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Output first 100 characters in a string
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it also works for strings shorter than 100, for example print 'foo'[:100] (note that len('foo') is 3, so even when foo[100] doesn't work, it does)
– Rodrigo Laguna
Mar 28 '18 at 19:40
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What is the best way to tell if a character is a letter or number in Java without using regexes?
... recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks.
9 Answ...
C++, copy set to vector
...:copy doesn't add elements to the container into which you are inserting: it can't; it only has an iterator into the container. Because of this, if you pass an output iterator directly to std::copy, you must make sure it points to a range that is at least large enough to hold the input range.
std...
Show pop-ups the most elegant way
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Based on my experience with AngularJS modals so far I believe that the most elegant approach is a dedicated service to which we can provide a partial (HTML) template to be displayed in a modal.
When we think about it modals are kind of AngularJS ro...
Read the package name of an Android APK
...ied to unzip the APK and read contents of AndroidManifest.xml , but seems it's not a text file.
23 Answers
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IntelliJ IDEA shows errors when using Spring's @Autowired annotation
...ring's @Autowired annotation in the class, but the class is functioning without any problem.
26 Answers
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Database cluster and load balancing
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Database clustering is a bit of an ambiguous term, some vendors consider a cluster having two or more servers share the same storage, some others call a cluster a set of replicated servers.
Replication defines the method by which a set of servers rem...
Problems with contenttypes when loading a fixture in Django
...ango objects"
Some other useful arguments for dumpdata:
--indent=4 make it human readable.
-e sessions exclude session data
-e admin exclude history of admin actions on admin site
-e contenttypes -e auth.Permission exclude objects which are recreated automatically from schema every time during sy...
How to rollback a specific migration?
...f the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back.
For example:
rake db:rollback STEP=5
Will also rollback all the migration that happened later (4, 3, 2 and also 1).
To roll back all migrations back to (and includ...
Adding information to an exception?
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I'd do it like this so changing its type in foo() won't require also changing it in bar().
def foo():
try:
raise IOError('Stuff')
except:
raise
def bar(arg1):
try:
foo()
except Exception as ...