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Good MapReduce examples [closed]
...erations that you can do in MapReduce is the set of normal SQL operations: SELECT, SELECT WHERE, GROUP BY, ect.
Another good example is matrix multiply, where you pass one row of M and the entire vector x and compute one element of M * x.
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Why do we need argc while there is always a null at the end of argv?
...cts), you can just omit the parameter name, like this C++ snippet (easy to convert to C):
#include <stdio.h> // C-compatible include, guarantees puts in global namespace
// program will print contents of argv, one item per line, starting from argv[0]
int main(int /*argc*/, char *argv[]) { /...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
...ng window.loadImage()
b - read exif tags using window.EXIF.getData()
c - convert the image to canvas and fix the image orientation using window.loadImage.scale()
d - place the canvas into the document
here you go :)
window.loadImage("/your-image.jpg", function (img) {
if (img.type === "erro...
How can I save an image to the camera roll?
... app and they can be viewed as small thumbnails. When a small thumbnail is selected it goes to a new view and a fullscreen version can be viewed. I have a button in the right corner of the top nav that says "save" and this is the button that I wish to save the image to the device's cameral roll so t...
What is the definition of “interface” in object oriented programming
...or. However, Java 8 introduced lambda expressions so the C# example can be converted to Java very easily (Func<int> becomes java.util.function.IntSupplier and => becomes ->).
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Saving images in Python at a very high quality
... require images in 1200 / 600 / 300 dpi depending on what the image is of. Convert to desired dpi and format in GiMP or Inkscape.
EDIT: Obviously the dpi doesn't matter since .svg are vector graphics and have "infinite resolution".
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Javascript equivalent of Python's zip function
...utput.
As parseInt's second argument is the base/number radix, to which to convert the number to, and since map passes the index as the second argument to its argument-function, a wrapper function is used.
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How to link to apps on the app store
...llowing rules to your company or app name:
Remove all whitespace
Convert all characters to lower-case
Remove all copyright (©), trademark (™) and registered mark (®) symbols
Replace ampersands ("&") with "and"
Remove most punctuation (See Listing 2 for the set)
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Create RegExps on the fly using string variables
...e commonly you want to replace all occurrences, in which case, you have to convert the string into a global (/.../g) RegExp. You can do this from a string using the new RegExp constructor:
new RegExp(string_to_replace, 'g')
The problem with this is that any regex-special characters in the string ...
Running PostgreSQL in memory only
...atement = ds.getConnection().createStatement();
statement.execute("SELECT 1");
ResultSet resultSet = statement.getResultSet();
resultSet.next();
int resultSetInt = resultSet.getInt(1);
assertEquals("A basic SELECT query succeeds", 1, resultSetInt);
}
}
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