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What is the point of function pointers?
...orithm, but also data:
class functor {
public:
functor(const std::string& prompt) : prompt_(prompt) {}
void operator()(int i) {std::cout << prompt_ << i << '\n';}
private:
std::string prompt_;
};
functor f("the answer is: ");
f(42);
Another advantage is ...
One-liner to recursively list directories in Ruby?
...lt; child.to_s so that you could assign it to an array and get an array of strings? Thanks!
– MCP
Jun 3 '13 at 5:30
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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
...xample, say {1: 'one', 2: 'two'}. The second variant only works for (some) string keys. Using different kinds of syntax depending on the type of the keys would be an unnecessary inconsistency.
It is faster:
$ python -m timeit "dict(a='value', another='value')"
1000000 loops, best of 3: 0.79 usec pe...
Escape string for use in Javascript regex [duplicate]
...
Short 'n Sweet
function escapeRegExp(string) {
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}
Example
escapeRegExp("All of these should be escaped: \ ^ $ * + ? . ( ) | { } [ ]");
>>> "All of th...
What predefined macro can I use to detect clang?
...
Found the answer using strings + grep :
$ strings /usr/bin/clang | grep __ | grep -i clang
__clang__
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Git add all files modified, deleted, and untracked?
...ively,
git add -A .
is equivalent to
git add .
git add -u .
Note the extra '.' on git add -A and git add -u
Warning: Starting with git 2.0 (mid 2013), this will always stage files on the whole working tree.
If you want to stage files under the current path of your working tree, you need to ...
How to find out if an installed Eclipse is 32 or 64 bit version?
...
If your installation is 64-bit the string x86_ (which identifies a 32-bit installation) will still match. You need to look for x86_64_
– Leo
Jan 21 '13 at 15:54
...
Visual Studio : short cut Key : Duplicate Line
...Module DuplicateLastLineModule
Sub DuplicateLine()
Dim line As String
DTE.ActiveDocument.Selection.StartOfLine(0)
DTE.ActiveDocument.Selection.EndOfLine(True)
line = DTE.ActiveDocument.Selection.Text
DTE.ActiveDocument.Selection.EndOfLine()
DTE.Act...
NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder
...ns and change the app flow:
public static boolean isSamsung_4_2_2() {
String deviceMan = Build.MANUFACTURER;
String deviceRel = Build.VERSION.RELEASE;
return "samsung".equalsIgnoreCase(deviceMan) && deviceRel.startsWith("4.2.2");
}
Then in the activity's onCreate method:
if (...
LeanDB 拓展：LeanCloud数据库接入 · App Inventor 2 中文网
... 类型
说明
jsonData
String
要写入的数据集
rows
Number
成功插入的数据个数
假设我们要在 Scores 中保存班级学生的考试成绩，可以直接在 Insert 积...