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What does the caret operator (^) in Python do?
... one (and only one) of the operands (evaluates to) true." is not exact, it what would be the definition of a boolean xor
– Xavier Combelle
Sep 5 '15 at 17:02
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How to check if a string contains only digits in Java [duplicate]
...parse string as a long value is inefficient and unreliable, and may be not what you need.
What I suggest is to simply check if each character is a digit, what can be efficiently done using Java 8 lambda expressions:
boolean isNumeric = someString.chars().allMatch(x -> Character.isDigit(x));
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Pointers in Python?
...are involved, so the subtlety you crave could be introduced in many ways. What other attributes is form.field suppose to have, for example, besides value? Without that further .value computations, possibilities would include:
class Form(object):
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def __getattr__(self, name):
retur...
How do you use an identity file with rsync?
... Double quotes and using $HOME solved my problem. Can you elaborate on what the first two commands are doing? I was already familiar with setting up a config file - the only problem is when I have multiple accounts on one server. I don't expect that it would let me specify multiple identity file...
What is the difference between synchronous and asynchronous programming (in node.js)
...ogram is doing other things, and once the query data is ready, you will do whatever you want with it.
So, in a nutshell: The first example will block, while the second won't.
The output of the following two examples:
// Example 1 - Synchronous (blocks)
var result = database.query("SELECT * FROM h...
C pointers : pointing to an array of fixed size
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What you are saying in your post is absolutely correct. I'd say that every C developer comes to exactly the same discovery and to exactly the same conclusion when (if) they reach certain level of proficiency with C language.
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What's the dSYM and how to use it? (iOS SDK)
...es .dSYM files. I guess this is a debugging related file, but I don't know what it is, and how to use it.
2 Answers
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Why do pthreads’ condition variable functions require a mutex?
...n tell, I’m going to be creating a mutex just to use as that argument? What is that mutex supposed to do?
10 Answers
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What are the most common font-sizes for H1-H6 tags [closed]
...general best practice baseline. Yes, I know it depends on your design, but what's most common?
2 Answers
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In Python, when should I use a function instead of a method?
...ion which is so dear to OO design.
The encapsulation principal is really what this comes down to: as a designer you should hide everything about the implementation and class internals which it is not absolutely necessarily for any user or other developer to access. Because we deal with instances o...