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Is there a Unix utility to prepend timestamps to stdin?
... strftime() appears to be a GNU awk extension, so if you're on Mac OS, for example, use gawk instead of awk.
– Joe Shaw
Mar 8 '12 at 14:24
...
PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
...
A PostgreSQL "schema" is roughly the same as a MySQL "database". Having many databases on a PostgreSQL installation can get problematic; having many schemas will work with no trouble. So you definitely want to go with one databa...
How do I print a list of “Build Settings” in Xcode project?
...mple
PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
LANG en_US.US-ASCII
IPHONEOS_DEPLOYMENT_TARGET 4.1
ACTION ...
How to delete a specific line in a file?
...
why do we have to open and close it twice?
– Ooker
Jun 25 '14 at 13:48
3
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Is it safe to remove selected keys from map within a range loop?
...stom type that implements the func (a T) expired() bool interface. For purposes of this example, you could try: m := make(map[int]int) /* populate m here somehow */ for key := range (m) { if key % 2 == 0 { /* this is just some condition, such as calling expired */ delete(m, key); } }
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An operation on a socket could not be performed because the system lac...
...是 5000"适用于"一节中包含的产品中。在这些产品中添加一个新参数。若要增加的最大临时端口数，请执行以下步骤：
启动注册表编辑器。
在注册表中，找到以下注册表子项，然后单击参数：
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSe...
解决：apache2.service: Failed to run \'start\' task: No such file or d...
...-to-run-start-task-no-such-file-or-directory今天重启apache2时，出现一个错误：apache2 service: Failed to run & 39;start& 39; task: No such file or directory。原因是：& 39; var tmp& 39;目录被删掉了导致的。mkdir var tmp 搞定。今天 systemctl reload apache2.service 重...
解决Scrapy警告:You do not have a working installation of the service_i...
...操作时，出现如下错误：从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装...
An operation on a socket could not be performed because the system lac...
...是 5000"适用于"一节中包含的产品中。在这些产品中添加一个新参数。若要增加的最大临时端口数，请执行以下步骤：
启动注册表编辑器。
在注册表中，找到以下注册表子项，然后单击参数：
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSe...
解决Scrapy警告:You do not have a working installation of the service_i...
...操作时，出现如下错误：从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装...