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How does facebook, gmail send the real time notification?
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If you mean APE and NodeJS, you can choose one of them. if you mean periodic AJAX requests and the one i suggested, my solution may fallback to the ajax one when lacks socket support (refer to socket.io docs). In both cases, you nee...
Why malloc+memset is slower than calloc?
...rocesses allocate memory and then read from it without modifying it. This means that a lot of pages in memory across different processes may be filled with pristine zeroes returned from mmap(). Since these pages are all the same, the kernel makes all these virtual addresses point a single shared 4...
Show all Elasticsearch aggregation results/buckets and not just 10
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0 is working on 2.5.2. what do you mean by 2.x onward? do you mean after version 5? I am also curious what kind of memory issues can it cause if I want to return all possible aggs, what would be the difference between setting 0 (max_value) and 10000(Some big u...
How can I sanitize user input with PHP?
...strings within HTML markup, you must escape it with htmlspecialchars. This means that every single echo or print statement should use htmlspecialchars.
A third example could be shell commands: If you are going to embed strings (such as arguments) to external commands, and call them with exec, then ...
Explain the concept of a stack frame in a nutshell
...es or not, it will immediately return from stack with it's stack frame. It means that whenever any recursive function get base condition satisfied and we put a return after base condition, the base condition will not wait to load local variables which are located in the “else” part of program. I...
How to use `string.startsWith()` method ignoring the case?
... performance. For small Strings no problem, but if you have a big one... I mean... Do you really will do a toUpperCase in a 1mb String just to compare 4-10 inicial characters?
– Dyorgio
Apr 7 '16 at 16:52
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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...nd as easy to diagnose as possible.
Regarding your comment "that doesn't mean that the correct answer is false", this is wrong. The predicate (y < x) asks whether y is less than x. If y is NaN, then it is not less than any floating-point value x, so the answer is necessarily false.
I mention...
Eclipse compilation error: The hierarchy of the type 'Class name' is inconsistent
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It means you are trying to implement a non-existing interface or you're extending an non-existing class.
Try to refresh your Eclipse.
If it doesn't work, it may mean that you have a reference to a JAR that is not in the build ...
MFC的多国语言界面的实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...。现在我们需要添加相应的英文的资源文件。
为主窗口IDD_MULTILANGUAGES添加英文资源的方法为：
（1） 打开Resource View窗口。
（2） 右键IDD_MULTILANGUAGES，点击弹出菜单中的“Insert Copy”菜单，如下图所示。
（3） ...
Recursively list all files in a directory including files in symlink directories
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find /dir -type f -follow -print
-type f means it will display real files (not symlinks)
-follow means it will follow your directory symlinks
-print will cause it to display the filenames.
If you want a ls type display, you can do the following
find /dir -type ...