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Python Pandas: Get index of rows which column matches certain value
... frame (whose data may be gibabytes). What about dftest? Doesn't this also allocate a very large intermediate object where the returned index may be very small, or even empty. Are these magically optimized away using lazy views. If not then surely there must be an efficient way.
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Change UICollectionViewCell size on different device orientations
...ls with animation (you can just pass nil to both block params if you've no extra adjustments to perform).
2) Instead of hardcoding the item sizes in -collectionView:layout:sizeForItemAtIndexPath, just divide the height or width of the collectionView's bounds by the number of cells you want to fit o...
Having options in argparse with a dash
...l argument actions, the value of dest is normally inferred from the option strings. ArgumentParser generates the value of dest by taking the first long option string and stripping away the initial -- string. Any internal - characters will be converted to _ characters to make sure the string is a val...
How can I create an error 404 in PHP?
My .htaccess redirects all requests to /word_here to /page.php?name=word_here . The PHP script then checks if the requested page is in its array of pages.
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Geometric Mean: is there a built-in?
...pplication I had in mind they are the same, but of course this is not generally true. Thus, if you want to include optional propagation of zeros, and treat the length(x) differently in the case of NA removal, the following is a slightly longer alternative to the function above.
gm_mean = function(x...
filtering NSArray into a new NSArray in Objective-C
... it may just be easier to convert the function's conditions to a predicate string.
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How to find what code is run by a button or element in Chrome using Developer Tools
...ess the F11 key (Step In) until desired source code appears
Source code finally reached
In the jsFiddle sample provided above, I had to press F11 108 times before reaching the desired event handler/function
Your mileage may vary, depending on the version of jQuery (or framework library) used to bi...
How do I get the application exit code from a Windows command line?
...l% is a shell variable, not an environment variable, and it also returns a string not an int, meaning you can't use EQ/NEQ effectively.
– kayleeFrye_onDeck
Sep 24 '16 at 0:27
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When to use os.name, sys.platform, or platform.system?
...s the system/OS name, e.g. 'Linux', 'Windows' or 'Java'.
An empty string is returned if the value cannot be determined.
"""
return uname()[0]
def uname():
# Get some infos from the builtin os.uname API...
try:
system,node,release,version,machine = os.uname()
ex...
Literal suffix for byte in .NET?
...e var, you can always cast the byte as in var y = (byte) 5
Although not really related, in C#7, a new binary prefix was introduced 0b, which states the number is in binary format. Still there is no suffix to make it a byte though, example:
var b = 0b1010_1011_1100_1101_1110_1111; //int
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