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Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C++内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
Makefile经典教程（入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
...ents that are passed by reference (id *) and are autoreleased on return.
All of this is very well explained in the ARC transition guide.
In your NSError example, the declaration means __strong, implicitly:
NSError * e = nil;
Will be transformed to:
NSError * __strong error = nil;
When you c...
Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
String literals and escape characters in postgresql
...e as 'testing\\x20double-slash', so only single-slash approach works for E'string' style literals
– Alexander
Aug 14 '12 at 14:02
...
Git - working on wrong branch - how to copy changes to existing topic branch
...e merge. Otherwise the changes in master will be included in the merge. An extra step 3.5 above. See further about rebase here:
https://git-scm.com/book/en/v2/Git-Branching-Rebasing
share
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improve...
How to Correctly handle Weak Self in Swift Blocks with Arguments
...
Put [unowned self] before (text: String)... in your closure. This is called a capture list and places ownership instructions on symbols captured in the closure.
share
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...
How to properly reuse connection to Mongodb across NodeJs application and modules
...lhost:27017";
var _db;
module.exports = {
connectToServer: function( callback ) {
MongoClient.connect( url, { useNewUrlParser: true }, function( err, client ) {
_db = client.db('test_db');
return callback( err );
} );
},
getDb: function() {
return _db;
}
};
To...
Use HTML5 to resize an image before upload
...nvas = document.createElement('canvas');
const dataURItoBlob = (dataURI: string) => {
const bytes = dataURI.split(',')[0].indexOf('base64') >= 0 ?
atob(dataURI.split(',')[1]) :
unescape(dataURI.split(',')[1]);
const mime = dataURI.split(',')[0].split(':')[1].split(';'...