大约有 43,076 项符合查询结果（耗时：0.0312秒） [XML]
Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
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161
Create an environment.plist file in ~/Library/LaunchAgents/ with this content:
<?xml versi...
Disable a group of tests in rspec?
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169
To disable a tree of specs using RSpec 3 you can:
before { skip }
# or
xdescribe
# or
xcont...
MySQL's now() +1 day
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461
You can use:
NOW() + INTERVAL 1 DAY
If you are only interested in the date, not the date and ...
Differences between “BEGIN RSA PRIVATE KEY” and “BEGIN PRIVATE KEY”
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189
See https://polarssl.org/kb/cryptography/asn1-key-structures-in-der-and-pem (search the page f...
Javascript: formatting a rounded number to N decimals
...number, something like:
var s = number.toString();
if (s.indexOf('.') == -1) s += '.';
while (s.length < s.indexOf('.') + 4) s += '0';
(Note that this assumes that the regional settings of the client uses period as decimal separator, the code needs some more work to function for other settings...
How to implement a queue using two stacks?
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710
Keep 2 stacks, let's call them inbox and outbox.
Enqueue:
Push the new element onto inbox
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Grep characters before and after match?
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187
3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o ...
How to sort a collection by date in MongoDB?
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10 Answers
10
Active
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Any reason not to use '+' to concatenate two strings?
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122
There is nothing wrong in concatenating two strings with +. Indeed it's easier to read than ''...
Scala Doubles, and Precision
...e or round a Double? At one point in my code I would like a number like: 1.23456789 to be rounded to 1.23
12 Answers
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