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What does %s mean in a python format string?
What does %s mean in Python? And what does the following bit of code do?
7 Answers
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Why does ~True result in -2?
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and ~1 is:
11111110
Which is -2 in Two's complement1
1 Flip all the bits, add 1 to the resulting number and interpret the result as a binary representation of the magnitude and add a negative sign (since the number begins with 1):
11111110 → 00000001 → 00000010
↑ ↑...
Default value for field in Django model
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Set editable to False and default to your default value.
http://docs.djangoproject.com/en/stable/ref/models/fields/#editable
b = models.CharField(max_length=7, default='0000000', editable=False)
Also, your id field is unnecessary....
How to select lines between two marker patterns which may occur multiple times with awk/sed
Using awk or sed how can I select lines which are occurring between two different marker patterns? There may be multiple sections marked with these patterns.
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How to duplicate object properties in another object?
Given the object:
14 Answers
14
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Struct like objects in Java
Is it completely against the Java way to create struct like objects?
20 Answers
20
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:: (double colon) operator in Java 8
...call the reduce method using Math.max(int, int) as follows:
reduce(new IntBinaryOperator() {
int applyAsInt(int left, int right) {
return Math.max(left, right);
}
});
That requires a lot of syntax for just calling Math.max. That's where lambda expressions come into play. Since Jav...
A proper wrapper for console.log with correct line number?
I'm now developing an application, and place a global isDebug switch. I would like to wrap console.log for more convenient usage.
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How To: Execute command line in C#, get STD OUT results
How do I execute a command-line program from C# and get back the STD OUT results? Specifically, I want to execute DIFF on two files that are programmatically selected and write the results to a text box.
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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
...t one-to-one, one-to-many and many-to-many relationships while designing tables with some examples?
4 Answers
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