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how do I initialize a float to its max/min value?
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@Yacoby, you might want to clarify that numeric_limits<float>::min() doesn't mean most negative value, it means smallest positive.
– MSN
Apr 21 '10 at 16:35
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What will happen if I modify a Python script while it's running?
...magine a python script that will take a long time to run, what will happen if I modify it while it's running? Will the result be different?
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How can I check a C# variable is an empty string “” or null? [duplicate]
...that can be equal to "" or null. Is there just one function that can check if it's not "" or null?
6 Answers
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How to test an SQL Update statement before running it?
...ffected by running a select using the same WHERE clause as the UPDATE.
So if you UPDATE is
UPDATE foo
SET bar = 42
WHERE col1 = 1
AND col2 = 'foobar';
The following will show you which rows will be updated:
SELECT *
FROM foo
WHERE col1 = 1
AND col2 = 'foobar';
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What are the pros and cons of performing calculations in sql vs. in your application
...that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot of data, doing it at the db server will save bandwidth, and disk io if the aggregates can be done inside indexes)
convenience (sql is not the best language for complex work - especially n...
Bootstrap 3 jquery event for active tab change
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If you have to use the change event (regardless of the action from the link), simply use$(document).on('shown.bs.tab', function (e) { console.log('ae'); });
– Aline Matos
May 13 '16 at ...
Array Size (Length) in C#
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If it's a one-dimensional array a,
a.Length
will give the number of elements of a.
If b is a rectangular multi-dimensional array (for example, int[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) an...
What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...ber, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersi...
栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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//方法：入栈操作
public void push(int data) {
if (head == null) {
head = new Node(data);
current = head;
} else {
Node node = new Node(data);
node.pre = current;//current结点将作为当前结点的前驱结...
how to use “AND”, “OR” for RewriteCond on Apache?
...XT confirms that it is used based on the existence of the [OR] flag:
else if ( strcasecmp(key, "ornext") == 0
|| strcasecmp(key, "OR") == 0 ) {
cfg->flags |= CONDFLAG_ORNEXT;
}
The next occurrence of the flag is the actual implementation where you'll find the loop that goes t...