ...
Why historically do people use 255 not 256 for database field magnitudes?
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answered Feb 26 '10 at 9:44
Greg HewgillGreg Hewgill
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What are “connecting characters” in Java identifiers?
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edited Aug 19 '17 at 0:40
TWiStErRob
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How to find the size of an array in postgresql
...at the array is 1-dimensional (which is likely) and are running PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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Adding days to a date in Python
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594
The previous answers are correct but it's generally a better practice to do:
import datetime
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Show a number to two decimal places
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answered Dec 19 '10 at 15:14
CodemwnciCodemwnci
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Uninstall old versions of Ruby gems
...oose which ones you want to remove
gem uninstall rjb
# remove version 1.1.9 only
gem uninstall rjb --version 1.1.9
# remove all versions less than 1.3.4
gem uninstall rjb --version '<1.3.4'
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Using success/error/finally/catch with Promises in AngularJS
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edited May 9 '14 at 11:36
answered May 9 '14 at 8:32
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