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How to trim a string to N chars in Javascript?
...ust use substring... string.substring(0, 7); The first argument (0) is the starting point. The second argument (7) is the ending point (exclusive). More info here.
var string = "this is a string";
var length = 7;
var trimmedString = string.substring(0, length);
...
PowerShell script to return versions of .NET Framework on a machine?
..."\|$" |
# Then we can build the table by looking for unique lines that start with ".NET Framework"
Select-String "^.NET" | Select-Object -Unique |
# And flip it so it's key = value
# And convert ".NET FRAMEWORK 4.5.2" to [version]4.5.2
ForEach-Object {
[version]$v, [int...
Appending the same string to a list of strings in Python
...ments:', len(l)
l1 = list( l )
l2 = list( l )
# Method A
start_time = time.time()
l2 = [s + mystring for s in l2]
stop_time = time.time()
dt1 = stop_time - start_time
del l2
#~ print "Method A: %s seconds" % (dt1)
# Method B
start_time = time.time()
...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...= easy_connection_add_listen(eio_, NULL, port_, &handler_);
rc = easy_eio_start(eio_);
easy_eio_wait(eio_);
easy_eio_create(eio_, io_thread_count_)做了如下几件事：
1. 分配一个easy_pool_t, 用来存放easy_io_t对象，io_thread_count_个io线程(easy_io_thread_t)，初始化针对每...
What is a “bundle” in an Android application
...ionContext(), SecondActivity.class);
intent.putExtra("myKey", AnyValue);
startActivity(intent);
You can get the passed values by doing:
Bundle extras = intent.getExtras();
String tmp = extras.getString("myKey");
You can find more info at:
android-using-bundle-for-sharing-variables and
Pass...
Creating C formatted strings (not printing them)
...per(const char *format, ...) {
char* string;
va_list args;
va_start(args, format);
if(0 > vasprintf(&string, format, args)) string = NULL; //this is for logging, so failed allocation is not fatal
va_end(args);
if(string) {
log_out(string);
free(str...
How to 'insert if not exists' in MySQL?
I started by googling, and found this article which talks about mutex tables.
10 Answers
...
MySQL maximum memory usage
...th EXPLAIN. Add to that that MySQL's EXPLAIN is really limited, but it's a start.
Suggested configurations
About these my-large.cnf and my-medium.cnf files -- I don't even know who those were written for. Roll your own.
Tuning primer
A great start is the tuning primer. It's a bash script (hint: ...
AngularJS and its use of Dollar Variables
...fixed properties, for example the 'json' filter will not output a variable starting with '$'.
– Schmuli
Dec 27 '12 at 20:48
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Structure padding and packing
... the order of the members will be preserved and that the first member will start at 0 offset.
– martinkunev
Dec 8 '17 at 14:32
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