大约有 12,000 项符合查询结果（耗时：0.0410秒） [XML]
How to create dictionary and add key–value pairs dynamically?
... same:
// a simple constructor with a toString prototypal method
function Foo() {
this.myRandomNumber = Math.random() * 1000 | 0;
}
Foo.prototype.toString = function () {
return "Foo instance #" + this.myRandomNumber;
};
dict[new Foo] = "some value";
console.log(dict);
// => {
// "Fo...
How to set variables in HIVE scripts
...ution.
e.g.
hive> set CURRENT_DATE='2012-09-16';
hive> select * from foo where day >= ${hiveconf:CURRENT_DATE}
similarly, you could pass on command line:
% hive -hiveconf CURRENT_DATE='2012-09-16' -f test.hql
Note that there are env and system variables as well, so you can reference ${env...
How can I include raw JSON in an object using Jackson?
...est
public void test() throws IOException {
Pojo pojo = new Pojo("{\"foo\":18}");
String output = mapper.writeValueAsString(pojo);
assertThat(output).isEqualTo("{\"json\":{\"foo\":18}}");
Pojo deserialized = mapper.readValue(output, Pojo.class);
assertThat(deserialized.json.t...
Why was the arguments.callee.caller property deprecated in JavaScript?
...
It is better to use named functions than arguments.callee:
function foo () {
... foo() ...
}
is better than
function () {
... arguments.callee() ...
}
The named function will have access to its caller through the caller property:
function foo () {
alert(foo.caller);
...
What is the shortest function for reading a cookie by name in JavaScript?
...ow cookie names or values are encoded. Calling the function with a string "foo:bar[0]" should return a cookie (literally) named "foo:bar[0]";
New cookies may be written and/or existing cookies modified at any point during lifetime of the page.
Under these assumptions, it's clear that encodeURIComp...
Difference between __str__ and __repr__?
......:
>>> class Sic(object):
... def __repr__(object): return 'foo'
...
>>> print str(Sic())
foo
>>> print repr(Sic())
foo
>>> class Sic(object):
... def __str__(object): return 'foo'
...
>>> print str(Sic())
foo
>>> print repr(Sic())
<...
Can “this” ever be null in Java?
...
the null pointer exception in something like foo.bar() would be thrown when foo is discovered to be null. it does happen before entering the method, but the real story is that there is no method to attempt to call.
– Claudiu
Sep 24...
How to make good reproducible pandas examples
...,3,4,2,1,3,1]})
assert df.equals(eval(dput(df)))
du = pd.get_dummies(df.a,"foo")
assert du.equals(eval(dput(du)))
di = df
di.index = list('abcdefgh')
assert di.equals(eval(dput(di)))
Note that this produces a much more verbose output than DataFrame.to_dict, e.g.,
pd.DataFrame({
'foo_1':pd.Seri...
List all sequences in a Postgres db 8.1 with SQL
... OWNED BY clause of the ALTER SEQUENCE commmand
e.g.
ALTER SEQUENCE foo_id OWNED by foo_schema.foo_table
to set it to be linked to the table foo_table
or
ALTER SEQUENCE foo_id OWNED by NONE
to break the connection between the sequence and any table
The information about this relatio...
Query for array elements inside JSON type
... for its elements:
WITH reports(data) AS (
VALUES ('{"objects":[{"src":"foo.png"}, {"src":"bar.png"}]
, "background":"background.png"}'::json)
)
SELECT *
FROM reports r, json_array_elements(r.data#>'{objects}') obj
WHERE obj->>'src' = 'foo.png';
The CTE (WITH query) jus...