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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...件的策略：
#!/bin/sh
DB_NAME=$1
cd /path/to/$DB_NAME
for INDEX_NUMBER in {5..50}; do
FILE_NAME=$DB_NAME.$INDEX_NUMBER
if [ ! -e $FILE_NAME ]; then
head -c 2146435072 /dev/zero > $FILE_NAME
fi
done
注：数值2146435072并不是标准的2G，这是INT整...
How can I sort arrays and data in PHP?
...nother array comprising a primary key (the value) and a secondary key (its index or position):
array_walk($array, function(&$element, $index) {
$element = array($element, $index); // decorate
});
This transforms the array into this:
[
['Kale', 0], ['Kaleidoscope', 1],
['Aardvark...
How do I pass variables and data from PHP to JavaScript?
...ny value in PHP, arrays, strings,
//even objects.
index.php (or whatever the actual page is named like)
<!-- snip -->
<script>
function reqListener () {
console.log(this.responseText);
}
var oReq = new XMLHttpRequest(); // New request object
...
NSIS学习笔记（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...aq_2013030724.html
[3]Writing a NSIS plugin
http://clseto.mysinablog.com/index.php?op=ViewArticle&articleId=1910084
http://blog.csdn.net/lee353086/article/details/463491571701|1780|1781|1782|1784NSIS 学习笔记
How to parse JSON data with jQuery / JavaScript?
...ype: 'json',
success: function (data) {
$.each(data, function(index, element) {
$('body').append($('<div>', {
text: element.name
}));
});
}
});
or use the $.getJSON method:
$.getJSON('/functions.php', { get_param: 'value' }, f...
Use basic authentication with jQuery and Ajax
...ample u gave but it doesn't work ` $.ajax ({ url: "server.in.local/index.php", beforeSend: function (xhr) { xhr.setRequestHeader(“Authorization”, “Basic ” + encodeBase64 (“username:password”) );}, succes: function(val) { //alert(val); alert("Thanks for your comment!...
How do I dump an object's fields to the console?
..., "downcase!", "dump", "dup", "each", "each_byte", "each_line", "each_with_index", "empty?", "entries", "eql?", "equal?", "extend", "find", "find_all", "freeze", "frozen?", "grep", "gsub", "gsub!", "hash", "hex", "id", "include?", "index", "inject", "insert", "inspect", "instance_eval", "instance_of...
Checking if a field contains a string
...
Note that this will not make efficient use of an index and result in all values being scanned for matches. See the notes on Regular Expressions
– Stennie
Jul 18 '12 at 20:54
...
Remove characters after specific character in string, then remove substring?
...his
string input = "http://www.somesite.com/somepage.aspx?whatever";
int index = input.IndexOf("?");
if (index > 0)
input = input.Substring(0, index);
Edit: If everything after the last slash, do something like
string input = "http://www.somesite.com/somepage.aspx?whatever";
int index = ...
Adding values to a C# array
...pty array like you are suggesting and then try to access it's non existent indexes to set values, you'll get an OutOfRangeException as soon as you run the code. Arrays need to be initialized with the size you are going to use, they reserve all the space at the beginning, witch makes them very fast, ...