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Good way of getting the user's location in Android
...specific provider (network/gps)
*/
private Location getLocationByProvider(String provider) {
Location location = null;
if (!isProviderSupported(provider)) {
return null;
}
LocationManager locationManager = (LocationManager) getApplicationContext()
.getSystemServi...
Can overridden methods differ in return type?
...erriding method should be the same.
e.g. if the return type is int, float, string then it should be same
Case 2: If the return type is derived data type:
Output: If the return type of the parent class method is derived type then the return type of the overriding method is the same derived data typ...
Which MySQL datatype to use for an IP address? [duplicate]
...r conversion:
'INSERT INTO `table` (`ipv6`) VALUES ("'.mysqli_real_escape_string(inet_pton('2001:4860:a005::68')).'")'
'SELECT `ipv6` FROM `table`'
$ipv6 = inet_pton($row['ipv6']);
share
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improve...
Convert absolute path into relative path given a current directory using Bash
...m @pini (which sadly handle only a few cases)
Reminder : '-z' test if the string is zero-length (=empty) and '-n' test if the string is not empty.
# both $1 and $2 are absolute paths beginning with /
# returns relative path to $2/$target from $1/$source
source=$1
target=$2
common_part=$source # f...
Count number of occurrences of a given substring in a string
How can I count the number of times a given substring is present within a string in Python?
35 Answers
...
Pass a data.frame column name to a function
...
Is there any way to pass the column name not as a string?
– kmm
Apr 14 '10 at 23:13
...
How to profile a bash shell script slow startup?
... do better -- using \D{...} in PS4 allows completely arbitrary time format strings to be expanded without the performance overhead of launching date as a subprocess.
– Charles Duffy
Jul 18 '13 at 21:35
...
Java 8 List into Map
...
Based on Collectors documentation it's as simple as:
Map<String, Choice> result =
choices.stream().collect(Collectors.toMap(Choice::getName,
Function.identity()));
...
Why is the default value of the string type null instead of an empty string?
It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper() , StartWith() etc...
...
How do you query for “is not null” in Mongo?
...roposition:
db.collection_name.find({"field_name":{$type:2}}) //type:2 == String
You can check on the required attribute's type, it will return all the documents that its field_name queried contains a value because you are checking on the filed's type else if it is null the type condition doesn't...