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How to take the first N items from a generator or list in Python? [duplicate]
...tart, stop, step)
Remember, slicing a generator will exhaust it partially. If you want to keep the entire generator intact, perhaps turn it into a tuple or list first, like: result = tuple(generator)
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What's the dSYM and how to use it? (iOS SDK)
...the machine that compiled the app binary (a machine that stores the dSYM)
If you have the dSYM but don't have the machine the compiled the app binary follow the instructions in this link in order to install the dSYM into the machine
For more information please see apple technical note TN2151
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Upgrade Node.js to the latest version on Mac OS
Currently I am using Node.js v0.6.16 on Mac OS X 10.7.4. Now I want to upgrade it to the latest Node.js v0.8.1. But after downloading and installing the latest package file from nodejs.org, I found that system is still using v0.6.16 instead of v0.8.1 when I typed "node -v" in a terminal. Is there an...
Convert list to dictionary using linq and not worrying about duplicates
...e's the obvious, non linq solution:
foreach(var person in personList)
{
if(!myDictionary.Keys.Contains(person.FirstAndLastName))
myDictionary.Add(person.FirstAndLastName, person);
}
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Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
...ke your time! I recommend setting up your constraints in code because you know exactly which constraints are being added where, and it's a lot easier to debug when things go wrong. Adding constraints in code can be just as easy as and significantly more powerful than Interface Builder using layout a...
Are there any reasons to use private properties in C#?
...at the C# property construct can also be used with a private access modifier:
16 Answers
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How to tell if a tag failed to load
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The "onload" listener will be fired even if there's a javascript error.
– Luca Matteis
Feb 11 '09 at 21:38
38
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SQL Server - Create a copy of a database table and place it in the same database?
...however, are -not- copied.
You can run this query multiple times with a different table name each time.
If you don't need to copy the data, only to create a new empty table with the same column structure, add a WHERE clause with a falsy expression:
SELECT *
INTO ABC_1
FROM ABC
WHERE 1 <>...
Are lists thread-safe?
...r example:
L[0] += 1
is not guaranteed to actually increase L[0] by one if another thread does the same thing, because += is not an atomic operation. (Very, very few operations in Python are actually atomic, because most of them can cause arbitrary Python code to be called.) You should use Queues...
How do I check if a string is valid JSON in Python?
In Python, is there a way to check if a string is valid JSON before trying to parse it?
4 Answers
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