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codestyle; put javadoc before or after annotation?
... only as a package
* private method. Replaced by
* {@link #remove(int)} and {@link #removeAll()}
*/
@Deprecated public synchronized void delItems(int start, int end) {
...
}
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val-mutable versus var-immutable in Scala
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tl;dr: prefer var x: Set[Int] over val x: mutable.Set[Int] since if you pass x to some other function, in the former case, you are sure, that function cannot mutate x for you.
– pathikrit
Oct 3 '15 at 18:30
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Determine the line of code that causes a segmentation fault?
...t the message:
Segmentation fault (core dumped)
a core file is written into your current directory. And you can examine it with the command
gdb your_program core_file
The file contains the state of the memory when the program crashed. A core dump can be useful during the deployment of your s...
Coding Conventions - Naming Enums
...L_SIZE); or if they apply system-wide (i.e. an equivalent "null value" for ints) in a class named "ConstantManager" (or equivalent; like ConstantManager.NULL_INT). (side note; all our constants are in upper case)
As always, your coding standards probably differ from mine; so YMMV.
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get UTC time in PHP
...ary 1 1970 00:00:00 GMT)". Note GMT. The fact that by default your system converts this to your timezone for display, is a user convenience. Internally, its always GMT.
– ToolmakerSteve
Apr 17 '19 at 12:09
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Reading JSON from a file?
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In python 3, we can use below method.
Read from file and convert to JSON
import json
from pprint import pprint
# Considering "json_list.json" is a json file
with open('json_list.json') as fd:
json_data = json.load(fd)
pprint(json_data)
with statement automatically cl...
Immutable class?
...ers.
The following class will create an immutable object:
class ImmutableInt {
private final int value;
public ImmutableInt(int i) {
value = i;
}
public int getValue() {
return value;
}
}
As can be seen in the above example, the value of the ImmutableInt can only be set when ...
What's up with Java's “%n” in printf?
...mode on a dos/windows system then when you write \n the file handling code converts it to \r\n. So by opening a file in text mode and using \n you get the platform specific line ending.
I can see why the designers of java didn't want to replicate C's hacky ideas regarding "text" and "binary" file ...
MongoDB inserts float when trying to insert integer
How do I get Mongo to insert an integer?
4 Answers
4
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How are booleans formatted in Strings in Python?
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>>> print "%r, %r" % (True, False)
True, False
This is not specific to boolean values - %r calls the __repr__ method on the argument. %s (for str) should also work.
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