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How to check type of variable in Java?
How can I check to make sure my variable is an int, array, double, etc...?
13 Answers
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vim - How to delete a large block of text without counting the lines?
In vim, I often find myself deleting (or copying) large blocks of text. One can count the lines of text and say (for example) 50dd to delete 50 lines.
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pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible
... install in that case, follow this solution. This was at least the case on my Mountain Lion OSX Mac
– qtips
Aug 6 '13 at 0:43
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Quick way to list all files in Amazon S3 bucket?
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@yeliabsalohcin see my answer
– Casey
Dec 23 '19 at 20:37
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Fully backup a git repo?
...you need a different tool? Although I also prefer git bundle I don't think my answer is wrong, or invalid. You can see both approaches as hot- vs cold-backup.
– KingCrunch
Apr 7 '16 at 7:01
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Using getResources() in non-activity class
...rence to the class in an activty, or getApplicationContext()
public class MyActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
RegularClass regularClass = new RegularClass(this);
}
}
Then you can use it in the constructor (or set it to an instance variab...
SQL Server Insert if not exists
I want to insert data into my table, but insert only data that doesn't already exist in my database.
10 Answers
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Javascript swap array elements
... variable: a = [b, b = a][0]; as pointed out by @Jan Although I still find myself utilizing the temporary variable approach as it's cross-language (e.g. C/C++) and the first approach that usually pops into my mind.
– Ultimater
Aug 15 '18 at 7:22
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Deleting all files in a directory with Python
...a os.listdir and os.remove:
import os
filelist = [ f for f in os.listdir(mydir) if f.endswith(".bak") ]
for f in filelist:
os.remove(os.path.join(mydir, f))
Or via glob.glob:
import glob, os, os.path
filelist = glob.glob(os.path.join(mydir, "*.bak"))
for f in filelist:
os.remove(f)
B...
calling non-static method in static method in Java [duplicate]
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@EJP For security purposes, and this is what I do with my project, in the case of dependency injection, it is useful to only have initialization code be instantiated for initialization, and not at the arbitrary discretion of code using my API. Thus, when an initialization cycle h...