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数据结构、算法复杂度一览表 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...、数据结构复杂度一览表。来源：http://bigocheatsheet.com/
搜索算法(来源)
算法
数据结构
时间复杂度
空间复杂度
平均
最差
最差
深度优先搜索
图G(V,E), V为顶点集, E为边集
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What are the “standard unambiguous date” formats for string-to-date conversion in R?
...nction (x, format = "", ...)
{
charToDate <- function(x) {
xx <- x[1L]
if (is.na(xx)) {
j <- 1L
while (is.na(xx) && (j <- j + 1L) <= length(x)) xx <- x[j]
if (is.na(xx))
f <- "%Y-%m-%d"
}
...
linux: kill background task
...variable for this in bash:
kill $!
$! expands to the PID of the last process executed in the background.
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Why use pointers? [closed]
...... */
free(x);
/* We can set the size at declaration time as well */
char xx[6];
xx[0] = 'H';
xx[1] = 'e';
xx[2] = 'l';
xx[3] = 'l';
xx[4] = 'o';
xx[5] = '\0';
printf("String \"%s\" at address: %d\n", xx, xx);
Do note that you can still use the variable x after you have performed a free() of the ...
Is volatile expensive?
...ethod} 'run2' '()V' in 'Test2'
# [sp+0x10] (sp of caller)
0xb396ce80: mov %eax,-0x3000(%esp)
0xb396ce87: push %ebp
0xb396ce88: sub $0x8,%esp ;*synchronization entry
; - Test2::run2@-1 (line 33)
0xb396ce8e: mov $0xffffffff,%ecx
0xb396...
HTML5 canvas ctx.fillText won't do line breaks?
..."left";
for (var li in lines) {
var totallen = 0;
var xx, usp;
for (wo in lines[li].Words) totallen += lines[li].Words[wo].l;
if (hAlign == "center") {
usp = sp;
xx = x + w / 2 - (totallen + sp * (lines[li].Words.length - 1)) / 2;
...
How to improve Netbeans performance?
...ew settings and now Netbeans is alright! I add: Dsun.java2d.d3d=false -J-XX:+UseConcMarkSweepGC -J-XX:+CMSClassUnloadingEnabled -J-XX:+CMSPermGenSweepingEnabled. It depends. SSD is good, big RAM too, but that is not all for performance of IDE. I think, that default settings is bad for bigger proj...
HTTP status code 0 - Error Domain=NSURLErrorDomain?
...
The Response was Empty.
Most of the case the codes will stats with 1xx, 2xx, 3xx, 4xx, 5xx.
List of HTTP status codes
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唱吧CEO陈华：创业初期不要找最贵的人 - 资讯 - 清泛网 - 专注C/C++及内核技术
...常浪费时间和精力。
我原来做酷讯时，酷讯有个火车票搜索引擎，非常强大，我们想这个引擎这么好用，是不是可以做别的生意呢？当时想到做租房搜索、二手车搜索、餐馆搜索、机票搜索等，这就是信心膨胀导致的，最后造...
Searching for UUIDs in text with regex
...ere are five equivalent string representations for a GUID:
"ca761232ed4211cebacd00aa0057b223"
"CA761232-ED42-11CE-BACD-00AA0057B223"
"{CA761232-ED42-11CE-BACD-00AA0057B223}"
"(CA761232-ED42-11CE-BACD-00AA0057B223)"
"{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0xB2, 0x2...