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What is the colon operator in Ruby?
...ifferent objects, even if they are equal content. == compares the content, and the equivalent checks with symbols are much faster.
user system total real
string 0.370000 0.000000 0.370000 ( 0.371700)
str == str 0.330000 0.000000 0.330000 ( 0.326368...
How do I drop a function if it already exists?
...ion with a check to see if it already exists? If it exists, I want to drop and re-create it.
11 Answers
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Visual Studio Expand/Collapse keyboard shortcuts [duplicate]
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Collapse to definitions
CTRL + M, O
Expand all outlining
CTRL + M, X
Expand or collapse everything
CTRL + M, L
This also works with other languages like TypeScript and JavaScript
share...
iPad keyboard will not dismiss if modal ViewController presentation style is UIModalPresentationForm
...ing to be entering data in a modal form so they are trying to be "helpful" and keep the keyboard visible where ordinarily various transitions within the modal view can cause the keyboard to show/hide repeatedly.
edit: here is the response of an Apple engineer on the developer forums:
Was your v...
How to print to console when using Qt
I'm using Qt4 and C++ for making some programs in computer graphics. I need to be able to print some variables in my console at run-time, not debugging, but cout doesn't seem to work even if I add the libraries. Is there a way to do this?
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Count the number of commits on a Git branch
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If you merge another branch into the current branch without fast forward and you do the above, the merge is also counted. This is because for git a merge is a commit.
If you don't want to count these commits add --no-merges:
git rev-list --no-merges --count HEAD ^develop
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How to initialize log4j properly?
...ile it used to initialize itself, which loggers / appenders got configured and how etc.
The configuration file can be a java properties file or an xml file. Here is a sample of the properties file format taken from the log4j intro documentation page:
log4j.rootLogger=debug, stdout, R
log4j.appen...
How to see the changes between two commits without commits in-between?
... The advantage of using git apply vs. patch is you can include renames and some other changes that are specific to git. I like using git format-patch and git am.
– Russell
Jun 12 '12 at 11:23
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Convert Data URI to File then append to FormData
...ers. Part of the task is to extract an image file from the canvas object and append it to a FormData object for upload.
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getActivity() returns null in Fragment function
... suggest adding an
onAttach(Activity activity)
method to your Fragment and putting a break point on it and seeing when it is called relative to your call to asd(). You'll see that it is called after the method where you make the call to asd() exits. The onAttach call is where the Fragment is att...