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将 App Inventor 2 项目连接到外部传感器
Note: This report describes work carried out in Spring 2014 for an Undergraduate A...
How do I check if an array includes a value in JavaScript?
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How to use a switch case 'or' in PHP
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switch ($value)
{
case 1:
case 2:
echo "the value is either 1 or 2.";
break;...
Any way to properly pretty-print ordered dictionaries?
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edited Apr 9 '14 at 12:09
user11784
2344 bronze badges
answered Feb 4 '11 at 12:33
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Specifying an Index (Non-Unique Key) Using JPA
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With JPA 2.1 you should be able to do it.
import javax.persistence.Column;
import javax.persi...
How to track down a “double free or corruption” error
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If you're using glibc, you can set the MALLOC_CHECK_ environment variable to 2, this will cause ...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get:
16 Answers
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Splitting String with delimiter
I am currently trying to split a string 1128-2 so that I can have two separate values. For example, value1: 1128 and value2: 2, so that I can then use each value separately. I have tried split() but with no success. Is there a specific way Grails handles this, or a better way of doing it?
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Determine if map contains a value for a key?
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Does something along these lines exist?
No. With the stl map class, you use ::find() to s...