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Find MongoDB records where array field is not empty
...d only happen if pictures is a sub-doc, not an array. e.g. pictures: {'2': 123}
– JohnnyHK
Aug 24 '15 at 19:46
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Optional Parameters with C++ Macros
Is there some way of getting optional parameters with C++ Macros? Some sort of overloading would be nice too.
14 Answers
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Better way of incrementing build number?
...at (e.g. 1.0.0)
# This splits a two-decimal version string, such as "0.45.123", allowing us to increment the third position.
VERSIONNUM=$(/usr/libexec/PlistBuddy -c "Print CFBundleShortVersionString" "${PROJECT_DIR}/${INFOPLIST_FILE}")
NEWSUBVERSION=`echo $VERSIONNUM | awk -F "." '{print $3}'`
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What are the undocumented features and limitations of the Windows FINDSTR command?
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Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
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some configuration will new root permission
Also listed manuals for other OS
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Is there more to an interface than having the correct methods
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What makes interfaces useful is not the fact that "you can change your mind and use a differen...
小米360同日竞技：智能手机血战再起 - 资讯 - 清泛网 - 专注C/C++及内核技术
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小米推定位产品
美国科技媒体人沃尔特·莫斯伯格(Walt Mossberg)最近在评测文章中说：“小米Note满足了他对苹果手机的所有想象。”
小米科技推出小米Note顶配版，目的是重新定义高端市场旗舰机标准。莫斯伯格评价说：“即使...
What is Objective C++? [closed]
...able classes).
Yes, you can use this language in Xcode to develop for Mac OS X, iPhone/iPodTouch, iPad. It works very well.
You don't have to do anything weird in your project to use Objective-C++. Just name your Objective-C files with the extension .mm (instead of .m) and you are good to go.
It ...
Where does Java's String constant pool live, the heap or the stack?
...mple, if you init the following objects:
String s1 = "abc";
String s2 = "123";
String obj1 = new String("abc");
String obj2 = new String("def");
String obj3 = new String("456);
String literals s1 and s2 will go to string constant pool, objects obj1, obj2, obj3 to the heap. All of them, will be r...
Download a file with Android, and showing the progress in a ProgressDialog
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There are many ways to download files. Following I will post most common ways; it is up to you to decide which method is better for your app.
1. Use AsyncTask and show the download progress in a dialog
This method will allow you to execute some background processes and update the...