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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...izeof(struct Y); /* = 8 */
const int sizeZ = sizeof(struct Z); /* = 8 */
One can minimize the size of structures by sorting members by alignment (sorting by size suffices for that in basic types) (like structure Z in the example above).
IMPORTANT NOTE: Both the C and C++ standards state that stru...
How to merge 2 JSON objects from 2 files using jq?
...If you also want to get rid of the other keys (like your expected result), one way to do it is this:
jq -s '.[0] * .[1] | {value: .value}' file1 file2
Or the presumably somewhat more efficient (because it doesn't merge any other values):
jq -s '.[0].value * .[1].value | {value: .}' file1 file2
...
Google App Engine: Is it possible to do a Gql LIKE query?
Simple one really. In SQL, if I want to search a text field for a couple of characters, I can do:
12 Answers
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javascript: recursive anonymous function?
...is not visible outside the function (well, it's not supposed to be; that's one of the weirdnesses). It's like "letrec" in Lisp.
As for arguments.callee, that's disallowed in "strict" mode and generally is considered a bad thing, because it makes some optimizations hard. It's also much slower than...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...s not conform e.g. 2.5 version or lower. Below is a Servlet 4.0 compatible one (which matches Tomcat 9+, WildFly 11+, Payara 5+, etc).
<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
...
Why does String.valueOf(null) throw a NullPointerException?
...chosen:
JLS 15.12.2.5 Choosing the Most Specific Method
If more than one member method is both accessible and applicable to a method invocation, it is necessary to choose one to provide the descriptor for the run-time method dispatch. The Java programming language uses the rule that the most s...
Actual meaning of 'shell=True' in subprocess
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Sorry my previous comment went before I was done. To be clear: I often see subprocess use with shell = True and the command is a string, e.g. 'ls -l', (I expect to avoid this error) but subprocess takes a list (and a string as a one element list). To run with out invoki...
Draw a perfect circle from user's touch
...ic Computer Vision technique for detecting a shape is the Hough Transform. One of the nice things about the Hough Transform is that it is very tolerant of partial data, imperfect data and noise. Using Hough for a circle:
http://en.wikipedia.org/wiki/Hough_transform#Circle_detection_process
Given th...
Passing arguments to C# generic new() of templated type
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This is currently one of the most annoying limitations of C#. I would like to make my classes immutable: Having just private setters would make the class impossible to be in an invalid state by side effects. I also like to use that Func and la...
How can I have Github on my own server?
...is GitHub Enterprise to satisfy your needs. And there is an open source "clone" of Github Enterprise.
PS: Now Github provides unlimited private repositories, bitbucket does the same. you can give a try to both. There are several other solutions as well.
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