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Different types of thread-safe Sets in Java
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1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old array, avoiding necessity of synchronization between...
JComboBox Selection Change Listener?
....setBounds(84, 45, 150, 20);
contentPane.add(comboBox);
JComboBox comboBox_1 = new JComboBox();
comboBox_1.setBounds(84, 97, 150, 20);
contentPane.add(comboBox_1);
comboBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent arg0) {
//Do Something
}
});
...
Why can't you modify the data returned by a Mongoose Query (ex: findById)
...d(req.params.id).lean().exec(function(err, data){
var len = data.survey_questions.length;
var counter = 0;
_.each(data.survey_questions, function(sq){
Question.findById(sq.question, function(err, q){
sq.question = q;
if(++counter == len) {
...
Compiling dynamic HTML strings from database
...ata-require="angular.js@1.0.7" data-semver="1.0.7" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.js"></script>
<script src="script.js"></script>
</head>
<body>
<h1>Compile dynamic HTML</h1>
<div ng-controller="MyCo...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
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Neither. You should use bcrypt. The hashes you mention are all optimized to be quick and easy on hardware, and so cracking them share the same qualities. If you have no other choice, at least be sure to use a long salt and re-hash multiple times.
Using bcrypt in PHP 5.5+
PHP 5.5 of...
HTML5 canvas ctx.fillText won't do line breaks?
...culating the yOffset yourself). I think a lot of the power with the canvas API is that it separates the lower-level drawing functionality from what you can already do (perform the necessary measurements). Also, you can know the text height simply by providing the text size in pixels; in other words:...
std::shared_ptr thread safety explained
...ly regarding your original 3 questions.
But the ending part of your edit
Calling reset() in thread IV will delete previous instance of A class created in first thread and replace it with new instance? Moreover after calling reset() in IV thread other threads will see only newly created object?
is ...
windows C++ gbk转为utf-8 - C/C++ - 清泛网 - 专注C/C++及内核技术
...码转换为linux使用的utf8格式的，否则会出现乱码。
//m_string是windows下的中文字符串
//utf8_string是返回转换为utf8编码的中文字符串
//slen是utf8_string字符数组的大小
int multichar_2_utf8(const char *m_string,char *utf8_string,int slen) {
int le...
SVN: Is there a way to mark a file as “do not commit”?
...rtoiseSVN has a built in changelist, "ignore-on-commit", which is automatically excluded from commits. The command-line client does not have this, so you need to use multiple changelists to accomplish this same behavior (with caveats):
one for work you want to commit [work]
one for things you want...
Can you use @Autowired with static fields?
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In short, no. You cannot autowire or manually wire static fields in Spring. You'll have to write your own logic to do this.
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