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In php, is 0 treated as empty?
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The following things are considered to be empty:
"" (an empty string)
0 (0 as an integer)
0.0 (0 as a float)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
var $var; (a variable declared, but without a value in a class)
Note that this is exactly the same list...
sqlalchemy unique across multiple columns
...queConstraint or Index constructs explicitly.
As these belong to a Table and not to a mapped Class, one declares those in the table definition, or if using declarative as in the __table_args__:
# version1: table definition
mytable = Table('mytable', meta,
# ...
Column('customer_id', Integ...
Why does Python code use len() function instead of a length method?
...that python has a len() function that is used to determine the size of a string, but I was wondering why it's not a method of the string object.
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Android Fragment lifecycle over orientation changes
...created automatically
}
Be warned though: problems will occur if you try and access Activity Views from inside the Fragment as the lifecycles will subtly change. (Getting Views from a parent Activity from a Fragment isn't easy).
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update columns values with column of another table based on condition [duplicate]
... @Sam, that is because you are referencing table1 in the UPDATE and FROM clauses (the same table is referenced twice). According to the script you are actually updating the field in the table you are querying rather than the one you are updating. The SET clause should reference the UPDATE...
How to get just numeric part of CSS property with jQuery?
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This will clean up all non-digits, non-dots, and not-minus-sign from the string:
$(this).css('marginBottom').replace(/[^-\d\.]/g, '');
UPDATED for negative values
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Android Replace “…” with ellipsis character
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@TusharPandey- if your code is <string name="searching">Searching...</string> then it will look something like <string name="searching">Searching&#x2026</string>
– Jadeye
Apr 18 '15 at 20:33
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private[this] vs private
...Without private[this]
object ObjectPrivateDemo {
def main(args: Array[String]) {
var real = new User("realUserName", "realPassword")
var guest = new User("dummyUserName", "dummyPassword")
real.displayUser(guest)
}
}
class User(val username:String,val password:String) {
private...
How to update a value, given a key in a hashmap?
Suppose we have a HashMap<String, Integer> in Java.
17 Answers
17
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How can I remove an SSH key?
...r. The problem is I lost my ~/.ssh directory (with the original id_rsa and id_rsa.pub files).
7 Answers
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