大约有 21,000 项符合查询结果（耗时：0.0319秒） [XML]
Setting variable to NULL after free
...obal variables. Even for local variables, it may be a good approach if the function continues after the memory is released.
To complete the style, you should also initialize pointers to NULL before they get assigned a true pointer value.
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What is the ideal data type to use when storing latitude / longitude in a MySQL database?
... 6 digits after the decimal, plus up to 4 digits before the decimal, e.g. -123.456789 degrees.". If unsigned is checked the pattern will be 1234,567890. So no problems.
– 1.44mb
Feb 19 '14 at 10:58
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What are the differences between the urllib, urllib2, urllib3 and requests module?
... go:
userdata = {"firstname": "John", "lastname": "Doe", "password": "jdoe123"}
resp = requests.post('http://www.mywebsite.com/user', data=userdata)
Plus it even has a built in JSON decoder (again, I know json.loads() isn't a lot more to write, but this sure is convenient):
resp.json()
Or if y...
Iterate through a HashMap [duplicate]
...ChanjungKim yes , its the Name of the HashMap
– heman123
Feb 27 '19 at 22:29
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Jdbctemplate query for string: EmptyResultDataAccessException: Incorrect result size: expected 1, ac
... edited Jun 11 '18 at 16:38
ryan123
58577 silver badges2121 bronze badges
answered May 16 '12 at 5:46
Rakesh J...
Why is lazy evaluation useful?
... they're not going to be used. For example, I may pass three values into a function, but depending on the sequence of conditional expressions, only a subset may actually be used. In a language like C, all three values would be computed anyway; but in Haskell, only the necessary values are computed.
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How to highlight text using javascript
...{
let cur: Node = children[i];
// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
if (cur.nodeType === Node.TEXT_NODE)
{
this.checkAndReplace(cur);
}
...
PHP + MySQL transactions examples
...(mysql_error());
$query = "INSERT INTO employee (ssn,name,phone) values ('123-45-6789','Matt','1-800-555-1212')";
begin(); // transaction begins
$result = mysql_query($query);
if(!$result){
rollback(); // transaction rolls back
echo "transaction rolled back";
exit;
}else{
commit(...
What is the correct way to document a **kwargs parameter?
...rgs argument, but a completely normal one.
– bugmenot123
Jul 15 '19 at 12:26
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decimal vs double! - Which one should I use and when? [duplicate]
...ut at 1 million for a float.
A 15 digit monetary value:
£1,234,567,890,123.45
9 trillion with a double. But with division and comparisons it's more complicated (I'm definitely no expert in floating point and irrational numbers - see Marc's point). Mixing decimals and doubles causes issues:
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