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The term “Context” in programming? [closed]
I have been programming for some months now and a frequently used word is "context" in classes. Like ServletContext (Java), Activity (Android), Service (Java, Android), NSManagedContext (Objective-C, iOS).
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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
I guess I'm not clear on how to do "and" tests. I wanted to make sure an argument existed which was working well with [ -e $VAR ] , but it turns out that was also evaluating as true on an empty string; which I do not want.
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What does asterisk * mean in Python? [duplicate]
...nary.
Also, see Function Calls.
Assuming that one knows what positional and keyword arguments are, here are some examples:
Example 1:
# Excess keyword argument (python 2) example:
def foo(a, b, c, **args):
print "a = %s" % (a,)
print "b = %s" % (b,)
print "c = %s" % (c,)
print a...
How can I repeat a character in Bash?
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You can use:
printf '=%.0s' {1..100}
How this works:
Bash expands {1..100} so the command becomes:
printf '=%.0s' 1 2 3 4 ... 100
I've set printf's format to =%.0s which means that it will always print a single = no matter what argument it is given. Therefore it prints 100 =s.
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How to parse JSON in Java
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I agree with @StaxMan. I just tried org.json and it's horribly cumbersome. It really doesn't play with with standard Java Collection types, for example.
– Ken Williams
Nov 12 '14 at 16:55
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What is Double Brace initialization in Java?
...es an anonymous class derived from the specified class (the outer braces), and provides an initialiser block within that class (the inner braces). e.g.
new ArrayList<Integer>() {{
add(1);
add(2);
}};
Note that an effect of using this double brace initialisation is that you're creating...
Password hint font in Android
...rent solutions, the second of which has better behavior for me:
1) Remove android:inputType="textPassword" from your xml file and instead, in set it in java:
EditText password = (EditText) findViewById(R.id.password_text);
password.setTransformationMethod(new PasswordTransformationMethod());
Wit...
How to make a DIV visible and invisible with JavaScript
...roperty of that element. To show/hide, you can use two properties: display and visibility, which have slightly different effects:
Adjusting style.display will look as if element is not present at all ("removed").
elem.style.display = 'none'; // hide
elem.style.display = 'block'; // show - use this...
How do I convert seconds to hours, minutes and seconds?
...his is the best way, IMHO, as you can then use arithmetic on the timedelta and any datetime objects.
– Matthew Schinckel
Apr 22 '09 at 3:13
13
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Capturing mobile phone traffic on Wireshark
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Here are some suggestions:
For Android phones, any network: Root your phone, then install tcpdump on it. This app is a tcpdump wrapper that will install tcpdump and enable you to start captures using a GUI. Tip: You will need to make sure you supply the ri...