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Get Substring - everything before certain char
... Instead of s.Substring(0, n) one can use s.Remove(n) when it is known (like here) that the length of the string s strictly exceeds n.
– Jeppe Stig Nielsen
Nov 27 '14 at 12:45
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Java: Get last element after split
...dex = str.lastIndexOf('/');
String lastString = str.substring(index +1);
Now lastString has the value "directory"
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How to iterate over a JSONObject?
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org.json.JSONObject now has a keySet() method which returns a Set<String> and can easily be looped through with a for-each.
for(String key : jsonObject.keySet())
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Seeking clarification on apparent contradictions regarding weakly typed languages
...ed. The cast operator violates static typing; it says to the compiler "I know more about the runtime type of this expression than you do". If the developer is wrong, then the runtime will throw an exception in order to protect type safety. If the developer wishes to break type safety or memory safe...
How to find out what character key is pressed?
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@AndyMercer key is now supported by all major browsers: developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/…
– Ray
Dec 23 '18 at 14:22
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Disable Laravel's Eloquent timestamps
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Don't know why I never thought of doing a BaseModel and setting it there. Works beautifully. Just a note according to the documentation pivot tables need it only if setting withTimestamps() now (don't know if this changed from previ...
How to go back to previous page if back button is pressed in WebView?
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If using Android 2.2 and above (which is most devices now), the following code will get you what you want.
@Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
super.onBackPressed();
}
}
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How to unload a package without restarting R
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@AriB.Friedman, now as a question.
– Eric Fail
Jul 9 '13 at 12:41
1
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How to get Sinatra to auto-reload the file after each change?
...eed to install rerun if you haven’t already:
$ gem install rerun
Now if you start your Sinatra app like this:
$ ruby app.rb
All you have to do for reloading is instead do this:
$ rerun 'ruby app.rb'
If you are for instance using rackup, instead do
the following:
$ reru...
How can I make my own base image for Docker?
...ocally and import it
cat centos6-base.tar | docker import - centos6-base
Now you can verify by running it.
docker run -i -t centos6-base cat /etc/redhat-release
The scripts from dotcloud combine first two steps together which make me confused and looks complicated in the beginning.
The docke...