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How to get the Full file path from URI
...i, projection, selection, selectionArgs, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return cursor.getString(column_index);
}
} catch (Exception e) {
...
What's the best practice for primary keys in tables?
...ary keys will be foreign keys in another table as well as used in multiple indexes. The smaller your key, the smaller the index, the less pages in the cache you will use.
Primary keys should never change. Updating a primary key should always be out of the question. This is because it is most likely ...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
.../my.cnf）：
[mysqld]
server_id = 100
log_bin = mysql-bin
log_bin_index = mysql-bin.index
sync_binlog = 1
innodb_flush_log_at_trx_commit = 1
innodb_support_xa = 1
注：一定要保证主从服务器各自的server_id唯一，避免冲突。
注：如果没有指定log_bin的话，缺...
Git submodule head 'reference is not a tree' error
...s commit that modified the submodule and then reseting the super-project's index to refer to a different submodule commit.
Inside, Out
If you already know which commit you want the submodule to use, cd to the submodule, check out the commit you want, then git add and git commit it back in the supe...
How can I use optional parameters in a T-SQL stored procedure?
...fference, can have massive performance implications. The key is to use an index, ignore compact code, ignore worrying about repeating code, you must make a good query execution plan (use an index).
Read this and consider all the methods. Your best method will depend on your parameters, your data,...
How to determine whether a substring is in a different string
... @GamesBrainiac Actually, to do the same in JS it's just string.indexOf(substring) != -1, more here
– LasagnaAndroid
Feb 20 '14 at 20:42
...
How to implement a ConfigurationSection with a ConfigurationElementCollection
...igurationElementCollection
{
public LaneConfigElement this[int index]
{
get { return (LaneConfigElement)BaseGet(index); }
set
{
if (BaseGet(index) != null)
{
BaseRemoveAt(index);
...
Removing nan values from an array
... everywhere that x is a valid number.
Lastly we use this logical array to index into the original array x, to retrieve just the non-NaN values.
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Files showing as modified directly after a Git clone
...L;DR;
core.fileMode
If false, the executable bit differences between the index and the working tree are ignored; useful on broken filesystems like FAT. See git-update-index(1).
The default is true, except git-clone(1) or git-init(1) will probe and set core.fileMode false if appropriate when the r...
HTML5: Slider with two inputs possible?
...t-slider-thumb {
pointer-events: all;
position: relative;
z-index: 1;
outline: 0;
}
section.range-slider input::-moz-range-thumb {
pointer-events: all;
position: relative;
z-index: 10;
-moz-appearance: none;
width: 9px;
}
section.range-slider inpu...