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Can you supply arguments to the map(&:method) syntax in Ruby?
...mcaplan suggested in the comment below, you could create a shorter syntax, if you rename the with method to call. In this case, ruby has a built in shortcut for this special method .().
So you could use the above like this:
class Symbol
def call(*args, &block)
->(caller, *rest) { call...
What does -fPIC mean when building a shared library?
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PIC stands for Position Independent Code
and to quote man gcc:
If supported for the target machine, emit position-independent code, suitable for dynamic linking and avoiding any limit on the size of the global offset table. This option makes a difference on the m68k, PowerPC and SPARC. ...
What's the difference between the various methods to get a Context?
...d Application.
Reading the article a little bit further tells about the difference between the two and when you might want to consider using the application Context (Activity.getApplicationContext()) rather than using the Activity context this). Basically the Application context is associated wit...
Check that Field Exists with MongoDB
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@fernandohur: yeah, but if you have less than one page of documents, you won't even see the difference. And if you were to run this query from external driver, I'm pretty sure most of them shield you from the cursor implementation detail.
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Best way to add comments in erb
How do we add comments in erb files, if we do not want them to be generated into the html content?
7 Answers
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WebAPI Delete not working - 405 Method Not Allowed
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I found the solution eventually!
If you come across the same issue, add the following to your web.config
<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true"&g...
jQuery equivalent of getting the context of a Canvas
...the element from .get(0) may not fail so silently... You can easily check if the canvas was found first before .get(0) like
if( $("#canvas").length ) ctx = $("#canvas").get(0).getContext('2d');
else console.log('Error: Canvas not found with selector #canvas');
...
Border in shape xml
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If you want make a border in a shape xml. You need to use:
For the external border,you need to use:
<stroke/>
For the internal background,you need to use:
<solid/>
If you want to set corners,you need to use...
How to select/get drop down option in Selenium 2
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deselectAll will throw an UnsupportedOperationException if the select does not support multiple selections
– Tom Hartwell
Mar 20 '13 at 19:42
4
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Remove Primary Key in MySQL
...property before dropping the key:
ALTER TABLE user_customer_permission MODIFY id INT NOT NULL;
ALTER TABLE user_customer_permission DROP PRIMARY KEY;
Note that you have a composite PRIMARY KEY which covers all three columns and id is not guaranteed to be unique.
If it happens to be unique, you c...