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What does a double * (splat) operator do
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Ruby 2.0 introduced keyword arguments, and ** acts like *, but for keyword arguments. It returns a Hash with key / value pairs.
For this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
> foo 10, 20, 30
=> [10, [20...
How to retrieve a user environment variable in CMake (Windows)
...Name="Hello World" cmake ..
env [--unset=NAME]... [NAME=VALUE]... COMMAND [ARG]...
Run command in a modified environment.
Just be aware that this may only work the first time. If CMake re-configures with one of the consecutive builds (you just call e.g. make, one CMakeLists.txt was cha...
Truncate a list to a given number of elements
...t an out of bounds exception. Choose the minimum value of the desired size and the current size of the list as the ending index.
Lastly, note that the second argument should be one more than the last desired index.
share
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stash@{1} is ambiguous?
... trying to get info about my stash, but git is telling me that stash@{0} and stash@{1} are ambiguous. git stash list works fine, and .git/logs/refs/stash seems to have the appropriate content (not that I'm an expert on git internals).
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Android - Center TextView Horizontally in LinearLayout
...rLayout it is already in the horizontal center of the layout. When you use android:layout_gravity it places the widget, as a whole, in the gravity specified. Instead of placing the whole widget center what you're really trying to do is place the content in the center which can be accomplished with a...
What is digest authentication?
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The main difference is that it doesn't require sending the username and password across the wire in plaintext. It is also immune to replay-attacks, as it uses a one-time number from the server.
The server gives the client a one-time use number (a nonce) that it combines with the username, re...
How to negate the whole regex?
I have a regex, for example (ma|(t){1}) . It matches ma and t and doesn't match bla .
4 Answers
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IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
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Thanks, I just ran in to this and your fix worked for me as well. I somehow triggered the issue when adding and removing some SDKs (I have multiple versions of the JDK installed on my machine).
– Matt Hurne
Aug 17 '...
jQuery: fire click() before blur() event
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Solution 1
Listen to mousedown instead of click.
The mousedown and blur events occur one after another when you press the mouse button, but click only occurs when you release it.
Solution 2
You can preventDefault() in mousedown to block the dropdown from stealing focus. The slight adva...
Github (SSH) via public WIFI, port 22 blocked
I'm currently on a public WIFI spot and I'm unable to use SSH (they probably blocked that port). However, I need that connection to do a git push .
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