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node.js, Error: Cannot find module 'express'
...
It says
Cannot find module 'express'
Do you have express installed?If not then run this.
npm install express
And run your program again.
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How to set delay in android?
...tDelayed(new Runnable() {
@Override
public void run() {
// Do something after 5s = 5000ms
buttons[inew][jnew].setBackgroundColor(Color.BLACK);
}
}, 5000);
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How to store values from foreach loop into an array?
Need to store values from foreach loop into an array, need help doing that.
8 Answers
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How to iterate over associative arrays in Bash
...u can iterate over the key/value pairs like this:
for i in "${!array[@]}"
do
echo "key : $i"
echo "value: ${array[$i]}"
done
Note the use of quotes around the variable in the for statement (plus the use of @ instead of *). This is necessary in case any keys include spaces.
The confusion in ...
Setting variable to NULL after free
...ngling pointer is accessed after it is freed, you may read or overwrite random memory. If a null pointer is accessed, you get an immediate crash on most systems, telling you right away what the error is.
For local variables, it may be a little bit pointless if it is "obvious" that the pointer isn't...
Why doesn't 'ref' and 'out' support polymorphism?
...=======
UPDATE: I used this answer as the basis for this blog entry:
Why do ref and out parameters not allow type variation?
See the blog page for more commentary on this issue. Thanks for the great question.
=============
Let's suppose you have classes Animal, Mammal, Reptile, Giraffe, Turtle...
QLabel: set color of text and background
How do I set color of text and background of a QLabel ?
6 Answers
6
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if else statement in AngularJS templates
I want to do a condition in an AngularJS template. I fetch a video list from the Youtube API. Some of the videos are in 16:9 ratio and some are in 4:3 ratio.
...
Junit - run set up method once
...nd manage my custom static(!) boolean flag:
private static boolean setUpIsDone = false;
.....
@Before
public void setUp() {
if (setUpIsDone) {
return;
}
// do the setup
setUpIsDone = true;
}
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In Python, how do you convert seconds since epoch to a `datetime` object?
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datetime.datetime.fromtimestamp will do, if you know the time zone, you could produce the same output as with time.gmtime
>>> datetime.datetime.fromtimestamp(1284286794)
datetime.datetime(2010, 9, 12, 11, 19, 54)
or
>>> datetime.datetime.u...