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memory_get_peak_usage() with “real usage”
...ent is set to true the PHP DOCS say it will get the real size of memory allocated from system. If it's false it will get the memory reported by emalloc()
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Increasing the maximum number of TCP/IP connections in Linux
...local_port_range = 32768 61000
net.ipv4.tcp_fin_timeout = 60
This basically means your system cannot consistently guarantee more than (61000 - 32768) / 60 = 470 sockets per second. If you are not happy with that, you could begin with increasing the port_range. Setting the range to 15000 61000 is...
PDB文件：每个开发人员都必须知道的 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...PDB和binay存储到symbol server前，还需要对PDB运行进行source indexing， source indexing的作用是将PDB和source关联起来。
接下来的部分假设有已经设置好了symbol server和source server indexing。TFS2010中可以很简单地完成对一个新的build的source inde...
Retrieving the last record in each group - MySQL
... p2.maxpostid | 1 | Using where |
| 2 | DERIVED | pi | index | NULL | OwnerUserId | 8 | NULL | 1151268 | Using index |
+----+-------------+------------+--------+----------------------------+-------------+---------+--------------+---------+---...
php implode (101) with quotes
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This has the added benefit of allowing you to escape any single quotes which may appear in the array elements
– user229044♦
May 24 '11 at 18:17
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Remove unwanted parts from strings in a column
... any workaround to avoid the settingwithcopywarning: Try using .loc[row_indexer,col_indexer] = value instead
– PV8
Oct 2 '19 at 13:50
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What's the difference between Git Revert, Checkout and Reset?
...couple of different things depending on how it is invoked. It modifies the index (the so-called "staging area"). Or it changes which commit a branch head is currently pointing at. This command may alter existing history (by changing the commit that a branch references).
Using these commands
If a c...
Can I install/update WordPress plugins without providing FTP access?
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https://github.com/WordPress/WordPress/blob/4.2.2/wp-admin/includes/file.php#L912
WordPress will try to write a temporary file to your /wp-content directory. If this succeeds, it compares the ownership of the file with its own uid, and if there is a match it will allow you to use the 'direct' met...
PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
I just had some very strange behavior with a simple php script I was writing. I reduced it to the minimum necessary to recreate the bug:
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How do I install from a local cache with pip?
...seriously flawed? If you don't want PyPI to be reachable, that's what --no-index is for; a download cache is surely orthogonal to reaching PyPI or not!
– lvh
Dec 1 '13 at 11:51
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